| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `crates/hir-ty/src/mir.rs`."><title>mir.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-77263533.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="hir_ty" data-themes="" data-resource-suffix="" data-rustdoc-version="1.94.0 (4a4ef493e 2026-03-02)" data-channel="1.94.0" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-b897f86f.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="../../static.files/src-script-813739b1.js"></script><script defer src="../../src-files.js"></script><script defer src="../../static.files/main-7bab91a1.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-ffcac47a.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">hir_ty/</div>mir.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-4"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="doccomment">//! MIR definitions and implementation |
| <a href=#2 id=2 data-nosnippet>2</a> |
| <a href=#3 id=3 data-nosnippet>3</a></span><span class="kw">use </span>std::{collections::hash_map::Entry, fmt::Display, iter}; |
| <a href=#4 id=4 data-nosnippet>4</a> |
| <a href=#5 id=5 data-nosnippet>5</a><span class="kw">use </span>base_db::Crate; |
| <a href=#6 id=6 data-nosnippet>6</a><span class="kw">use </span>either::Either; |
| <a href=#7 id=7 data-nosnippet>7</a><span class="kw">use </span>hir_def::{ |
| <a href=#8 id=8 data-nosnippet>8</a> DefWithBodyId, FieldId, StaticId, TupleFieldId, UnionId, VariantId, |
| <a href=#9 id=9 data-nosnippet>9</a> expr_store::Body, |
| <a href=#10 id=10 data-nosnippet>10</a> hir::{BindingAnnotation, BindingId, Expr, ExprId, Ordering, PatId}, |
| <a href=#11 id=11 data-nosnippet>11</a>}; |
| <a href=#12 id=12 data-nosnippet>12</a><span class="kw">use </span>la_arena::{Arena, ArenaMap, Idx, RawIdx}; |
| <a href=#13 id=13 data-nosnippet>13</a><span class="kw">use </span>rustc_ast_ir::Mutability; |
| <a href=#14 id=14 data-nosnippet>14</a><span class="kw">use </span>rustc_hash::FxHashMap; |
| <a href=#15 id=15 data-nosnippet>15</a><span class="kw">use </span>rustc_type_ir::inherent::{GenericArgs <span class="kw">as _</span>, IntoKind, Ty <span class="kw">as _</span>}; |
| <a href=#16 id=16 data-nosnippet>16</a><span class="kw">use </span>smallvec::{SmallVec, smallvec}; |
| <a href=#17 id=17 data-nosnippet>17</a><span class="kw">use </span>stdx::{impl_from, never}; |
| <a href=#18 id=18 data-nosnippet>18</a> |
| <a href=#19 id=19 data-nosnippet>19</a><span class="kw">use </span>crate::{ |
| <a href=#20 id=20 data-nosnippet>20</a> CallableDefId, InferenceResult, MemoryMap, |
| <a href=#21 id=21 data-nosnippet>21</a> consteval::usize_const, |
| <a href=#22 id=22 data-nosnippet>22</a> db::{HirDatabase, InternedClosureId}, |
| <a href=#23 id=23 data-nosnippet>23</a> display::{DisplayTarget, HirDisplay}, |
| <a href=#24 id=24 data-nosnippet>24</a> infer::PointerCast, |
| <a href=#25 id=25 data-nosnippet>25</a> next_solver::{ |
| <a href=#26 id=26 data-nosnippet>26</a> Const, DbInterner, ErrorGuaranteed, GenericArgs, ParamEnv, StoredConst, StoredGenericArgs, |
| <a href=#27 id=27 data-nosnippet>27</a> StoredTy, Ty, TyKind, |
| <a href=#28 id=28 data-nosnippet>28</a> infer::{InferCtxt, traits::ObligationCause}, |
| <a href=#29 id=29 data-nosnippet>29</a> obligation_ctxt::ObligationCtxt, |
| <a href=#30 id=30 data-nosnippet>30</a> }, |
| <a href=#31 id=31 data-nosnippet>31</a>}; |
| <a href=#32 id=32 data-nosnippet>32</a> |
| <a href=#33 id=33 data-nosnippet>33</a><span class="kw">mod </span>borrowck; |
| <a href=#34 id=34 data-nosnippet>34</a><span class="kw">mod </span>eval; |
| <a href=#35 id=35 data-nosnippet>35</a><span class="kw">mod </span>lower; |
| <a href=#36 id=36 data-nosnippet>36</a><span class="kw">mod </span>monomorphization; |
| <a href=#37 id=37 data-nosnippet>37</a><span class="kw">mod </span>pretty; |
| <a href=#38 id=38 data-nosnippet>38</a> |
| <a href=#39 id=39 data-nosnippet>39</a><span class="kw">pub use </span>borrowck::{BorrowckResult, MutabilityReason, borrowck_query}; |
| <a href=#40 id=40 data-nosnippet>40</a><span class="kw">pub use </span>eval::{ |
| <a href=#41 id=41 data-nosnippet>41</a> Evaluator, MirEvalError, VTableMap, interpret_mir, pad16, render_const_using_debug_impl, |
| <a href=#42 id=42 data-nosnippet>42</a>}; |
| <a href=#43 id=43 data-nosnippet>43</a><span class="kw">pub use </span>lower::{MirLowerError, lower_to_mir, mir_body_for_closure_query, mir_body_query}; |
| <a href=#44 id=44 data-nosnippet>44</a><span class="kw">pub use </span>monomorphization::{ |
| <a href=#45 id=45 data-nosnippet>45</a> monomorphized_mir_body_for_closure_query, monomorphized_mir_body_query, |
| <a href=#46 id=46 data-nosnippet>46</a>}; |
| <a href=#47 id=47 data-nosnippet>47</a> |
| <a href=#48 id=48 data-nosnippet>48</a><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">use </span>lower::mir_body_cycle_result; |
| <a href=#49 id=49 data-nosnippet>49</a><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">use </span>monomorphization::monomorphized_mir_body_cycle_result; |
| <a href=#50 id=50 data-nosnippet>50</a> |
| <a href=#51 id=51 data-nosnippet>51</a><span class="kw">use </span><span class="kw">super</span>::consteval::try_const_usize; |
| <a href=#52 id=52 data-nosnippet>52</a> |
| <a href=#53 id=53 data-nosnippet>53</a><span class="kw">pub type </span>BasicBlockId = Idx<BasicBlock>; |
| <a href=#54 id=54 data-nosnippet>54</a><span class="kw">pub type </span>LocalId = Idx<Local>; |
| <a href=#55 id=55 data-nosnippet>55</a> |
| <a href=#56 id=56 data-nosnippet>56</a><span class="kw">fn </span>return_slot() -> LocalId { |
| <a href=#57 id=57 data-nosnippet>57</a> LocalId::from_raw(RawIdx::from(<span class="number">0</span>)) |
| <a href=#58 id=58 data-nosnippet>58</a>} |
| <a href=#59 id=59 data-nosnippet>59</a> |
| <a href=#60 id=60 data-nosnippet>60</a><span class="attr">#[derive(Debug, Clone, PartialEq, Eq)] |
| <a href=#61 id=61 data-nosnippet>61</a></span><span class="kw">pub struct </span>Local { |
| <a href=#62 id=62 data-nosnippet>62</a> <span class="kw">pub </span>ty: StoredTy, |
| <a href=#63 id=63 data-nosnippet>63</a>} |
| <a href=#64 id=64 data-nosnippet>64</a> |
| <a href=#65 id=65 data-nosnippet>65</a><span class="doccomment">/// An operand in MIR represents a "value" in Rust, the definition of which is undecided and part of |
| <a href=#66 id=66 data-nosnippet>66</a>/// the memory model. One proposal for a definition of values can be found [on UCG][value-def]. |
| <a href=#67 id=67 data-nosnippet>67</a>/// |
| <a href=#68 id=68 data-nosnippet>68</a>/// [value-def]: https://github.com/rust-lang/unsafe-code-guidelines/blob/master/wip/value-domain.md |
| <a href=#69 id=69 data-nosnippet>69</a>/// |
| <a href=#70 id=70 data-nosnippet>70</a>/// The most common way to create values is via loading a place. Loading a place is an operation |
| <a href=#71 id=71 data-nosnippet>71</a>/// which reads the memory of the place and converts it to a value. This is a fundamentally *typed* |
| <a href=#72 id=72 data-nosnippet>72</a>/// operation. The nature of the value produced depends on the type of the conversion. Furthermore, |
| <a href=#73 id=73 data-nosnippet>73</a>/// there may be other effects: if the type has a validity constraint loading the place might be UB |
| <a href=#74 id=74 data-nosnippet>74</a>/// if the validity constraint is not met. |
| <a href=#75 id=75 data-nosnippet>75</a>/// |
| <a href=#76 id=76 data-nosnippet>76</a>/// **Needs clarification:** Ralf proposes that loading a place not have side-effects. |
| <a href=#77 id=77 data-nosnippet>77</a>/// This is what is implemented in miri today. Are these the semantics we want for MIR? Is this |
| <a href=#78 id=78 data-nosnippet>78</a>/// something we can even decide without knowing more about Rust's memory model? |
| <a href=#79 id=79 data-nosnippet>79</a>/// |
| <a href=#80 id=80 data-nosnippet>80</a>/// **Needs clarification:** Is loading a place that has its variant index set well-formed? Miri |
| <a href=#81 id=81 data-nosnippet>81</a>/// currently implements it, but it seems like this may be something to check against in the |
| <a href=#82 id=82 data-nosnippet>82</a>/// validator. |
| <a href=#83 id=83 data-nosnippet>83</a></span><span class="attr">#[derive(Debug, PartialEq, Eq, Clone)] |
| <a href=#84 id=84 data-nosnippet>84</a></span><span class="kw">pub struct </span>Operand { |
| <a href=#85 id=85 data-nosnippet>85</a> kind: OperandKind, |
| <a href=#86 id=86 data-nosnippet>86</a> <span class="comment">// FIXME : This should actually just be of type `MirSpan`. |
| <a href=#87 id=87 data-nosnippet>87</a> </span>span: <span class="prelude-ty">Option</span><MirSpan>, |
| <a href=#88 id=88 data-nosnippet>88</a>} |
| <a href=#89 id=89 data-nosnippet>89</a> |
| <a href=#90 id=90 data-nosnippet>90</a><span class="attr">#[derive(Debug, PartialEq, Eq, Clone)] |
| <a href=#91 id=91 data-nosnippet>91</a></span><span class="kw">pub enum </span>OperandKind { |
| <a href=#92 id=92 data-nosnippet>92</a> <span class="doccomment">/// Creates a value by loading the given place. |
| <a href=#93 id=93 data-nosnippet>93</a> /// |
| <a href=#94 id=94 data-nosnippet>94</a> /// Before drop elaboration, the type of the place must be `Copy`. After drop elaboration there |
| <a href=#95 id=95 data-nosnippet>95</a> /// is no such requirement. |
| <a href=#96 id=96 data-nosnippet>96</a> </span>Copy(Place), |
| <a href=#97 id=97 data-nosnippet>97</a> |
| <a href=#98 id=98 data-nosnippet>98</a> <span class="doccomment">/// Creates a value by performing loading the place, just like the `Copy` operand. |
| <a href=#99 id=99 data-nosnippet>99</a> /// |
| <a href=#100 id=100 data-nosnippet>100</a> /// This *may* additionally overwrite the place with `uninit` bytes, depending on how we decide |
| <a href=#101 id=101 data-nosnippet>101</a> /// in [UCG#188]. You should not emit MIR that may attempt a subsequent second load of this |
| <a href=#102 id=102 data-nosnippet>102</a> /// place without first re-initializing it. |
| <a href=#103 id=103 data-nosnippet>103</a> /// |
| <a href=#104 id=104 data-nosnippet>104</a> /// [UCG#188]: https://github.com/rust-lang/unsafe-code-guidelines/issues/188 |
| <a href=#105 id=105 data-nosnippet>105</a> </span>Move(Place), |
| <a href=#106 id=106 data-nosnippet>106</a> <span class="doccomment">/// Constants are already semantically values, and remain unchanged. |
| <a href=#107 id=107 data-nosnippet>107</a> </span>Constant { konst: StoredConst, ty: StoredTy }, |
| <a href=#108 id=108 data-nosnippet>108</a> <span class="doccomment">/// NON STANDARD: This kind of operand returns an immutable reference to that static memory. Rustc |
| <a href=#109 id=109 data-nosnippet>109</a> /// handles it with the `Constant` variant somehow. |
| <a href=#110 id=110 data-nosnippet>110</a> </span>Static(StaticId), |
| <a href=#111 id=111 data-nosnippet>111</a>} |
| <a href=#112 id=112 data-nosnippet>112</a> |
| <a href=#113 id=113 data-nosnippet>113</a><span class="kw">impl</span><<span class="lifetime">'db</span>> Operand { |
| <a href=#114 id=114 data-nosnippet>114</a> <span class="kw">fn </span>from_concrete_const(data: Box<[u8]>, memory_map: MemoryMap<<span class="lifetime">'db</span>>, ty: Ty<<span class="lifetime">'db</span>>) -> <span class="self">Self </span>{ |
| <a href=#115 id=115 data-nosnippet>115</a> <span class="kw">let </span>interner = DbInterner::conjure(); |
| <a href=#116 id=116 data-nosnippet>116</a> Operand { |
| <a href=#117 id=117 data-nosnippet>117</a> kind: OperandKind::Constant { |
| <a href=#118 id=118 data-nosnippet>118</a> konst: Const::new_valtree(interner, ty, data, memory_map).store(), |
| <a href=#119 id=119 data-nosnippet>119</a> ty: ty.store(), |
| <a href=#120 id=120 data-nosnippet>120</a> }, |
| <a href=#121 id=121 data-nosnippet>121</a> span: <span class="prelude-val">None</span>, |
| <a href=#122 id=122 data-nosnippet>122</a> } |
| <a href=#123 id=123 data-nosnippet>123</a> } |
| <a href=#124 id=124 data-nosnippet>124</a> |
| <a href=#125 id=125 data-nosnippet>125</a> <span class="kw">fn </span>from_bytes(data: Box<[u8]>, ty: Ty<<span class="lifetime">'db</span>>) -> <span class="self">Self </span>{ |
| <a href=#126 id=126 data-nosnippet>126</a> Operand::from_concrete_const(data, MemoryMap::default(), ty) |
| <a href=#127 id=127 data-nosnippet>127</a> } |
| <a href=#128 id=128 data-nosnippet>128</a> |
| <a href=#129 id=129 data-nosnippet>129</a> <span class="kw">fn </span>const_zst(ty: Ty<<span class="lifetime">'db</span>>) -> Operand { |
| <a href=#130 id=130 data-nosnippet>130</a> <span class="self">Self</span>::from_bytes(Box::default(), ty) |
| <a href=#131 id=131 data-nosnippet>131</a> } |
| <a href=#132 id=132 data-nosnippet>132</a> |
| <a href=#133 id=133 data-nosnippet>133</a> <span class="kw">fn </span>from_fn( |
| <a href=#134 id=134 data-nosnippet>134</a> db: <span class="kw-2">&</span><span class="lifetime">'db </span><span class="kw">dyn </span>HirDatabase, |
| <a href=#135 id=135 data-nosnippet>135</a> func_id: hir_def::FunctionId, |
| <a href=#136 id=136 data-nosnippet>136</a> generic_args: GenericArgs<<span class="lifetime">'db</span>>, |
| <a href=#137 id=137 data-nosnippet>137</a> ) -> Operand { |
| <a href=#138 id=138 data-nosnippet>138</a> <span class="kw">let </span>interner = DbInterner::new_no_crate(db); |
| <a href=#139 id=139 data-nosnippet>139</a> <span class="kw">let </span>ty = Ty::new_fn_def(interner, CallableDefId::FunctionId(func_id).into(), generic_args); |
| <a href=#140 id=140 data-nosnippet>140</a> Operand::from_bytes(Box::default(), ty) |
| <a href=#141 id=141 data-nosnippet>141</a> } |
| <a href=#142 id=142 data-nosnippet>142</a>} |
| <a href=#143 id=143 data-nosnippet>143</a> |
| <a href=#144 id=144 data-nosnippet>144</a><span class="attr">#[derive(Debug, Clone, PartialEq, Eq, Hash)] |
| <a href=#145 id=145 data-nosnippet>145</a></span><span class="kw">pub enum </span>ProjectionElem<V: PartialEq> { |
| <a href=#146 id=146 data-nosnippet>146</a> Deref, |
| <a href=#147 id=147 data-nosnippet>147</a> Field(Either<FieldId, TupleFieldId>), |
| <a href=#148 id=148 data-nosnippet>148</a> <span class="comment">// FIXME: get rid of this, and use FieldId for tuples and closures |
| <a href=#149 id=149 data-nosnippet>149</a> </span>ClosureField(usize), |
| <a href=#150 id=150 data-nosnippet>150</a> Index(V), |
| <a href=#151 id=151 data-nosnippet>151</a> ConstantIndex { offset: u64, from_end: bool }, |
| <a href=#152 id=152 data-nosnippet>152</a> Subslice { from: u64, to: u64 }, |
| <a href=#153 id=153 data-nosnippet>153</a> <span class="comment">//Downcast(Option<Symbol>, VariantIdx), |
| <a href=#154 id=154 data-nosnippet>154</a> </span>OpaqueCast(StoredTy), |
| <a href=#155 id=155 data-nosnippet>155</a>} |
| <a href=#156 id=156 data-nosnippet>156</a> |
| <a href=#157 id=157 data-nosnippet>157</a><span class="kw">impl</span><V: PartialEq> ProjectionElem<V> { |
| <a href=#158 id=158 data-nosnippet>158</a> <span class="kw">pub fn </span>projected_ty<<span class="lifetime">'db</span>>( |
| <a href=#159 id=159 data-nosnippet>159</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#160 id=160 data-nosnippet>160</a> infcx: <span class="kw-2">&</span>InferCtxt<<span class="lifetime">'db</span>>, |
| <a href=#161 id=161 data-nosnippet>161</a> env: ParamEnv<<span class="lifetime">'db</span>>, |
| <a href=#162 id=162 data-nosnippet>162</a> <span class="kw-2">mut </span>base: Ty<<span class="lifetime">'db</span>>, |
| <a href=#163 id=163 data-nosnippet>163</a> closure_field: <span class="kw">impl </span>FnOnce(InternedClosureId, GenericArgs<<span class="lifetime">'db</span>>, usize) -> Ty<<span class="lifetime">'db</span>>, |
| <a href=#164 id=164 data-nosnippet>164</a> krate: Crate, |
| <a href=#165 id=165 data-nosnippet>165</a> ) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#166 id=166 data-nosnippet>166</a> <span class="kw">let </span>interner = infcx.interner; |
| <a href=#167 id=167 data-nosnippet>167</a> <span class="kw">let </span>db = interner.db; |
| <a href=#168 id=168 data-nosnippet>168</a> |
| <a href=#169 id=169 data-nosnippet>169</a> <span class="comment">// we only bail on mir building when there are type mismatches |
| <a href=#170 id=170 data-nosnippet>170</a> // but error types may pop up resulting in us still attempting to build the mir |
| <a href=#171 id=171 data-nosnippet>171</a> // so just propagate the error type |
| <a href=#172 id=172 data-nosnippet>172</a> </span><span class="kw">if </span>base.is_ty_error() { |
| <a href=#173 id=173 data-nosnippet>173</a> <span class="kw">return </span>Ty::new_error(interner, ErrorGuaranteed); |
| <a href=#174 id=174 data-nosnippet>174</a> } |
| <a href=#175 id=175 data-nosnippet>175</a> |
| <a href=#176 id=176 data-nosnippet>176</a> <span class="kw">if </span><span class="macro">matches!</span>(base.kind(), TyKind::Alias(..)) { |
| <a href=#177 id=177 data-nosnippet>177</a> <span class="kw">let </span><span class="kw-2">mut </span>ocx = ObligationCtxt::new(infcx); |
| <a href=#178 id=178 data-nosnippet>178</a> <span class="kw">match </span>ocx.structurally_normalize_ty(<span class="kw-2">&</span>ObligationCause::dummy(), env, base) { |
| <a href=#179 id=179 data-nosnippet>179</a> <span class="prelude-val">Ok</span>(it) => base = it, |
| <a href=#180 id=180 data-nosnippet>180</a> <span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="kw">return </span>Ty::new_error(interner, ErrorGuaranteed), |
| <a href=#181 id=181 data-nosnippet>181</a> } |
| <a href=#182 id=182 data-nosnippet>182</a> } |
| <a href=#183 id=183 data-nosnippet>183</a> |
| <a href=#184 id=184 data-nosnippet>184</a> <span class="kw">match </span><span class="self">self </span>{ |
| <a href=#185 id=185 data-nosnippet>185</a> ProjectionElem::Deref => <span class="kw">match </span>base.kind() { |
| <a href=#186 id=186 data-nosnippet>186</a> TyKind::RawPtr(inner, <span class="kw">_</span>) | TyKind::Ref(<span class="kw">_</span>, inner, <span class="kw">_</span>) => inner, |
| <a href=#187 id=187 data-nosnippet>187</a> TyKind::Adt(adt_def, subst) <span class="kw">if </span>adt_def.is_box() => subst.type_at(<span class="number">0</span>), |
| <a href=#188 id=188 data-nosnippet>188</a> <span class="kw">_ </span>=> { |
| <a href=#189 id=189 data-nosnippet>189</a> <span class="macro">never!</span>( |
| <a href=#190 id=190 data-nosnippet>190</a> <span class="string">"Overloaded deref on type {} is not a projection"</span>, |
| <a href=#191 id=191 data-nosnippet>191</a> base.display(db, DisplayTarget::from_crate(db, krate)) |
| <a href=#192 id=192 data-nosnippet>192</a> ); |
| <a href=#193 id=193 data-nosnippet>193</a> Ty::new_error(interner, ErrorGuaranteed) |
| <a href=#194 id=194 data-nosnippet>194</a> } |
| <a href=#195 id=195 data-nosnippet>195</a> }, |
| <a href=#196 id=196 data-nosnippet>196</a> ProjectionElem::Field(Either::Left(f)) => <span class="kw">match </span>base.kind() { |
| <a href=#197 id=197 data-nosnippet>197</a> TyKind::Adt(<span class="kw">_</span>, subst) => { |
| <a href=#198 id=198 data-nosnippet>198</a> db.field_types(f.parent)[f.local_id].get().instantiate(interner, subst) |
| <a href=#199 id=199 data-nosnippet>199</a> } |
| <a href=#200 id=200 data-nosnippet>200</a> ty => { |
| <a href=#201 id=201 data-nosnippet>201</a> <span class="macro">never!</span>(<span class="string">"Only adt has field, found {:?}"</span>, ty); |
| <a href=#202 id=202 data-nosnippet>202</a> Ty::new_error(interner, ErrorGuaranteed) |
| <a href=#203 id=203 data-nosnippet>203</a> } |
| <a href=#204 id=204 data-nosnippet>204</a> }, |
| <a href=#205 id=205 data-nosnippet>205</a> ProjectionElem::Field(Either::Right(f)) => <span class="kw">match </span>base.kind() { |
| <a href=#206 id=206 data-nosnippet>206</a> TyKind::Tuple(subst) => { |
| <a href=#207 id=207 data-nosnippet>207</a> subst.as_slice().get(f.index <span class="kw">as </span>usize).copied().unwrap_or_else(|| { |
| <a href=#208 id=208 data-nosnippet>208</a> <span class="macro">never!</span>(<span class="string">"Out of bound tuple field"</span>); |
| <a href=#209 id=209 data-nosnippet>209</a> Ty::new_error(interner, ErrorGuaranteed) |
| <a href=#210 id=210 data-nosnippet>210</a> }) |
| <a href=#211 id=211 data-nosnippet>211</a> } |
| <a href=#212 id=212 data-nosnippet>212</a> ty => { |
| <a href=#213 id=213 data-nosnippet>213</a> <span class="macro">never!</span>(<span class="string">"Only tuple has tuple field: {:?}"</span>, ty); |
| <a href=#214 id=214 data-nosnippet>214</a> Ty::new_error(interner, ErrorGuaranteed) |
| <a href=#215 id=215 data-nosnippet>215</a> } |
| <a href=#216 id=216 data-nosnippet>216</a> }, |
| <a href=#217 id=217 data-nosnippet>217</a> ProjectionElem::ClosureField(f) => <span class="kw">match </span>base.kind() { |
| <a href=#218 id=218 data-nosnippet>218</a> TyKind::Closure(id, subst) => closure_field(id.<span class="number">0</span>, subst, <span class="kw-2">*</span>f), |
| <a href=#219 id=219 data-nosnippet>219</a> <span class="kw">_ </span>=> { |
| <a href=#220 id=220 data-nosnippet>220</a> <span class="macro">never!</span>(<span class="string">"Only closure has closure field"</span>); |
| <a href=#221 id=221 data-nosnippet>221</a> Ty::new_error(interner, ErrorGuaranteed) |
| <a href=#222 id=222 data-nosnippet>222</a> } |
| <a href=#223 id=223 data-nosnippet>223</a> }, |
| <a href=#224 id=224 data-nosnippet>224</a> ProjectionElem::ConstantIndex { .. } | ProjectionElem::Index(<span class="kw">_</span>) => <span class="kw">match </span>base.kind() { |
| <a href=#225 id=225 data-nosnippet>225</a> TyKind::Array(inner, <span class="kw">_</span>) | TyKind::Slice(inner) => inner, |
| <a href=#226 id=226 data-nosnippet>226</a> <span class="kw">_ </span>=> { |
| <a href=#227 id=227 data-nosnippet>227</a> <span class="macro">never!</span>(<span class="string">"Overloaded index is not a projection"</span>); |
| <a href=#228 id=228 data-nosnippet>228</a> Ty::new_error(interner, ErrorGuaranteed) |
| <a href=#229 id=229 data-nosnippet>229</a> } |
| <a href=#230 id=230 data-nosnippet>230</a> }, |
| <a href=#231 id=231 data-nosnippet>231</a> <span class="kw-2">&</span>ProjectionElem::Subslice { from, to } => <span class="kw">match </span>base.kind() { |
| <a href=#232 id=232 data-nosnippet>232</a> TyKind::Array(inner, c) => { |
| <a href=#233 id=233 data-nosnippet>233</a> <span class="kw">let </span>next_c = usize_const( |
| <a href=#234 id=234 data-nosnippet>234</a> db, |
| <a href=#235 id=235 data-nosnippet>235</a> <span class="kw">match </span>try_const_usize(db, c) { |
| <a href=#236 id=236 data-nosnippet>236</a> <span class="prelude-val">None </span>=> <span class="prelude-val">None</span>, |
| <a href=#237 id=237 data-nosnippet>237</a> <span class="prelude-val">Some</span>(x) => x.checked_sub(u128::from(from + to)), |
| <a href=#238 id=238 data-nosnippet>238</a> }, |
| <a href=#239 id=239 data-nosnippet>239</a> krate, |
| <a href=#240 id=240 data-nosnippet>240</a> ); |
| <a href=#241 id=241 data-nosnippet>241</a> Ty::new_array_with_const_len(interner, inner, next_c) |
| <a href=#242 id=242 data-nosnippet>242</a> } |
| <a href=#243 id=243 data-nosnippet>243</a> TyKind::Slice(<span class="kw">_</span>) => base, |
| <a href=#244 id=244 data-nosnippet>244</a> <span class="kw">_ </span>=> { |
| <a href=#245 id=245 data-nosnippet>245</a> <span class="macro">never!</span>(<span class="string">"Subslice projection should only happen on slice and array"</span>); |
| <a href=#246 id=246 data-nosnippet>246</a> Ty::new_error(interner, ErrorGuaranteed) |
| <a href=#247 id=247 data-nosnippet>247</a> } |
| <a href=#248 id=248 data-nosnippet>248</a> }, |
| <a href=#249 id=249 data-nosnippet>249</a> ProjectionElem::OpaqueCast(<span class="kw">_</span>) => { |
| <a href=#250 id=250 data-nosnippet>250</a> <span class="macro">never!</span>(<span class="string">"We don't emit these yet"</span>); |
| <a href=#251 id=251 data-nosnippet>251</a> Ty::new_error(interner, ErrorGuaranteed) |
| <a href=#252 id=252 data-nosnippet>252</a> } |
| <a href=#253 id=253 data-nosnippet>253</a> } |
| <a href=#254 id=254 data-nosnippet>254</a> } |
| <a href=#255 id=255 data-nosnippet>255</a>} |
| <a href=#256 id=256 data-nosnippet>256</a> |
| <a href=#257 id=257 data-nosnippet>257</a><span class="kw">type </span>PlaceElem = ProjectionElem<LocalId>; |
| <a href=#258 id=258 data-nosnippet>258</a> |
| <a href=#259 id=259 data-nosnippet>259</a><span class="attr">#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] |
| <a href=#260 id=260 data-nosnippet>260</a></span><span class="kw">pub struct </span>ProjectionId(u32); |
| <a href=#261 id=261 data-nosnippet>261</a> |
| <a href=#262 id=262 data-nosnippet>262</a><span class="attr">#[derive(Debug, Clone, PartialEq, Eq)] |
| <a href=#263 id=263 data-nosnippet>263</a></span><span class="kw">pub struct </span>ProjectionStore { |
| <a href=#264 id=264 data-nosnippet>264</a> id_to_proj: FxHashMap<ProjectionId, Box<[PlaceElem]>>, |
| <a href=#265 id=265 data-nosnippet>265</a> proj_to_id: FxHashMap<Box<[PlaceElem]>, ProjectionId>, |
| <a href=#266 id=266 data-nosnippet>266</a>} |
| <a href=#267 id=267 data-nosnippet>267</a> |
| <a href=#268 id=268 data-nosnippet>268</a><span class="kw">impl </span>Default <span class="kw">for </span>ProjectionStore { |
| <a href=#269 id=269 data-nosnippet>269</a> <span class="kw">fn </span>default() -> <span class="self">Self </span>{ |
| <a href=#270 id=270 data-nosnippet>270</a> <span class="kw">let </span><span class="kw-2">mut </span>this = <span class="self">Self </span>{ id_to_proj: Default::default(), proj_to_id: Default::default() }; |
| <a href=#271 id=271 data-nosnippet>271</a> <span class="comment">// Ensure that [] will get the id 0 which is used in `ProjectionId::Empty` |
| <a href=#272 id=272 data-nosnippet>272</a> </span>this.intern(Box::new([])); |
| <a href=#273 id=273 data-nosnippet>273</a> this |
| <a href=#274 id=274 data-nosnippet>274</a> } |
| <a href=#275 id=275 data-nosnippet>275</a>} |
| <a href=#276 id=276 data-nosnippet>276</a> |
| <a href=#277 id=277 data-nosnippet>277</a><span class="kw">impl </span>ProjectionStore { |
| <a href=#278 id=278 data-nosnippet>278</a> <span class="kw">pub fn </span>shrink_to_fit(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <a href=#279 id=279 data-nosnippet>279</a> <span class="self">self</span>.id_to_proj.shrink_to_fit(); |
| <a href=#280 id=280 data-nosnippet>280</a> <span class="self">self</span>.proj_to_id.shrink_to_fit(); |
| <a href=#281 id=281 data-nosnippet>281</a> } |
| <a href=#282 id=282 data-nosnippet>282</a> |
| <a href=#283 id=283 data-nosnippet>283</a> <span class="kw">pub fn </span>intern_if_exist(<span class="kw-2">&</span><span class="self">self</span>, projection: <span class="kw-2">&</span>[PlaceElem]) -> <span class="prelude-ty">Option</span><ProjectionId> { |
| <a href=#284 id=284 data-nosnippet>284</a> <span class="self">self</span>.proj_to_id.get(projection).copied() |
| <a href=#285 id=285 data-nosnippet>285</a> } |
| <a href=#286 id=286 data-nosnippet>286</a> |
| <a href=#287 id=287 data-nosnippet>287</a> <span class="kw">pub fn </span>intern(<span class="kw-2">&mut </span><span class="self">self</span>, projection: Box<[PlaceElem]>) -> ProjectionId { |
| <a href=#288 id=288 data-nosnippet>288</a> <span class="kw">let </span>new_id = ProjectionId(<span class="self">self</span>.proj_to_id.len() <span class="kw">as </span>u32); |
| <a href=#289 id=289 data-nosnippet>289</a> <span class="kw">match </span><span class="self">self</span>.proj_to_id.entry(projection) { |
| <a href=#290 id=290 data-nosnippet>290</a> Entry::Occupied(id) => <span class="kw-2">*</span>id.get(), |
| <a href=#291 id=291 data-nosnippet>291</a> Entry::Vacant(e) => { |
| <a href=#292 id=292 data-nosnippet>292</a> <span class="kw">let </span>key_clone = e.key().clone(); |
| <a href=#293 id=293 data-nosnippet>293</a> e.insert(new_id); |
| <a href=#294 id=294 data-nosnippet>294</a> <span class="self">self</span>.id_to_proj.insert(new_id, key_clone); |
| <a href=#295 id=295 data-nosnippet>295</a> new_id |
| <a href=#296 id=296 data-nosnippet>296</a> } |
| <a href=#297 id=297 data-nosnippet>297</a> } |
| <a href=#298 id=298 data-nosnippet>298</a> } |
| <a href=#299 id=299 data-nosnippet>299</a>} |
| <a href=#300 id=300 data-nosnippet>300</a> |
| <a href=#301 id=301 data-nosnippet>301</a><span class="kw">impl </span>ProjectionId { |
| <a href=#302 id=302 data-nosnippet>302</a> <span class="kw">pub const </span>EMPTY: ProjectionId = ProjectionId(<span class="number">0</span>); |
| <a href=#303 id=303 data-nosnippet>303</a> |
| <a href=#304 id=304 data-nosnippet>304</a> <span class="kw">pub fn </span>is_empty(<span class="self">self</span>) -> bool { |
| <a href=#305 id=305 data-nosnippet>305</a> <span class="self">self </span>== ProjectionId::EMPTY |
| <a href=#306 id=306 data-nosnippet>306</a> } |
| <a href=#307 id=307 data-nosnippet>307</a> |
| <a href=#308 id=308 data-nosnippet>308</a> <span class="kw">pub fn </span>lookup(<span class="self">self</span>, store: <span class="kw-2">&</span>ProjectionStore) -> <span class="kw-2">&</span>[PlaceElem] { |
| <a href=#309 id=309 data-nosnippet>309</a> store.id_to_proj.get(<span class="kw-2">&</span><span class="self">self</span>).unwrap() |
| <a href=#310 id=310 data-nosnippet>310</a> } |
| <a href=#311 id=311 data-nosnippet>311</a> |
| <a href=#312 id=312 data-nosnippet>312</a> <span class="kw">pub fn </span>project(<span class="self">self</span>, projection: PlaceElem, store: <span class="kw-2">&mut </span>ProjectionStore) -> ProjectionId { |
| <a href=#313 id=313 data-nosnippet>313</a> <span class="kw">let </span><span class="kw-2">mut </span>current = <span class="self">self</span>.lookup(store).to_vec(); |
| <a href=#314 id=314 data-nosnippet>314</a> current.push(projection); |
| <a href=#315 id=315 data-nosnippet>315</a> store.intern(current.into()) |
| <a href=#316 id=316 data-nosnippet>316</a> } |
| <a href=#317 id=317 data-nosnippet>317</a>} |
| <a href=#318 id=318 data-nosnippet>318</a> |
| <a href=#319 id=319 data-nosnippet>319</a><span class="attr">#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] |
| <a href=#320 id=320 data-nosnippet>320</a></span><span class="kw">pub struct </span>Place { |
| <a href=#321 id=321 data-nosnippet>321</a> <span class="kw">pub </span>local: LocalId, |
| <a href=#322 id=322 data-nosnippet>322</a> <span class="kw">pub </span>projection: ProjectionId, |
| <a href=#323 id=323 data-nosnippet>323</a>} |
| <a href=#324 id=324 data-nosnippet>324</a> |
| <a href=#325 id=325 data-nosnippet>325</a><span class="kw">impl </span>Place { |
| <a href=#326 id=326 data-nosnippet>326</a> <span class="kw">fn </span>is_parent(<span class="kw-2">&</span><span class="self">self</span>, child: <span class="kw-2">&</span>Place, store: <span class="kw-2">&</span>ProjectionStore) -> bool { |
| <a href=#327 id=327 data-nosnippet>327</a> <span class="self">self</span>.local == child.local |
| <a href=#328 id=328 data-nosnippet>328</a> && child.projection.lookup(store).starts_with(<span class="self">self</span>.projection.lookup(store)) |
| <a href=#329 id=329 data-nosnippet>329</a> } |
| <a href=#330 id=330 data-nosnippet>330</a> |
| <a href=#331 id=331 data-nosnippet>331</a> <span class="doccomment">/// The place itself is not included |
| <a href=#332 id=332 data-nosnippet>332</a> </span><span class="kw">fn </span>iterate_over_parents<<span class="lifetime">'a</span>>( |
| <a href=#333 id=333 data-nosnippet>333</a> <span class="kw-2">&</span><span class="lifetime">'a </span><span class="self">self</span>, |
| <a href=#334 id=334 data-nosnippet>334</a> store: <span class="kw-2">&</span><span class="lifetime">'a </span>ProjectionStore, |
| <a href=#335 id=335 data-nosnippet>335</a> ) -> <span class="kw">impl </span>Iterator<Item = Place> + <span class="lifetime">'a </span>{ |
| <a href=#336 id=336 data-nosnippet>336</a> <span class="kw">let </span>projection = <span class="self">self</span>.projection.lookup(store); |
| <a href=#337 id=337 data-nosnippet>337</a> (<span class="number">0</span>..projection.len()).map(|x| <span class="kw-2">&</span>projection[<span class="number">0</span>..x]).filter_map(<span class="kw">move </span>|x| { |
| <a href=#338 id=338 data-nosnippet>338</a> <span class="prelude-val">Some</span>(Place { local: <span class="self">self</span>.local, projection: store.intern_if_exist(x)<span class="question-mark">? </span>}) |
| <a href=#339 id=339 data-nosnippet>339</a> }) |
| <a href=#340 id=340 data-nosnippet>340</a> } |
| <a href=#341 id=341 data-nosnippet>341</a> |
| <a href=#342 id=342 data-nosnippet>342</a> <span class="kw">fn </span>project(<span class="kw-2">&</span><span class="self">self</span>, projection: PlaceElem, store: <span class="kw-2">&mut </span>ProjectionStore) -> Place { |
| <a href=#343 id=343 data-nosnippet>343</a> Place { local: <span class="self">self</span>.local, projection: <span class="self">self</span>.projection.project(projection, store) } |
| <a href=#344 id=344 data-nosnippet>344</a> } |
| <a href=#345 id=345 data-nosnippet>345</a>} |
| <a href=#346 id=346 data-nosnippet>346</a> |
| <a href=#347 id=347 data-nosnippet>347</a><span class="kw">impl </span>From<LocalId> <span class="kw">for </span>Place { |
| <a href=#348 id=348 data-nosnippet>348</a> <span class="kw">fn </span>from(local: LocalId) -> <span class="self">Self </span>{ |
| <a href=#349 id=349 data-nosnippet>349</a> <span class="self">Self </span>{ local, projection: ProjectionId::EMPTY } |
| <a href=#350 id=350 data-nosnippet>350</a> } |
| <a href=#351 id=351 data-nosnippet>351</a>} |
| <a href=#352 id=352 data-nosnippet>352</a> |
| <a href=#353 id=353 data-nosnippet>353</a><span class="attr">#[derive(Debug, PartialEq, Eq, Clone)] |
| <a href=#354 id=354 data-nosnippet>354</a></span><span class="kw">pub enum </span>AggregateKind { |
| <a href=#355 id=355 data-nosnippet>355</a> <span class="doccomment">/// The type is of the element |
| <a href=#356 id=356 data-nosnippet>356</a> </span>Array(StoredTy), |
| <a href=#357 id=357 data-nosnippet>357</a> <span class="doccomment">/// The type is of the tuple |
| <a href=#358 id=358 data-nosnippet>358</a> </span>Tuple(StoredTy), |
| <a href=#359 id=359 data-nosnippet>359</a> Adt(VariantId, StoredGenericArgs), |
| <a href=#360 id=360 data-nosnippet>360</a> Union(UnionId, FieldId), |
| <a href=#361 id=361 data-nosnippet>361</a> Closure(StoredTy), |
| <a href=#362 id=362 data-nosnippet>362</a> <span class="comment">//Coroutine(LocalDefId, SubstsRef, Movability), |
| <a href=#363 id=363 data-nosnippet>363</a></span>} |
| <a href=#364 id=364 data-nosnippet>364</a> |
| <a href=#365 id=365 data-nosnippet>365</a><span class="attr">#[derive(Debug, Clone, Hash, PartialEq, Eq)] |
| <a href=#366 id=366 data-nosnippet>366</a></span><span class="kw">pub struct </span>SwitchTargets { |
| <a href=#367 id=367 data-nosnippet>367</a> <span class="doccomment">/// Possible values. The locations to branch to in each case |
| <a href=#368 id=368 data-nosnippet>368</a> /// are found in the corresponding indices from the `targets` vector. |
| <a href=#369 id=369 data-nosnippet>369</a> </span>values: SmallVec<[u128; <span class="number">1</span>]>, |
| <a href=#370 id=370 data-nosnippet>370</a> |
| <a href=#371 id=371 data-nosnippet>371</a> <span class="doccomment">/// Possible branch sites. The last element of this vector is used |
| <a href=#372 id=372 data-nosnippet>372</a> /// for the otherwise branch, so targets.len() == values.len() + 1 |
| <a href=#373 id=373 data-nosnippet>373</a> /// should hold. |
| <a href=#374 id=374 data-nosnippet>374</a> </span><span class="comment">// |
| <a href=#375 id=375 data-nosnippet>375</a> // This invariant is quite non-obvious and also could be improved. |
| <a href=#376 id=376 data-nosnippet>376</a> // One way to make this invariant is to have something like this instead: |
| <a href=#377 id=377 data-nosnippet>377</a> // |
| <a href=#378 id=378 data-nosnippet>378</a> // branches: Vec<(ConstInt, BasicBlock)>, |
| <a href=#379 id=379 data-nosnippet>379</a> // otherwise: Option<BasicBlock> // exhaustive if None |
| <a href=#380 id=380 data-nosnippet>380</a> // |
| <a href=#381 id=381 data-nosnippet>381</a> // However we’ve decided to keep this as-is until we figure a case |
| <a href=#382 id=382 data-nosnippet>382</a> // where some other approach seems to be strictly better than other. |
| <a href=#383 id=383 data-nosnippet>383</a> </span>targets: SmallVec<[BasicBlockId; <span class="number">2</span>]>, |
| <a href=#384 id=384 data-nosnippet>384</a>} |
| <a href=#385 id=385 data-nosnippet>385</a> |
| <a href=#386 id=386 data-nosnippet>386</a><span class="kw">impl </span>SwitchTargets { |
| <a href=#387 id=387 data-nosnippet>387</a> <span class="doccomment">/// Creates switch targets from an iterator of values and target blocks. |
| <a href=#388 id=388 data-nosnippet>388</a> /// |
| <a href=#389 id=389 data-nosnippet>389</a> /// The iterator may be empty, in which case the `SwitchInt` instruction is equivalent to |
| <a href=#390 id=390 data-nosnippet>390</a> /// `goto otherwise;`. |
| <a href=#391 id=391 data-nosnippet>391</a> </span><span class="kw">pub fn </span>new( |
| <a href=#392 id=392 data-nosnippet>392</a> targets: <span class="kw">impl </span>Iterator<Item = (u128, BasicBlockId)>, |
| <a href=#393 id=393 data-nosnippet>393</a> otherwise: BasicBlockId, |
| <a href=#394 id=394 data-nosnippet>394</a> ) -> <span class="self">Self </span>{ |
| <a href=#395 id=395 data-nosnippet>395</a> <span class="kw">let </span>(values, <span class="kw-2">mut </span>targets): (SmallVec<<span class="kw">_</span>>, SmallVec<<span class="kw">_</span>>) = targets.unzip(); |
| <a href=#396 id=396 data-nosnippet>396</a> targets.push(otherwise); |
| <a href=#397 id=397 data-nosnippet>397</a> <span class="self">Self </span>{ values, targets } |
| <a href=#398 id=398 data-nosnippet>398</a> } |
| <a href=#399 id=399 data-nosnippet>399</a> |
| <a href=#400 id=400 data-nosnippet>400</a> <span class="doccomment">/// Builds a switch targets definition that jumps to `then` if the tested value equals `value`, |
| <a href=#401 id=401 data-nosnippet>401</a> /// and to `else_` if not. |
| <a href=#402 id=402 data-nosnippet>402</a> </span><span class="kw">pub fn </span>static_if(value: u128, then: BasicBlockId, else_: BasicBlockId) -> <span class="self">Self </span>{ |
| <a href=#403 id=403 data-nosnippet>403</a> <span class="self">Self </span>{ values: <span class="macro">smallvec!</span>[value], targets: <span class="macro">smallvec!</span>[then, else_] } |
| <a href=#404 id=404 data-nosnippet>404</a> } |
| <a href=#405 id=405 data-nosnippet>405</a> |
| <a href=#406 id=406 data-nosnippet>406</a> <span class="doccomment">/// Returns the fallback target that is jumped to when none of the values match the operand. |
| <a href=#407 id=407 data-nosnippet>407</a> </span><span class="kw">pub fn </span>otherwise(<span class="kw-2">&</span><span class="self">self</span>) -> BasicBlockId { |
| <a href=#408 id=408 data-nosnippet>408</a> <span class="kw-2">*</span><span class="self">self</span>.targets.last().unwrap() |
| <a href=#409 id=409 data-nosnippet>409</a> } |
| <a href=#410 id=410 data-nosnippet>410</a> |
| <a href=#411 id=411 data-nosnippet>411</a> <span class="doccomment">/// Returns an iterator over the switch targets. |
| <a href=#412 id=412 data-nosnippet>412</a> /// |
| <a href=#413 id=413 data-nosnippet>413</a> /// The iterator will yield tuples containing the value and corresponding target to jump to, not |
| <a href=#414 id=414 data-nosnippet>414</a> /// including the `otherwise` fallback target. |
| <a href=#415 id=415 data-nosnippet>415</a> /// |
| <a href=#416 id=416 data-nosnippet>416</a> /// Note that this may yield 0 elements. Only the `otherwise` branch is mandatory. |
| <a href=#417 id=417 data-nosnippet>417</a> </span><span class="kw">pub fn </span>iter(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw">impl </span>Iterator<Item = (u128, BasicBlockId)> + <span class="lifetime">'_ </span>{ |
| <a href=#418 id=418 data-nosnippet>418</a> iter::zip(<span class="kw-2">&</span><span class="self">self</span>.values, <span class="kw-2">&</span><span class="self">self</span>.targets).map(|(x, y)| (<span class="kw-2">*</span>x, <span class="kw-2">*</span>y)) |
| <a href=#419 id=419 data-nosnippet>419</a> } |
| <a href=#420 id=420 data-nosnippet>420</a> |
| <a href=#421 id=421 data-nosnippet>421</a> <span class="doccomment">/// Returns a slice with all possible jump targets (including the fallback target). |
| <a href=#422 id=422 data-nosnippet>422</a> </span><span class="kw">pub fn </span>all_targets(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>[BasicBlockId] { |
| <a href=#423 id=423 data-nosnippet>423</a> <span class="kw-2">&</span><span class="self">self</span>.targets |
| <a href=#424 id=424 data-nosnippet>424</a> } |
| <a href=#425 id=425 data-nosnippet>425</a> |
| <a href=#426 id=426 data-nosnippet>426</a> <span class="doccomment">/// Finds the `BasicBlock` to which this `SwitchInt` will branch given the |
| <a href=#427 id=427 data-nosnippet>427</a> /// specific value. This cannot fail, as it'll return the `otherwise` |
| <a href=#428 id=428 data-nosnippet>428</a> /// branch if there's not a specific match for the value. |
| <a href=#429 id=429 data-nosnippet>429</a> </span><span class="kw">pub fn </span>target_for_value(<span class="kw-2">&</span><span class="self">self</span>, value: u128) -> BasicBlockId { |
| <a href=#430 id=430 data-nosnippet>430</a> <span class="self">self</span>.iter().find_map(|(v, t)| (v == value).then_some(t)).unwrap_or_else(|| <span class="self">self</span>.otherwise()) |
| <a href=#431 id=431 data-nosnippet>431</a> } |
| <a href=#432 id=432 data-nosnippet>432</a>} |
| <a href=#433 id=433 data-nosnippet>433</a> |
| <a href=#434 id=434 data-nosnippet>434</a><span class="attr">#[derive(Debug, PartialEq, Eq, Clone)] |
| <a href=#435 id=435 data-nosnippet>435</a></span><span class="kw">pub struct </span>Terminator { |
| <a href=#436 id=436 data-nosnippet>436</a> <span class="kw">pub </span>span: MirSpan, |
| <a href=#437 id=437 data-nosnippet>437</a> <span class="kw">pub </span>kind: TerminatorKind, |
| <a href=#438 id=438 data-nosnippet>438</a>} |
| <a href=#439 id=439 data-nosnippet>439</a> |
| <a href=#440 id=440 data-nosnippet>440</a><span class="attr">#[derive(Debug, PartialEq, Eq, Clone)] |
| <a href=#441 id=441 data-nosnippet>441</a></span><span class="kw">pub enum </span>TerminatorKind { |
| <a href=#442 id=442 data-nosnippet>442</a> <span class="doccomment">/// Block has one successor; we continue execution there. |
| <a href=#443 id=443 data-nosnippet>443</a> </span>Goto { target: BasicBlockId }, |
| <a href=#444 id=444 data-nosnippet>444</a> |
| <a href=#445 id=445 data-nosnippet>445</a> <span class="doccomment">/// Switches based on the computed value. |
| <a href=#446 id=446 data-nosnippet>446</a> /// |
| <a href=#447 id=447 data-nosnippet>447</a> /// First, evaluates the `discr` operand. The type of the operand must be a signed or unsigned |
| <a href=#448 id=448 data-nosnippet>448</a> /// integer, char, or bool, and must match the given type. Then, if the list of switch targets |
| <a href=#449 id=449 data-nosnippet>449</a> /// contains the computed value, continues execution at the associated basic block. Otherwise, |
| <a href=#450 id=450 data-nosnippet>450</a> /// continues execution at the "otherwise" basic block. |
| <a href=#451 id=451 data-nosnippet>451</a> /// |
| <a href=#452 id=452 data-nosnippet>452</a> /// Target values may not appear more than once. |
| <a href=#453 id=453 data-nosnippet>453</a> </span>SwitchInt { |
| <a href=#454 id=454 data-nosnippet>454</a> <span class="doccomment">/// The discriminant value being tested. |
| <a href=#455 id=455 data-nosnippet>455</a> </span>discr: Operand, |
| <a href=#456 id=456 data-nosnippet>456</a> |
| <a href=#457 id=457 data-nosnippet>457</a> targets: SwitchTargets, |
| <a href=#458 id=458 data-nosnippet>458</a> }, |
| <a href=#459 id=459 data-nosnippet>459</a> |
| <a href=#460 id=460 data-nosnippet>460</a> <span class="doccomment">/// Indicates that the landing pad is finished and that the process should continue unwinding. |
| <a href=#461 id=461 data-nosnippet>461</a> /// |
| <a href=#462 id=462 data-nosnippet>462</a> /// Like a return, this marks the end of this invocation of the function. |
| <a href=#463 id=463 data-nosnippet>463</a> /// |
| <a href=#464 id=464 data-nosnippet>464</a> /// Only permitted in cleanup blocks. `Resume` is not permitted with `-C unwind=abort` after |
| <a href=#465 id=465 data-nosnippet>465</a> /// deaggregation runs. |
| <a href=#466 id=466 data-nosnippet>466</a> </span>UnwindResume, |
| <a href=#467 id=467 data-nosnippet>467</a> |
| <a href=#468 id=468 data-nosnippet>468</a> <span class="doccomment">/// Indicates that the landing pad is finished and that the process should abort. |
| <a href=#469 id=469 data-nosnippet>469</a> /// |
| <a href=#470 id=470 data-nosnippet>470</a> /// Used to prevent unwinding for foreign items or with `-C unwind=abort`. Only permitted in |
| <a href=#471 id=471 data-nosnippet>471</a> /// cleanup blocks. |
| <a href=#472 id=472 data-nosnippet>472</a> </span>Abort, |
| <a href=#473 id=473 data-nosnippet>473</a> |
| <a href=#474 id=474 data-nosnippet>474</a> <span class="doccomment">/// Returns from the function. |
| <a href=#475 id=475 data-nosnippet>475</a> /// |
| <a href=#476 id=476 data-nosnippet>476</a> /// Like function calls, the exact semantics of returns in Rust are unclear. Returning very |
| <a href=#477 id=477 data-nosnippet>477</a> /// likely at least assigns the value currently in the return place (`_0`) to the place |
| <a href=#478 id=478 data-nosnippet>478</a> /// specified in the associated `Call` terminator in the calling function, as if assigned via |
| <a href=#479 id=479 data-nosnippet>479</a> /// `dest = move _0`. It might additionally do other things, like have side-effects in the |
| <a href=#480 id=480 data-nosnippet>480</a> /// aliasing model. |
| <a href=#481 id=481 data-nosnippet>481</a> /// |
| <a href=#482 id=482 data-nosnippet>482</a> /// If the body is a coroutine body, this has slightly different semantics; it instead causes a |
| <a href=#483 id=483 data-nosnippet>483</a> /// `CoroutineState::Returned(_0)` to be created (as if by an `Aggregate` rvalue) and assigned |
| <a href=#484 id=484 data-nosnippet>484</a> /// to the return place. |
| <a href=#485 id=485 data-nosnippet>485</a> </span>Return, |
| <a href=#486 id=486 data-nosnippet>486</a> |
| <a href=#487 id=487 data-nosnippet>487</a> <span class="doccomment">/// Indicates a terminator that can never be reached. |
| <a href=#488 id=488 data-nosnippet>488</a> /// |
| <a href=#489 id=489 data-nosnippet>489</a> /// Executing this terminator is UB. |
| <a href=#490 id=490 data-nosnippet>490</a> </span>Unreachable, |
| <a href=#491 id=491 data-nosnippet>491</a> |
| <a href=#492 id=492 data-nosnippet>492</a> <span class="doccomment">/// The behavior of this statement differs significantly before and after drop elaboration. |
| <a href=#493 id=493 data-nosnippet>493</a> /// After drop elaboration, `Drop` executes the drop glue for the specified place, after which |
| <a href=#494 id=494 data-nosnippet>494</a> /// it continues execution/unwinds at the given basic blocks. It is possible that executing drop |
| <a href=#495 id=495 data-nosnippet>495</a> /// glue is special - this would be part of Rust's memory model. (**FIXME**: due we have an |
| <a href=#496 id=496 data-nosnippet>496</a> /// issue tracking if drop glue has any interesting semantics in addition to those of a function |
| <a href=#497 id=497 data-nosnippet>497</a> /// call?) |
| <a href=#498 id=498 data-nosnippet>498</a> /// |
| <a href=#499 id=499 data-nosnippet>499</a> /// `Drop` before drop elaboration is a *conditional* execution of the drop glue. Specifically, the |
| <a href=#500 id=500 data-nosnippet>500</a> /// `Drop` will be executed if... |
| <a href=#501 id=501 data-nosnippet>501</a> /// |
| <a href=#502 id=502 data-nosnippet>502</a> /// **Needs clarification**: End of that sentence. This in effect should document the exact |
| <a href=#503 id=503 data-nosnippet>503</a> /// behavior of drop elaboration. The following sounds vaguely right, but I'm not quite sure: |
| <a href=#504 id=504 data-nosnippet>504</a> /// |
| <a href=#505 id=505 data-nosnippet>505</a> /// > The drop glue is executed if, among all statements executed within this `Body`, an assignment to |
| <a href=#506 id=506 data-nosnippet>506</a> /// > the place or one of its "parents" occurred more recently than a move out of it. This does not |
| <a href=#507 id=507 data-nosnippet>507</a> /// > consider indirect assignments. |
| <a href=#508 id=508 data-nosnippet>508</a> </span>Drop { place: Place, target: BasicBlockId, unwind: <span class="prelude-ty">Option</span><BasicBlockId> }, |
| <a href=#509 id=509 data-nosnippet>509</a> |
| <a href=#510 id=510 data-nosnippet>510</a> <span class="doccomment">/// Drops the place and assigns a new value to it. |
| <a href=#511 id=511 data-nosnippet>511</a> /// |
| <a href=#512 id=512 data-nosnippet>512</a> /// This first performs the exact same operation as the pre drop-elaboration `Drop` terminator; |
| <a href=#513 id=513 data-nosnippet>513</a> /// it then additionally assigns the `value` to the `place` as if by an assignment statement. |
| <a href=#514 id=514 data-nosnippet>514</a> /// This assignment occurs both in the unwind and the regular code paths. The semantics are best |
| <a href=#515 id=515 data-nosnippet>515</a> /// explained by the elaboration: |
| <a href=#516 id=516 data-nosnippet>516</a> /// |
| <a href=#517 id=517 data-nosnippet>517</a> /// ```ignore (MIR) |
| <a href=#518 id=518 data-nosnippet>518</a> /// BB0 { |
| <a href=#519 id=519 data-nosnippet>519</a> /// DropAndReplace(P <- V, goto BB1, unwind BB2) |
| <a href=#520 id=520 data-nosnippet>520</a> /// } |
| <a href=#521 id=521 data-nosnippet>521</a> /// ``` |
| <a href=#522 id=522 data-nosnippet>522</a> /// |
| <a href=#523 id=523 data-nosnippet>523</a> /// becomes |
| <a href=#524 id=524 data-nosnippet>524</a> /// |
| <a href=#525 id=525 data-nosnippet>525</a> /// ```ignore (MIR) |
| <a href=#526 id=526 data-nosnippet>526</a> /// BB0 { |
| <a href=#527 id=527 data-nosnippet>527</a> /// Drop(P, goto BB1, unwind BB2) |
| <a href=#528 id=528 data-nosnippet>528</a> /// } |
| <a href=#529 id=529 data-nosnippet>529</a> /// BB1 { |
| <a href=#530 id=530 data-nosnippet>530</a> /// // P is now uninitialized |
| <a href=#531 id=531 data-nosnippet>531</a> /// P <- V |
| <a href=#532 id=532 data-nosnippet>532</a> /// } |
| <a href=#533 id=533 data-nosnippet>533</a> /// BB2 { |
| <a href=#534 id=534 data-nosnippet>534</a> /// // P is now uninitialized -- its dtor panicked |
| <a href=#535 id=535 data-nosnippet>535</a> /// P <- V |
| <a href=#536 id=536 data-nosnippet>536</a> /// } |
| <a href=#537 id=537 data-nosnippet>537</a> /// ``` |
| <a href=#538 id=538 data-nosnippet>538</a> /// |
| <a href=#539 id=539 data-nosnippet>539</a> /// Disallowed after drop elaboration. |
| <a href=#540 id=540 data-nosnippet>540</a> </span>DropAndReplace { |
| <a href=#541 id=541 data-nosnippet>541</a> place: Place, |
| <a href=#542 id=542 data-nosnippet>542</a> value: Operand, |
| <a href=#543 id=543 data-nosnippet>543</a> target: BasicBlockId, |
| <a href=#544 id=544 data-nosnippet>544</a> unwind: <span class="prelude-ty">Option</span><BasicBlockId>, |
| <a href=#545 id=545 data-nosnippet>545</a> }, |
| <a href=#546 id=546 data-nosnippet>546</a> |
| <a href=#547 id=547 data-nosnippet>547</a> <span class="doccomment">/// Roughly speaking, evaluates the `func` operand and the arguments, and starts execution of |
| <a href=#548 id=548 data-nosnippet>548</a> /// the referred to function. The operand types must match the argument types of the function. |
| <a href=#549 id=549 data-nosnippet>549</a> /// The return place type must match the return type. The type of the `func` operand must be |
| <a href=#550 id=550 data-nosnippet>550</a> /// callable, meaning either a function pointer, a function type, or a closure type. |
| <a href=#551 id=551 data-nosnippet>551</a> /// |
| <a href=#552 id=552 data-nosnippet>552</a> /// **Needs clarification**: The exact semantics of this. Current backends rely on `move` |
| <a href=#553 id=553 data-nosnippet>553</a> /// operands not aliasing the return place. It is unclear how this is justified in MIR, see |
| <a href=#554 id=554 data-nosnippet>554</a> /// [#71117]. |
| <a href=#555 id=555 data-nosnippet>555</a> /// |
| <a href=#556 id=556 data-nosnippet>556</a> /// [#71117]: https://github.com/rust-lang/rust/issues/71117 |
| <a href=#557 id=557 data-nosnippet>557</a> </span>Call { |
| <a href=#558 id=558 data-nosnippet>558</a> <span class="doccomment">/// The function that’s being called. |
| <a href=#559 id=559 data-nosnippet>559</a> </span>func: Operand, |
| <a href=#560 id=560 data-nosnippet>560</a> <span class="doccomment">/// Arguments the function is called with. |
| <a href=#561 id=561 data-nosnippet>561</a> /// These are owned by the callee, which is free to modify them. |
| <a href=#562 id=562 data-nosnippet>562</a> /// This allows the memory occupied by "by-value" arguments to be |
| <a href=#563 id=563 data-nosnippet>563</a> /// reused across function calls without duplicating the contents. |
| <a href=#564 id=564 data-nosnippet>564</a> </span>args: Box<[Operand]>, |
| <a href=#565 id=565 data-nosnippet>565</a> <span class="doccomment">/// Where the returned value will be written |
| <a href=#566 id=566 data-nosnippet>566</a> </span>destination: Place, |
| <a href=#567 id=567 data-nosnippet>567</a> <span class="doccomment">/// Where to go after this call returns. If none, the call necessarily diverges. |
| <a href=#568 id=568 data-nosnippet>568</a> </span>target: <span class="prelude-ty">Option</span><BasicBlockId>, |
| <a href=#569 id=569 data-nosnippet>569</a> <span class="doccomment">/// Cleanups to be done if the call unwinds. |
| <a href=#570 id=570 data-nosnippet>570</a> </span>cleanup: <span class="prelude-ty">Option</span><BasicBlockId>, |
| <a href=#571 id=571 data-nosnippet>571</a> <span class="doccomment">/// `true` if this is from a call in HIR rather than from an overloaded |
| <a href=#572 id=572 data-nosnippet>572</a> /// operator. True for overloaded function call. |
| <a href=#573 id=573 data-nosnippet>573</a> </span>from_hir_call: bool, |
| <a href=#574 id=574 data-nosnippet>574</a> <span class="comment">// This `Span` is the span of the function, without the dot and receiver |
| <a href=#575 id=575 data-nosnippet>575</a> // (e.g. `foo(a, b)` in `x.foo(a, b)` |
| <a href=#576 id=576 data-nosnippet>576</a> //fn_span: Span, |
| <a href=#577 id=577 data-nosnippet>577</a> </span>}, |
| <a href=#578 id=578 data-nosnippet>578</a> |
| <a href=#579 id=579 data-nosnippet>579</a> <span class="doccomment">/// Evaluates the operand, which must have type `bool`. If it is not equal to `expected`, |
| <a href=#580 id=580 data-nosnippet>580</a> /// initiates a panic. Initiating a panic corresponds to a `Call` terminator with some |
| <a href=#581 id=581 data-nosnippet>581</a> /// unspecified constant as the function to call, all the operands stored in the `AssertMessage` |
| <a href=#582 id=582 data-nosnippet>582</a> /// as parameters, and `None` for the destination. Keep in mind that the `cleanup` path is not |
| <a href=#583 id=583 data-nosnippet>583</a> /// necessarily executed even in the case of a panic, for example in `-C panic=abort`. If the |
| <a href=#584 id=584 data-nosnippet>584</a> /// assertion does not fail, execution continues at the specified basic block. |
| <a href=#585 id=585 data-nosnippet>585</a> </span>Assert { |
| <a href=#586 id=586 data-nosnippet>586</a> cond: Operand, |
| <a href=#587 id=587 data-nosnippet>587</a> expected: bool, |
| <a href=#588 id=588 data-nosnippet>588</a> <span class="comment">//msg: AssertMessage, |
| <a href=#589 id=589 data-nosnippet>589</a> </span>target: BasicBlockId, |
| <a href=#590 id=590 data-nosnippet>590</a> cleanup: <span class="prelude-ty">Option</span><BasicBlockId>, |
| <a href=#591 id=591 data-nosnippet>591</a> }, |
| <a href=#592 id=592 data-nosnippet>592</a> |
| <a href=#593 id=593 data-nosnippet>593</a> <span class="doccomment">/// Marks a suspend point. |
| <a href=#594 id=594 data-nosnippet>594</a> /// |
| <a href=#595 id=595 data-nosnippet>595</a> /// Like `Return` terminators in coroutine bodies, this computes `value` and then a |
| <a href=#596 id=596 data-nosnippet>596</a> /// `CoroutineState::Yielded(value)` as if by `Aggregate` rvalue. That value is then assigned to |
| <a href=#597 id=597 data-nosnippet>597</a> /// the return place of the function calling this one, and execution continues in the calling |
| <a href=#598 id=598 data-nosnippet>598</a> /// function. When next invoked with the same first argument, execution of this function |
| <a href=#599 id=599 data-nosnippet>599</a> /// continues at the `resume` basic block, with the second argument written to the `resume_arg` |
| <a href=#600 id=600 data-nosnippet>600</a> /// place. If the coroutine is dropped before then, the `drop` basic block is invoked. |
| <a href=#601 id=601 data-nosnippet>601</a> /// |
| <a href=#602 id=602 data-nosnippet>602</a> /// Not permitted in bodies that are not coroutine bodies, or after coroutine lowering. |
| <a href=#603 id=603 data-nosnippet>603</a> /// |
| <a href=#604 id=604 data-nosnippet>604</a> /// **Needs clarification**: What about the evaluation order of the `resume_arg` and `value`? |
| <a href=#605 id=605 data-nosnippet>605</a> </span>Yield { |
| <a href=#606 id=606 data-nosnippet>606</a> <span class="doccomment">/// The value to return. |
| <a href=#607 id=607 data-nosnippet>607</a> </span>value: Operand, |
| <a href=#608 id=608 data-nosnippet>608</a> <span class="doccomment">/// Where to resume to. |
| <a href=#609 id=609 data-nosnippet>609</a> </span>resume: BasicBlockId, |
| <a href=#610 id=610 data-nosnippet>610</a> <span class="doccomment">/// The place to store the resume argument in. |
| <a href=#611 id=611 data-nosnippet>611</a> </span>resume_arg: Place, |
| <a href=#612 id=612 data-nosnippet>612</a> <span class="doccomment">/// Cleanup to be done if the coroutine is dropped at this suspend point. |
| <a href=#613 id=613 data-nosnippet>613</a> </span>drop: <span class="prelude-ty">Option</span><BasicBlockId>, |
| <a href=#614 id=614 data-nosnippet>614</a> }, |
| <a href=#615 id=615 data-nosnippet>615</a> |
| <a href=#616 id=616 data-nosnippet>616</a> <span class="doccomment">/// Indicates the end of dropping a coroutine. |
| <a href=#617 id=617 data-nosnippet>617</a> /// |
| <a href=#618 id=618 data-nosnippet>618</a> /// Semantically just a `return` (from the coroutines drop glue). Only permitted in the same situations |
| <a href=#619 id=619 data-nosnippet>619</a> /// as `yield`. |
| <a href=#620 id=620 data-nosnippet>620</a> /// |
| <a href=#621 id=621 data-nosnippet>621</a> /// **Needs clarification**: Is that even correct? The coroutine drop code is always confusing |
| <a href=#622 id=622 data-nosnippet>622</a> /// to me, because it's not even really in the current body. |
| <a href=#623 id=623 data-nosnippet>623</a> /// |
| <a href=#624 id=624 data-nosnippet>624</a> /// **Needs clarification**: Are there type system constraints on these terminators? Should |
| <a href=#625 id=625 data-nosnippet>625</a> /// there be a "block type" like `cleanup` blocks for them? |
| <a href=#626 id=626 data-nosnippet>626</a> </span>CoroutineDrop, |
| <a href=#627 id=627 data-nosnippet>627</a> |
| <a href=#628 id=628 data-nosnippet>628</a> <span class="doccomment">/// A block where control flow only ever takes one real path, but borrowck needs to be more |
| <a href=#629 id=629 data-nosnippet>629</a> /// conservative. |
| <a href=#630 id=630 data-nosnippet>630</a> /// |
| <a href=#631 id=631 data-nosnippet>631</a> /// At runtime this is semantically just a goto. |
| <a href=#632 id=632 data-nosnippet>632</a> /// |
| <a href=#633 id=633 data-nosnippet>633</a> /// Disallowed after drop elaboration. |
| <a href=#634 id=634 data-nosnippet>634</a> </span>FalseEdge { |
| <a href=#635 id=635 data-nosnippet>635</a> <span class="doccomment">/// The target normal control flow will take. |
| <a href=#636 id=636 data-nosnippet>636</a> </span>real_target: BasicBlockId, |
| <a href=#637 id=637 data-nosnippet>637</a> <span class="doccomment">/// A block control flow could conceptually jump to, but won't in |
| <a href=#638 id=638 data-nosnippet>638</a> /// practice. |
| <a href=#639 id=639 data-nosnippet>639</a> </span>imaginary_target: BasicBlockId, |
| <a href=#640 id=640 data-nosnippet>640</a> }, |
| <a href=#641 id=641 data-nosnippet>641</a> |
| <a href=#642 id=642 data-nosnippet>642</a> <span class="doccomment">/// A terminator for blocks that only take one path in reality, but where we reserve the right |
| <a href=#643 id=643 data-nosnippet>643</a> /// to unwind in borrowck, even if it won't happen in practice. This can arise in infinite loops |
| <a href=#644 id=644 data-nosnippet>644</a> /// with no function calls for example. |
| <a href=#645 id=645 data-nosnippet>645</a> /// |
| <a href=#646 id=646 data-nosnippet>646</a> /// At runtime this is semantically just a goto. |
| <a href=#647 id=647 data-nosnippet>647</a> /// |
| <a href=#648 id=648 data-nosnippet>648</a> /// Disallowed after drop elaboration. |
| <a href=#649 id=649 data-nosnippet>649</a> </span>FalseUnwind { |
| <a href=#650 id=650 data-nosnippet>650</a> <span class="doccomment">/// The target normal control flow will take. |
| <a href=#651 id=651 data-nosnippet>651</a> </span>real_target: BasicBlockId, |
| <a href=#652 id=652 data-nosnippet>652</a> <span class="doccomment">/// The imaginary cleanup block link. This particular path will never be taken |
| <a href=#653 id=653 data-nosnippet>653</a> /// in practice, but in order to avoid fragility we want to always |
| <a href=#654 id=654 data-nosnippet>654</a> /// consider it in borrowck. We don't want to accept programs which |
| <a href=#655 id=655 data-nosnippet>655</a> /// pass borrowck only when `panic=abort` or some assertions are disabled |
| <a href=#656 id=656 data-nosnippet>656</a> /// due to release vs. debug mode builds. This needs to be an `Option` because |
| <a href=#657 id=657 data-nosnippet>657</a> /// of the `remove_noop_landing_pads` and `abort_unwinding_calls` passes. |
| <a href=#658 id=658 data-nosnippet>658</a> </span>unwind: <span class="prelude-ty">Option</span><BasicBlockId>, |
| <a href=#659 id=659 data-nosnippet>659</a> }, |
| <a href=#660 id=660 data-nosnippet>660</a>} |
| <a href=#661 id=661 data-nosnippet>661</a> |
| <a href=#662 id=662 data-nosnippet>662</a><span class="comment">// Order of variants in this enum matter: they are used to compare borrow kinds. |
| <a href=#663 id=663 data-nosnippet>663</a></span><span class="attr">#[derive(Debug, PartialEq, Eq, Clone, Copy, PartialOrd, Ord)] |
| <a href=#664 id=664 data-nosnippet>664</a></span><span class="kw">pub enum </span>BorrowKind { |
| <a href=#665 id=665 data-nosnippet>665</a> <span class="doccomment">/// Data must be immutable and is aliasable. |
| <a href=#666 id=666 data-nosnippet>666</a> </span>Shared, |
| <a href=#667 id=667 data-nosnippet>667</a> |
| <a href=#668 id=668 data-nosnippet>668</a> <span class="doccomment">/// The immediately borrowed place must be immutable, but projections from |
| <a href=#669 id=669 data-nosnippet>669</a> /// it don't need to be. For example, a shallow borrow of `a.b` doesn't |
| <a href=#670 id=670 data-nosnippet>670</a> /// conflict with a mutable borrow of `a.b.c`. |
| <a href=#671 id=671 data-nosnippet>671</a> /// |
| <a href=#672 id=672 data-nosnippet>672</a> /// This is used when lowering matches: when matching on a place we want to |
| <a href=#673 id=673 data-nosnippet>673</a> /// ensure that place have the same value from the start of the match until |
| <a href=#674 id=674 data-nosnippet>674</a> /// an arm is selected. This prevents this code from compiling: |
| <a href=#675 id=675 data-nosnippet>675</a> /// ```compile_fail,E0510 |
| <a href=#676 id=676 data-nosnippet>676</a> /// let mut x = &Some(0); |
| <a href=#677 id=677 data-nosnippet>677</a> /// match *x { |
| <a href=#678 id=678 data-nosnippet>678</a> /// None => (), |
| <a href=#679 id=679 data-nosnippet>679</a> /// Some(_) if { x = &None; false } => (), |
| <a href=#680 id=680 data-nosnippet>680</a> /// Some(_) => (), |
| <a href=#681 id=681 data-nosnippet>681</a> /// } |
| <a href=#682 id=682 data-nosnippet>682</a> /// ``` |
| <a href=#683 id=683 data-nosnippet>683</a> /// This can't be a shared borrow because mutably borrowing (*x as Some).0 |
| <a href=#684 id=684 data-nosnippet>684</a> /// should not prevent `if let None = x { ... }`, for example, because the |
| <a href=#685 id=685 data-nosnippet>685</a> /// mutating `(*x as Some).0` can't affect the discriminant of `x`. |
| <a href=#686 id=686 data-nosnippet>686</a> /// We can also report errors with this kind of borrow differently. |
| <a href=#687 id=687 data-nosnippet>687</a> </span>Shallow, |
| <a href=#688 id=688 data-nosnippet>688</a> |
| <a href=#689 id=689 data-nosnippet>689</a> <span class="doccomment">/// Data is mutable and not aliasable. |
| <a href=#690 id=690 data-nosnippet>690</a> </span>Mut { kind: MutBorrowKind }, |
| <a href=#691 id=691 data-nosnippet>691</a>} |
| <a href=#692 id=692 data-nosnippet>692</a> |
| <a href=#693 id=693 data-nosnippet>693</a><span class="comment">// Order of variants in this enum matter: they are used to compare borrow kinds. |
| <a href=#694 id=694 data-nosnippet>694</a></span><span class="attr">#[derive(Debug, PartialEq, Eq, Clone, Copy, PartialOrd, Ord)] |
| <a href=#695 id=695 data-nosnippet>695</a></span><span class="kw">pub enum </span>MutBorrowKind { |
| <a href=#696 id=696 data-nosnippet>696</a> <span class="doccomment">/// Data must be immutable but not aliasable. This kind of borrow cannot currently |
| <a href=#697 id=697 data-nosnippet>697</a> /// be expressed by the user and is used only in implicit closure bindings. |
| <a href=#698 id=698 data-nosnippet>698</a> </span>ClosureCapture, |
| <a href=#699 id=699 data-nosnippet>699</a> Default, |
| <a href=#700 id=700 data-nosnippet>700</a> <span class="doccomment">/// This borrow arose from method-call auto-ref |
| <a href=#701 id=701 data-nosnippet>701</a> /// (i.e., adjustment::Adjust::Borrow). |
| <a href=#702 id=702 data-nosnippet>702</a> </span>TwoPhasedBorrow, |
| <a href=#703 id=703 data-nosnippet>703</a>} |
| <a href=#704 id=704 data-nosnippet>704</a> |
| <a href=#705 id=705 data-nosnippet>705</a><span class="kw">impl </span>BorrowKind { |
| <a href=#706 id=706 data-nosnippet>706</a> <span class="kw">fn </span>from_hir(m: hir_def::type_ref::Mutability) -> <span class="self">Self </span>{ |
| <a href=#707 id=707 data-nosnippet>707</a> <span class="kw">match </span>m { |
| <a href=#708 id=708 data-nosnippet>708</a> hir_def::type_ref::Mutability::Shared => BorrowKind::Shared, |
| <a href=#709 id=709 data-nosnippet>709</a> hir_def::type_ref::Mutability::Mut => BorrowKind::Mut { kind: MutBorrowKind::Default }, |
| <a href=#710 id=710 data-nosnippet>710</a> } |
| <a href=#711 id=711 data-nosnippet>711</a> } |
| <a href=#712 id=712 data-nosnippet>712</a> |
| <a href=#713 id=713 data-nosnippet>713</a> <span class="kw">fn </span>from_rustc(m: rustc_ast_ir::Mutability) -> <span class="self">Self </span>{ |
| <a href=#714 id=714 data-nosnippet>714</a> <span class="kw">match </span>m { |
| <a href=#715 id=715 data-nosnippet>715</a> rustc_ast_ir::Mutability::Not => BorrowKind::Shared, |
| <a href=#716 id=716 data-nosnippet>716</a> rustc_ast_ir::Mutability::Mut => BorrowKind::Mut { kind: MutBorrowKind::Default }, |
| <a href=#717 id=717 data-nosnippet>717</a> } |
| <a href=#718 id=718 data-nosnippet>718</a> } |
| <a href=#719 id=719 data-nosnippet>719</a>} |
| <a href=#720 id=720 data-nosnippet>720</a> |
| <a href=#721 id=721 data-nosnippet>721</a><span class="attr">#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)] |
| <a href=#722 id=722 data-nosnippet>722</a></span><span class="kw">pub enum </span>UnOp { |
| <a href=#723 id=723 data-nosnippet>723</a> <span class="doccomment">/// The `!` operator for logical inversion |
| <a href=#724 id=724 data-nosnippet>724</a> </span>Not, |
| <a href=#725 id=725 data-nosnippet>725</a> <span class="doccomment">/// The `-` operator for negation |
| <a href=#726 id=726 data-nosnippet>726</a> </span>Neg, |
| <a href=#727 id=727 data-nosnippet>727</a>} |
| <a href=#728 id=728 data-nosnippet>728</a> |
| <a href=#729 id=729 data-nosnippet>729</a><span class="attr">#[derive(Debug, PartialEq, Eq, Clone)] |
| <a href=#730 id=730 data-nosnippet>730</a></span><span class="kw">pub enum </span>BinOp { |
| <a href=#731 id=731 data-nosnippet>731</a> <span class="doccomment">/// The `+` operator (addition) |
| <a href=#732 id=732 data-nosnippet>732</a> </span>Add, |
| <a href=#733 id=733 data-nosnippet>733</a> <span class="doccomment">/// The `-` operator (subtraction) |
| <a href=#734 id=734 data-nosnippet>734</a> </span>Sub, |
| <a href=#735 id=735 data-nosnippet>735</a> <span class="doccomment">/// The `*` operator (multiplication) |
| <a href=#736 id=736 data-nosnippet>736</a> </span>Mul, |
| <a href=#737 id=737 data-nosnippet>737</a> <span class="doccomment">/// The `/` operator (division) |
| <a href=#738 id=738 data-nosnippet>738</a> /// |
| <a href=#739 id=739 data-nosnippet>739</a> /// Division by zero is UB, because the compiler should have inserted checks |
| <a href=#740 id=740 data-nosnippet>740</a> /// prior to this. |
| <a href=#741 id=741 data-nosnippet>741</a> </span>Div, |
| <a href=#742 id=742 data-nosnippet>742</a> <span class="doccomment">/// The `%` operator (modulus) |
| <a href=#743 id=743 data-nosnippet>743</a> /// |
| <a href=#744 id=744 data-nosnippet>744</a> /// Using zero as the modulus (second operand) is UB, because the compiler |
| <a href=#745 id=745 data-nosnippet>745</a> /// should have inserted checks prior to this. |
| <a href=#746 id=746 data-nosnippet>746</a> </span>Rem, |
| <a href=#747 id=747 data-nosnippet>747</a> <span class="doccomment">/// The `^` operator (bitwise xor) |
| <a href=#748 id=748 data-nosnippet>748</a> </span>BitXor, |
| <a href=#749 id=749 data-nosnippet>749</a> <span class="doccomment">/// The `&` operator (bitwise and) |
| <a href=#750 id=750 data-nosnippet>750</a> </span>BitAnd, |
| <a href=#751 id=751 data-nosnippet>751</a> <span class="doccomment">/// The `|` operator (bitwise or) |
| <a href=#752 id=752 data-nosnippet>752</a> </span>BitOr, |
| <a href=#753 id=753 data-nosnippet>753</a> <span class="doccomment">/// The `<<` operator (shift left) |
| <a href=#754 id=754 data-nosnippet>754</a> /// |
| <a href=#755 id=755 data-nosnippet>755</a> /// The offset is truncated to the size of the first operand before shifting. |
| <a href=#756 id=756 data-nosnippet>756</a> </span>Shl, |
| <a href=#757 id=757 data-nosnippet>757</a> <span class="doccomment">/// The `>>` operator (shift right) |
| <a href=#758 id=758 data-nosnippet>758</a> /// |
| <a href=#759 id=759 data-nosnippet>759</a> /// The offset is truncated to the size of the first operand before shifting. |
| <a href=#760 id=760 data-nosnippet>760</a> </span>Shr, |
| <a href=#761 id=761 data-nosnippet>761</a> <span class="doccomment">/// The `==` operator (equality) |
| <a href=#762 id=762 data-nosnippet>762</a> </span>Eq, |
| <a href=#763 id=763 data-nosnippet>763</a> <span class="doccomment">/// The `<` operator (less than) |
| <a href=#764 id=764 data-nosnippet>764</a> </span>Lt, |
| <a href=#765 id=765 data-nosnippet>765</a> <span class="doccomment">/// The `<=` operator (less than or equal to) |
| <a href=#766 id=766 data-nosnippet>766</a> </span>Le, |
| <a href=#767 id=767 data-nosnippet>767</a> <span class="doccomment">/// The `!=` operator (not equal to) |
| <a href=#768 id=768 data-nosnippet>768</a> </span>Ne, |
| <a href=#769 id=769 data-nosnippet>769</a> <span class="doccomment">/// The `>=` operator (greater than or equal to) |
| <a href=#770 id=770 data-nosnippet>770</a> </span>Ge, |
| <a href=#771 id=771 data-nosnippet>771</a> <span class="doccomment">/// The `>` operator (greater than) |
| <a href=#772 id=772 data-nosnippet>772</a> </span>Gt, |
| <a href=#773 id=773 data-nosnippet>773</a> <span class="doccomment">/// The `ptr.offset` operator |
| <a href=#774 id=774 data-nosnippet>774</a> </span>Offset, |
| <a href=#775 id=775 data-nosnippet>775</a>} |
| <a href=#776 id=776 data-nosnippet>776</a> |
| <a href=#777 id=777 data-nosnippet>777</a><span class="kw">impl </span>BinOp { |
| <a href=#778 id=778 data-nosnippet>778</a> <span class="kw">fn </span>run_compare<T: PartialEq + PartialOrd>(<span class="kw-2">&</span><span class="self">self</span>, l: T, r: T) -> bool { |
| <a href=#779 id=779 data-nosnippet>779</a> <span class="kw">match </span><span class="self">self </span>{ |
| <a href=#780 id=780 data-nosnippet>780</a> BinOp::Ge => l >= r, |
| <a href=#781 id=781 data-nosnippet>781</a> BinOp::Gt => l > r, |
| <a href=#782 id=782 data-nosnippet>782</a> BinOp::Le => l <= r, |
| <a href=#783 id=783 data-nosnippet>783</a> BinOp::Lt => l < r, |
| <a href=#784 id=784 data-nosnippet>784</a> BinOp::Eq => l == r, |
| <a href=#785 id=785 data-nosnippet>785</a> BinOp::Ne => <span class="macro">l !</span>= r, |
| <a href=#786 id=786 data-nosnippet>786</a> x => <span class="macro">panic!</span>(<span class="string">"`run_compare` called on operator {x:?}"</span>), |
| <a href=#787 id=787 data-nosnippet>787</a> } |
| <a href=#788 id=788 data-nosnippet>788</a> } |
| <a href=#789 id=789 data-nosnippet>789</a>} |
| <a href=#790 id=790 data-nosnippet>790</a> |
| <a href=#791 id=791 data-nosnippet>791</a><span class="kw">impl </span>Display <span class="kw">for </span>BinOp { |
| <a href=#792 id=792 data-nosnippet>792</a> <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>std::fmt::Formatter<<span class="lifetime">'_</span>>) -> std::fmt::Result { |
| <a href=#793 id=793 data-nosnippet>793</a> f.write_str(<span class="kw">match </span><span class="self">self </span>{ |
| <a href=#794 id=794 data-nosnippet>794</a> BinOp::Add => <span class="string">"+"</span>, |
| <a href=#795 id=795 data-nosnippet>795</a> BinOp::Sub => <span class="string">"-"</span>, |
| <a href=#796 id=796 data-nosnippet>796</a> BinOp::Mul => <span class="string">"*"</span>, |
| <a href=#797 id=797 data-nosnippet>797</a> BinOp::Div => <span class="string">"/"</span>, |
| <a href=#798 id=798 data-nosnippet>798</a> BinOp::Rem => <span class="string">"%"</span>, |
| <a href=#799 id=799 data-nosnippet>799</a> BinOp::BitXor => <span class="string">"^"</span>, |
| <a href=#800 id=800 data-nosnippet>800</a> BinOp::BitAnd => <span class="string">"&"</span>, |
| <a href=#801 id=801 data-nosnippet>801</a> BinOp::BitOr => <span class="string">"|"</span>, |
| <a href=#802 id=802 data-nosnippet>802</a> BinOp::Shl => <span class="string">"<<"</span>, |
| <a href=#803 id=803 data-nosnippet>803</a> BinOp::Shr => <span class="string">">>"</span>, |
| <a href=#804 id=804 data-nosnippet>804</a> BinOp::Eq => <span class="string">"=="</span>, |
| <a href=#805 id=805 data-nosnippet>805</a> BinOp::Lt => <span class="string">"<"</span>, |
| <a href=#806 id=806 data-nosnippet>806</a> BinOp::Le => <span class="string">"<="</span>, |
| <a href=#807 id=807 data-nosnippet>807</a> BinOp::Ne => <span class="string">"!="</span>, |
| <a href=#808 id=808 data-nosnippet>808</a> BinOp::Ge => <span class="string">">="</span>, |
| <a href=#809 id=809 data-nosnippet>809</a> BinOp::Gt => <span class="string">">"</span>, |
| <a href=#810 id=810 data-nosnippet>810</a> BinOp::Offset => <span class="string">"`offset`"</span>, |
| <a href=#811 id=811 data-nosnippet>811</a> }) |
| <a href=#812 id=812 data-nosnippet>812</a> } |
| <a href=#813 id=813 data-nosnippet>813</a>} |
| <a href=#814 id=814 data-nosnippet>814</a> |
| <a href=#815 id=815 data-nosnippet>815</a><span class="kw">impl </span>From<hir_def::hir::ArithOp> <span class="kw">for </span>BinOp { |
| <a href=#816 id=816 data-nosnippet>816</a> <span class="kw">fn </span>from(value: hir_def::hir::ArithOp) -> <span class="self">Self </span>{ |
| <a href=#817 id=817 data-nosnippet>817</a> <span class="kw">match </span>value { |
| <a href=#818 id=818 data-nosnippet>818</a> hir_def::hir::ArithOp::Add => BinOp::Add, |
| <a href=#819 id=819 data-nosnippet>819</a> hir_def::hir::ArithOp::Mul => BinOp::Mul, |
| <a href=#820 id=820 data-nosnippet>820</a> hir_def::hir::ArithOp::Sub => BinOp::Sub, |
| <a href=#821 id=821 data-nosnippet>821</a> hir_def::hir::ArithOp::Div => BinOp::Div, |
| <a href=#822 id=822 data-nosnippet>822</a> hir_def::hir::ArithOp::Rem => BinOp::Rem, |
| <a href=#823 id=823 data-nosnippet>823</a> hir_def::hir::ArithOp::Shl => BinOp::Shl, |
| <a href=#824 id=824 data-nosnippet>824</a> hir_def::hir::ArithOp::Shr => BinOp::Shr, |
| <a href=#825 id=825 data-nosnippet>825</a> hir_def::hir::ArithOp::BitXor => BinOp::BitXor, |
| <a href=#826 id=826 data-nosnippet>826</a> hir_def::hir::ArithOp::BitOr => BinOp::BitOr, |
| <a href=#827 id=827 data-nosnippet>827</a> hir_def::hir::ArithOp::BitAnd => BinOp::BitAnd, |
| <a href=#828 id=828 data-nosnippet>828</a> } |
| <a href=#829 id=829 data-nosnippet>829</a> } |
| <a href=#830 id=830 data-nosnippet>830</a>} |
| <a href=#831 id=831 data-nosnippet>831</a> |
| <a href=#832 id=832 data-nosnippet>832</a><span class="kw">impl </span>From<hir_def::hir::CmpOp> <span class="kw">for </span>BinOp { |
| <a href=#833 id=833 data-nosnippet>833</a> <span class="kw">fn </span>from(value: hir_def::hir::CmpOp) -> <span class="self">Self </span>{ |
| <a href=#834 id=834 data-nosnippet>834</a> <span class="kw">match </span>value { |
| <a href=#835 id=835 data-nosnippet>835</a> hir_def::hir::CmpOp::Eq { negated: <span class="bool-val">false </span>} => BinOp::Eq, |
| <a href=#836 id=836 data-nosnippet>836</a> hir_def::hir::CmpOp::Eq { negated: <span class="bool-val">true </span>} => BinOp::Ne, |
| <a href=#837 id=837 data-nosnippet>837</a> hir_def::hir::CmpOp::Ord { ordering: Ordering::Greater, strict: <span class="bool-val">false </span>} => BinOp::Ge, |
| <a href=#838 id=838 data-nosnippet>838</a> hir_def::hir::CmpOp::Ord { ordering: Ordering::Greater, strict: <span class="bool-val">true </span>} => BinOp::Gt, |
| <a href=#839 id=839 data-nosnippet>839</a> hir_def::hir::CmpOp::Ord { ordering: Ordering::Less, strict: <span class="bool-val">false </span>} => BinOp::Le, |
| <a href=#840 id=840 data-nosnippet>840</a> hir_def::hir::CmpOp::Ord { ordering: Ordering::Less, strict: <span class="bool-val">true </span>} => BinOp::Lt, |
| <a href=#841 id=841 data-nosnippet>841</a> } |
| <a href=#842 id=842 data-nosnippet>842</a> } |
| <a href=#843 id=843 data-nosnippet>843</a>} |
| <a href=#844 id=844 data-nosnippet>844</a> |
| <a href=#845 id=845 data-nosnippet>845</a><span class="kw">impl </span>From<Operand> <span class="kw">for </span>Rvalue { |
| <a href=#846 id=846 data-nosnippet>846</a> <span class="kw">fn </span>from(x: Operand) -> <span class="self">Self </span>{ |
| <a href=#847 id=847 data-nosnippet>847</a> <span class="self">Self</span>::Use(x) |
| <a href=#848 id=848 data-nosnippet>848</a> } |
| <a href=#849 id=849 data-nosnippet>849</a>} |
| <a href=#850 id=850 data-nosnippet>850</a> |
| <a href=#851 id=851 data-nosnippet>851</a><span class="attr">#[derive(Debug, PartialEq, Eq, Clone)] |
| <a href=#852 id=852 data-nosnippet>852</a></span><span class="kw">pub enum </span>CastKind { |
| <a href=#853 id=853 data-nosnippet>853</a> <span class="doccomment">/// An exposing pointer to address cast. A cast between a pointer and an integer type, or |
| <a href=#854 id=854 data-nosnippet>854</a> /// between a function pointer and an integer type. |
| <a href=#855 id=855 data-nosnippet>855</a> /// See the docs on `expose_addr` for more details. |
| <a href=#856 id=856 data-nosnippet>856</a> </span>PointerExposeAddress, |
| <a href=#857 id=857 data-nosnippet>857</a> <span class="doccomment">/// An address-to-pointer cast that picks up an exposed provenance. |
| <a href=#858 id=858 data-nosnippet>858</a> /// See the docs on `from_exposed_addr` for more details. |
| <a href=#859 id=859 data-nosnippet>859</a> </span>PointerFromExposedAddress, |
| <a href=#860 id=860 data-nosnippet>860</a> <span class="doccomment">/// All sorts of pointer-to-pointer casts. Note that reference-to-raw-ptr casts are |
| <a href=#861 id=861 data-nosnippet>861</a> /// translated into `&raw mut/const *r`, i.e., they are not actually casts. |
| <a href=#862 id=862 data-nosnippet>862</a> </span>PtrToPtr, |
| <a href=#863 id=863 data-nosnippet>863</a> <span class="doccomment">/// Pointer related casts that are done by coercions. |
| <a href=#864 id=864 data-nosnippet>864</a> </span>PointerCoercion(PointerCast), |
| <a href=#865 id=865 data-nosnippet>865</a> <span class="doccomment">/// Cast into a dyn* object. |
| <a href=#866 id=866 data-nosnippet>866</a> </span>DynStar, |
| <a href=#867 id=867 data-nosnippet>867</a> IntToInt, |
| <a href=#868 id=868 data-nosnippet>868</a> FloatToInt, |
| <a href=#869 id=869 data-nosnippet>869</a> FloatToFloat, |
| <a href=#870 id=870 data-nosnippet>870</a> IntToFloat, |
| <a href=#871 id=871 data-nosnippet>871</a> FnPtrToPtr, |
| <a href=#872 id=872 data-nosnippet>872</a>} |
| <a href=#873 id=873 data-nosnippet>873</a> |
| <a href=#874 id=874 data-nosnippet>874</a><span class="attr">#[derive(Debug, PartialEq, Eq, Clone)] |
| <a href=#875 id=875 data-nosnippet>875</a></span><span class="kw">pub enum </span>Rvalue { |
| <a href=#876 id=876 data-nosnippet>876</a> <span class="doccomment">/// Yields the operand unchanged |
| <a href=#877 id=877 data-nosnippet>877</a> </span>Use(Operand), |
| <a href=#878 id=878 data-nosnippet>878</a> |
| <a href=#879 id=879 data-nosnippet>879</a> <span class="doccomment">/// Creates an array where each element is the value of the operand. |
| <a href=#880 id=880 data-nosnippet>880</a> /// |
| <a href=#881 id=881 data-nosnippet>881</a> /// Corresponds to source code like `[x; 32]`. |
| <a href=#882 id=882 data-nosnippet>882</a> </span>Repeat(Operand, StoredConst), |
| <a href=#883 id=883 data-nosnippet>883</a> |
| <a href=#884 id=884 data-nosnippet>884</a> <span class="doccomment">/// Creates a reference of the indicated kind to the place. |
| <a href=#885 id=885 data-nosnippet>885</a> /// |
| <a href=#886 id=886 data-nosnippet>886</a> /// There is not much to document here, because besides the obvious parts the semantics of this |
| <a href=#887 id=887 data-nosnippet>887</a> /// are essentially entirely a part of the aliasing model. There are many UCG issues discussing |
| <a href=#888 id=888 data-nosnippet>888</a> /// exactly what the behavior of this operation should be. |
| <a href=#889 id=889 data-nosnippet>889</a> /// |
| <a href=#890 id=890 data-nosnippet>890</a> /// `Shallow` borrows are disallowed after drop lowering. |
| <a href=#891 id=891 data-nosnippet>891</a> </span>Ref(BorrowKind, Place), |
| <a href=#892 id=892 data-nosnippet>892</a> |
| <a href=#893 id=893 data-nosnippet>893</a> <span class="doccomment">/// Creates a pointer/reference to the given thread local. |
| <a href=#894 id=894 data-nosnippet>894</a> /// |
| <a href=#895 id=895 data-nosnippet>895</a> /// The yielded type is a `*mut T` if the static is mutable, otherwise if the static is extern a |
| <a href=#896 id=896 data-nosnippet>896</a> /// `*const T`, and if neither of those apply a `&T`. |
| <a href=#897 id=897 data-nosnippet>897</a> /// |
| <a href=#898 id=898 data-nosnippet>898</a> /// **Note:** This is a runtime operation that actually executes code and is in this sense more |
| <a href=#899 id=899 data-nosnippet>899</a> /// like a function call. Also, eliminating dead stores of this rvalue causes `fn main() {}` to |
| <a href=#900 id=900 data-nosnippet>900</a> /// SIGILL for some reason that I (JakobDegen) never got a chance to look into. |
| <a href=#901 id=901 data-nosnippet>901</a> /// |
| <a href=#902 id=902 data-nosnippet>902</a> /// **Needs clarification**: Are there weird additional semantics here related to the runtime |
| <a href=#903 id=903 data-nosnippet>903</a> /// nature of this operation? |
| <a href=#904 id=904 data-nosnippet>904</a> </span><span class="comment">// ThreadLocalRef(DefId), |
| <a href=#905 id=905 data-nosnippet>905</a> </span>ThreadLocalRef(std::convert::Infallible), |
| <a href=#906 id=906 data-nosnippet>906</a> |
| <a href=#907 id=907 data-nosnippet>907</a> <span class="doccomment">/// Creates a pointer with the indicated mutability to the place. |
| <a href=#908 id=908 data-nosnippet>908</a> /// |
| <a href=#909 id=909 data-nosnippet>909</a> /// This is generated by pointer casts like `&v as *const _` or raw address of expressions like |
| <a href=#910 id=910 data-nosnippet>910</a> /// `&raw v` or `addr_of!(v)`. |
| <a href=#911 id=911 data-nosnippet>911</a> /// |
| <a href=#912 id=912 data-nosnippet>912</a> /// Like with references, the semantics of this operation are heavily dependent on the aliasing |
| <a href=#913 id=913 data-nosnippet>913</a> /// model. |
| <a href=#914 id=914 data-nosnippet>914</a> </span><span class="comment">// AddressOf(Mutability, Place), |
| <a href=#915 id=915 data-nosnippet>915</a> </span>AddressOf(std::convert::Infallible), |
| <a href=#916 id=916 data-nosnippet>916</a> |
| <a href=#917 id=917 data-nosnippet>917</a> <span class="doccomment">/// Yields the length of the place, as a `usize`. |
| <a href=#918 id=918 data-nosnippet>918</a> /// |
| <a href=#919 id=919 data-nosnippet>919</a> /// If the type of the place is an array, this is the array length. For slices (`[T]`, not |
| <a href=#920 id=920 data-nosnippet>920</a> /// `&[T]`) this accesses the place's metadata to determine the length. This rvalue is |
| <a href=#921 id=921 data-nosnippet>921</a> /// ill-formed for places of other types. |
| <a href=#922 id=922 data-nosnippet>922</a> </span>Len(Place), |
| <a href=#923 id=923 data-nosnippet>923</a> |
| <a href=#924 id=924 data-nosnippet>924</a> <span class="doccomment">/// Performs essentially all of the casts that can be performed via `as`. |
| <a href=#925 id=925 data-nosnippet>925</a> /// |
| <a href=#926 id=926 data-nosnippet>926</a> /// This allows for casts from/to a variety of types. |
| <a href=#927 id=927 data-nosnippet>927</a> /// |
| <a href=#928 id=928 data-nosnippet>928</a> /// **FIXME**: Document exactly which `CastKind`s allow which types of casts. Figure out why |
| <a href=#929 id=929 data-nosnippet>929</a> /// `ArrayToPointer` and `MutToConstPointer` are special. |
| <a href=#930 id=930 data-nosnippet>930</a> </span>Cast(CastKind, Operand, StoredTy), |
| <a href=#931 id=931 data-nosnippet>931</a> |
| <a href=#932 id=932 data-nosnippet>932</a> <span class="comment">// FIXME link to `pointer::offset` when it hits stable. |
| <a href=#933 id=933 data-nosnippet>933</a> </span><span class="doccomment">/// * `Offset` has the same semantics as `pointer::offset`, except that the second |
| <a href=#934 id=934 data-nosnippet>934</a> /// parameter may be a `usize` as well. |
| <a href=#935 id=935 data-nosnippet>935</a> /// * The comparison operations accept `bool`s, `char`s, signed or unsigned integers, floats, |
| <a href=#936 id=936 data-nosnippet>936</a> /// raw pointers, or function pointers and return a `bool`. The types of the operands must be |
| <a href=#937 id=937 data-nosnippet>937</a> /// matching, up to the usual caveat of the lifetimes in function pointers. |
| <a href=#938 id=938 data-nosnippet>938</a> /// * Left and right shift operations accept signed or unsigned integers not necessarily of the |
| <a href=#939 id=939 data-nosnippet>939</a> /// same type and return a value of the same type as their LHS. Like in Rust, the RHS is |
| <a href=#940 id=940 data-nosnippet>940</a> /// truncated as needed. |
| <a href=#941 id=941 data-nosnippet>941</a> /// * The `Bit*` operations accept signed integers, unsigned integers, or bools with matching |
| <a href=#942 id=942 data-nosnippet>942</a> /// types and return a value of that type. |
| <a href=#943 id=943 data-nosnippet>943</a> /// * The remaining operations accept signed integers, unsigned integers, or floats with |
| <a href=#944 id=944 data-nosnippet>944</a> /// matching types and return a value of that type. |
| <a href=#945 id=945 data-nosnippet>945</a> </span><span class="comment">//BinaryOp(BinOp, Box<(Operand, Operand)>), |
| <a href=#946 id=946 data-nosnippet>946</a> </span>BinaryOp(std::convert::Infallible), |
| <a href=#947 id=947 data-nosnippet>947</a> |
| <a href=#948 id=948 data-nosnippet>948</a> <span class="doccomment">/// Same as `BinaryOp`, but yields `(T, bool)` with a `bool` indicating an error condition. |
| <a href=#949 id=949 data-nosnippet>949</a> /// |
| <a href=#950 id=950 data-nosnippet>950</a> /// When overflow checking is disabled and we are generating run-time code, the error condition |
| <a href=#951 id=951 data-nosnippet>951</a> /// is false. Otherwise, and always during CTFE, the error condition is determined as described |
| <a href=#952 id=952 data-nosnippet>952</a> /// below. |
| <a href=#953 id=953 data-nosnippet>953</a> /// |
| <a href=#954 id=954 data-nosnippet>954</a> /// For addition, subtraction, and multiplication on integers the error condition is set when |
| <a href=#955 id=955 data-nosnippet>955</a> /// the infinite precision result would be unequal to the actual result. |
| <a href=#956 id=956 data-nosnippet>956</a> /// |
| <a href=#957 id=957 data-nosnippet>957</a> /// For shift operations on integers the error condition is set when the value of right-hand |
| <a href=#958 id=958 data-nosnippet>958</a> /// side is greater than or equal to the number of bits in the type of the left-hand side, or |
| <a href=#959 id=959 data-nosnippet>959</a> /// when the value of right-hand side is negative. |
| <a href=#960 id=960 data-nosnippet>960</a> /// |
| <a href=#961 id=961 data-nosnippet>961</a> /// Other combinations of types and operators are unsupported. |
| <a href=#962 id=962 data-nosnippet>962</a> </span>CheckedBinaryOp(BinOp, Operand, Operand), |
| <a href=#963 id=963 data-nosnippet>963</a> |
| <a href=#964 id=964 data-nosnippet>964</a> <span class="doccomment">/// Computes a value as described by the operation. |
| <a href=#965 id=965 data-nosnippet>965</a> </span><span class="comment">//NullaryOp(NullOp, Ty), |
| <a href=#966 id=966 data-nosnippet>966</a> </span>NullaryOp(std::convert::Infallible), |
| <a href=#967 id=967 data-nosnippet>967</a> |
| <a href=#968 id=968 data-nosnippet>968</a> <span class="doccomment">/// Exactly like `BinaryOp`, but less operands. |
| <a href=#969 id=969 data-nosnippet>969</a> /// |
| <a href=#970 id=970 data-nosnippet>970</a> /// Also does two's-complement arithmetic. Negation requires a signed integer or a float; |
| <a href=#971 id=971 data-nosnippet>971</a> /// bitwise not requires a signed integer, unsigned integer, or bool. Both operation kinds |
| <a href=#972 id=972 data-nosnippet>972</a> /// return a value with the same type as their operand. |
| <a href=#973 id=973 data-nosnippet>973</a> </span>UnaryOp(UnOp, Operand), |
| <a href=#974 id=974 data-nosnippet>974</a> |
| <a href=#975 id=975 data-nosnippet>975</a> <span class="doccomment">/// Computes the discriminant of the place, returning it as an integer of type |
| <a href=#976 id=976 data-nosnippet>976</a> /// `discriminant_ty`. Returns zero for types without discriminant. |
| <a href=#977 id=977 data-nosnippet>977</a> /// |
| <a href=#978 id=978 data-nosnippet>978</a> /// The validity requirements for the underlying value are undecided for this rvalue, see |
| <a href=#979 id=979 data-nosnippet>979</a> /// [#91095]. Note too that the value of the discriminant is not the same thing as the |
| <a href=#980 id=980 data-nosnippet>980</a> /// variant index; use `discriminant_for_variant` to convert. |
| <a href=#981 id=981 data-nosnippet>981</a> /// |
| <a href=#982 id=982 data-nosnippet>982</a> /// [#91095]: https://github.com/rust-lang/rust/issues/91095 |
| <a href=#983 id=983 data-nosnippet>983</a> </span>Discriminant(Place), |
| <a href=#984 id=984 data-nosnippet>984</a> |
| <a href=#985 id=985 data-nosnippet>985</a> <span class="doccomment">/// Creates an aggregate value, like a tuple or struct. |
| <a href=#986 id=986 data-nosnippet>986</a> /// |
| <a href=#987 id=987 data-nosnippet>987</a> /// This is needed because dataflow analysis needs to distinguish |
| <a href=#988 id=988 data-nosnippet>988</a> /// `dest = Foo { x: ..., y: ... }` from `dest.x = ...; dest.y = ...;` in the case that `Foo` |
| <a href=#989 id=989 data-nosnippet>989</a> /// has a destructor. |
| <a href=#990 id=990 data-nosnippet>990</a> /// |
| <a href=#991 id=991 data-nosnippet>991</a> /// Disallowed after deaggregation for all aggregate kinds except `Array` and `Coroutine`. After |
| <a href=#992 id=992 data-nosnippet>992</a> /// coroutine lowering, `Coroutine` aggregate kinds are disallowed too. |
| <a href=#993 id=993 data-nosnippet>993</a> </span>Aggregate(AggregateKind, Box<[Operand]>), |
| <a href=#994 id=994 data-nosnippet>994</a> |
| <a href=#995 id=995 data-nosnippet>995</a> <span class="doccomment">/// Transmutes a `*mut u8` into shallow-initialized `Box<T>`. |
| <a href=#996 id=996 data-nosnippet>996</a> /// |
| <a href=#997 id=997 data-nosnippet>997</a> /// This is different from a normal transmute because dataflow analysis will treat the box as |
| <a href=#998 id=998 data-nosnippet>998</a> /// initialized but its content as uninitialized. Like other pointer casts, this in general |
| <a href=#999 id=999 data-nosnippet>999</a> /// affects alias analysis. |
| <a href=#1000 id=1000 data-nosnippet>1000</a> </span>ShallowInitBox(Operand, StoredTy), |
| <a href=#1001 id=1001 data-nosnippet>1001</a> |
| <a href=#1002 id=1002 data-nosnippet>1002</a> <span class="doccomment">/// NON STANDARD: allocates memory with the type's layout, and shallow init the box with the resulting pointer. |
| <a href=#1003 id=1003 data-nosnippet>1003</a> </span>ShallowInitBoxWithAlloc(StoredTy), |
| <a href=#1004 id=1004 data-nosnippet>1004</a> |
| <a href=#1005 id=1005 data-nosnippet>1005</a> <span class="doccomment">/// A CopyForDeref is equivalent to a read from a place at the |
| <a href=#1006 id=1006 data-nosnippet>1006</a> /// codegen level, but is treated specially by drop elaboration. When such a read happens, it |
| <a href=#1007 id=1007 data-nosnippet>1007</a> /// is guaranteed (via nature of the mir_opt `Derefer` in rustc_mir_transform/src/deref_separator) |
| <a href=#1008 id=1008 data-nosnippet>1008</a> /// that the only use of the returned value is a deref operation, immediately |
| <a href=#1009 id=1009 data-nosnippet>1009</a> /// followed by one or more projections. Drop elaboration treats this rvalue as if the |
| <a href=#1010 id=1010 data-nosnippet>1010</a> /// read never happened and just projects further. This allows simplifying various MIR |
| <a href=#1011 id=1011 data-nosnippet>1011</a> /// optimizations and codegen backends that previously had to handle deref operations anywhere |
| <a href=#1012 id=1012 data-nosnippet>1012</a> /// in a place. |
| <a href=#1013 id=1013 data-nosnippet>1013</a> </span>CopyForDeref(Place), |
| <a href=#1014 id=1014 data-nosnippet>1014</a>} |
| <a href=#1015 id=1015 data-nosnippet>1015</a> |
| <a href=#1016 id=1016 data-nosnippet>1016</a><span class="attr">#[derive(Debug, PartialEq, Eq, Clone)] |
| <a href=#1017 id=1017 data-nosnippet>1017</a></span><span class="kw">pub enum </span>StatementKind { |
| <a href=#1018 id=1018 data-nosnippet>1018</a> Assign(Place, Rvalue), |
| <a href=#1019 id=1019 data-nosnippet>1019</a> FakeRead(Place), |
| <a href=#1020 id=1020 data-nosnippet>1020</a> <span class="comment">//SetDiscriminant { |
| <a href=#1021 id=1021 data-nosnippet>1021</a> // place: Box<Place>, |
| <a href=#1022 id=1022 data-nosnippet>1022</a> // variant_index: VariantIdx, |
| <a href=#1023 id=1023 data-nosnippet>1023</a> //}, |
| <a href=#1024 id=1024 data-nosnippet>1024</a> </span>Deinit(Place), |
| <a href=#1025 id=1025 data-nosnippet>1025</a> StorageLive(LocalId), |
| <a href=#1026 id=1026 data-nosnippet>1026</a> StorageDead(LocalId), |
| <a href=#1027 id=1027 data-nosnippet>1027</a> <span class="comment">//Retag(RetagKind, Box<Place>), |
| <a href=#1028 id=1028 data-nosnippet>1028</a> //AscribeUserType(Place, UserTypeProjection, Variance), |
| <a href=#1029 id=1029 data-nosnippet>1029</a> //Intrinsic(Box<NonDivergingIntrinsic>), |
| <a href=#1030 id=1030 data-nosnippet>1030</a> </span>Nop, |
| <a href=#1031 id=1031 data-nosnippet>1031</a>} |
| <a href=#1032 id=1032 data-nosnippet>1032</a><span class="kw">impl </span>StatementKind { |
| <a href=#1033 id=1033 data-nosnippet>1033</a> <span class="kw">fn </span>with_span(<span class="self">self</span>, span: MirSpan) -> Statement { |
| <a href=#1034 id=1034 data-nosnippet>1034</a> Statement { kind: <span class="self">self</span>, span } |
| <a href=#1035 id=1035 data-nosnippet>1035</a> } |
| <a href=#1036 id=1036 data-nosnippet>1036</a>} |
| <a href=#1037 id=1037 data-nosnippet>1037</a> |
| <a href=#1038 id=1038 data-nosnippet>1038</a><span class="attr">#[derive(Debug, PartialEq, Eq, Clone)] |
| <a href=#1039 id=1039 data-nosnippet>1039</a></span><span class="kw">pub struct </span>Statement { |
| <a href=#1040 id=1040 data-nosnippet>1040</a> <span class="kw">pub </span>kind: StatementKind, |
| <a href=#1041 id=1041 data-nosnippet>1041</a> <span class="kw">pub </span>span: MirSpan, |
| <a href=#1042 id=1042 data-nosnippet>1042</a>} |
| <a href=#1043 id=1043 data-nosnippet>1043</a> |
| <a href=#1044 id=1044 data-nosnippet>1044</a><span class="attr">#[derive(Debug, Default, Clone, PartialEq, Eq)] |
| <a href=#1045 id=1045 data-nosnippet>1045</a></span><span class="kw">pub struct </span>BasicBlock { |
| <a href=#1046 id=1046 data-nosnippet>1046</a> <span class="doccomment">/// List of statements in this block. |
| <a href=#1047 id=1047 data-nosnippet>1047</a> </span><span class="kw">pub </span>statements: Vec<Statement>, |
| <a href=#1048 id=1048 data-nosnippet>1048</a> |
| <a href=#1049 id=1049 data-nosnippet>1049</a> <span class="doccomment">/// Terminator for this block. |
| <a href=#1050 id=1050 data-nosnippet>1050</a> /// |
| <a href=#1051 id=1051 data-nosnippet>1051</a> /// N.B., this should generally ONLY be `None` during construction. |
| <a href=#1052 id=1052 data-nosnippet>1052</a> /// Therefore, you should generally access it via the |
| <a href=#1053 id=1053 data-nosnippet>1053</a> /// `terminator()` or `terminator_mut()` methods. The only |
| <a href=#1054 id=1054 data-nosnippet>1054</a> /// exception is that certain passes, such as `simplify_cfg`, swap |
| <a href=#1055 id=1055 data-nosnippet>1055</a> /// out the terminator temporarily with `None` while they continue |
| <a href=#1056 id=1056 data-nosnippet>1056</a> /// to recurse over the set of basic blocks. |
| <a href=#1057 id=1057 data-nosnippet>1057</a> </span><span class="kw">pub </span>terminator: <span class="prelude-ty">Option</span><Terminator>, |
| <a href=#1058 id=1058 data-nosnippet>1058</a> |
| <a href=#1059 id=1059 data-nosnippet>1059</a> <span class="doccomment">/// If true, this block lies on an unwind path. This is used |
| <a href=#1060 id=1060 data-nosnippet>1060</a> /// during codegen where distinct kinds of basic blocks may be |
| <a href=#1061 id=1061 data-nosnippet>1061</a> /// generated (particularly for MSVC cleanup). Unwind blocks must |
| <a href=#1062 id=1062 data-nosnippet>1062</a> /// only branch to other unwind blocks. |
| <a href=#1063 id=1063 data-nosnippet>1063</a> </span><span class="kw">pub </span>is_cleanup: bool, |
| <a href=#1064 id=1064 data-nosnippet>1064</a>} |
| <a href=#1065 id=1065 data-nosnippet>1065</a> |
| <a href=#1066 id=1066 data-nosnippet>1066</a><span class="attr">#[derive(Debug, Clone, PartialEq, Eq)] |
| <a href=#1067 id=1067 data-nosnippet>1067</a></span><span class="kw">pub struct </span>MirBody { |
| <a href=#1068 id=1068 data-nosnippet>1068</a> <span class="kw">pub </span>projection_store: ProjectionStore, |
| <a href=#1069 id=1069 data-nosnippet>1069</a> <span class="kw">pub </span>basic_blocks: Arena<BasicBlock>, |
| <a href=#1070 id=1070 data-nosnippet>1070</a> <span class="kw">pub </span>locals: Arena<Local>, |
| <a href=#1071 id=1071 data-nosnippet>1071</a> <span class="kw">pub </span>start_block: BasicBlockId, |
| <a href=#1072 id=1072 data-nosnippet>1072</a> <span class="kw">pub </span>owner: DefWithBodyId, |
| <a href=#1073 id=1073 data-nosnippet>1073</a> <span class="kw">pub </span>binding_locals: ArenaMap<BindingId, LocalId>, |
| <a href=#1074 id=1074 data-nosnippet>1074</a> <span class="kw">pub </span>param_locals: Vec<LocalId>, |
| <a href=#1075 id=1075 data-nosnippet>1075</a> <span class="doccomment">/// This field stores the closures directly owned by this body. It is used |
| <a href=#1076 id=1076 data-nosnippet>1076</a> /// in traversing every mir body. |
| <a href=#1077 id=1077 data-nosnippet>1077</a> </span><span class="kw">pub </span>closures: Vec<InternedClosureId>, |
| <a href=#1078 id=1078 data-nosnippet>1078</a>} |
| <a href=#1079 id=1079 data-nosnippet>1079</a> |
| <a href=#1080 id=1080 data-nosnippet>1080</a><span class="kw">impl </span>MirBody { |
| <a href=#1081 id=1081 data-nosnippet>1081</a> <span class="kw">pub fn </span>local_to_binding_map(<span class="kw-2">&</span><span class="self">self</span>) -> ArenaMap<LocalId, BindingId> { |
| <a href=#1082 id=1082 data-nosnippet>1082</a> <span class="self">self</span>.binding_locals.iter().map(|(it, y)| (<span class="kw-2">*</span>y, it)).collect() |
| <a href=#1083 id=1083 data-nosnippet>1083</a> } |
| <a href=#1084 id=1084 data-nosnippet>1084</a> |
| <a href=#1085 id=1085 data-nosnippet>1085</a> <span class="kw">fn </span>walk_places(<span class="kw-2">&mut </span><span class="self">self</span>, <span class="kw-2">mut </span>f: <span class="kw">impl </span>FnMut(<span class="kw-2">&mut </span>Place, <span class="kw-2">&mut </span>ProjectionStore)) { |
| <a href=#1086 id=1086 data-nosnippet>1086</a> <span class="kw">fn </span>for_operand( |
| <a href=#1087 id=1087 data-nosnippet>1087</a> op: <span class="kw-2">&mut </span>Operand, |
| <a href=#1088 id=1088 data-nosnippet>1088</a> f: <span class="kw-2">&mut </span><span class="kw">impl </span>FnMut(<span class="kw-2">&mut </span>Place, <span class="kw-2">&mut </span>ProjectionStore), |
| <a href=#1089 id=1089 data-nosnippet>1089</a> store: <span class="kw-2">&mut </span>ProjectionStore, |
| <a href=#1090 id=1090 data-nosnippet>1090</a> ) { |
| <a href=#1091 id=1091 data-nosnippet>1091</a> <span class="kw">match </span><span class="kw-2">&mut </span>op.kind { |
| <a href=#1092 id=1092 data-nosnippet>1092</a> OperandKind::Copy(p) | OperandKind::Move(p) => { |
| <a href=#1093 id=1093 data-nosnippet>1093</a> f(p, store); |
| <a href=#1094 id=1094 data-nosnippet>1094</a> } |
| <a href=#1095 id=1095 data-nosnippet>1095</a> OperandKind::Constant { .. } | OperandKind::Static(<span class="kw">_</span>) => (), |
| <a href=#1096 id=1096 data-nosnippet>1096</a> } |
| <a href=#1097 id=1097 data-nosnippet>1097</a> } |
| <a href=#1098 id=1098 data-nosnippet>1098</a> <span class="kw">for </span>(<span class="kw">_</span>, block) <span class="kw">in </span><span class="self">self</span>.basic_blocks.iter_mut() { |
| <a href=#1099 id=1099 data-nosnippet>1099</a> <span class="kw">for </span>statement <span class="kw">in </span><span class="kw-2">&mut </span>block.statements { |
| <a href=#1100 id=1100 data-nosnippet>1100</a> <span class="kw">match </span><span class="kw-2">&mut </span>statement.kind { |
| <a href=#1101 id=1101 data-nosnippet>1101</a> StatementKind::Assign(p, r) => { |
| <a href=#1102 id=1102 data-nosnippet>1102</a> f(p, <span class="kw-2">&mut </span><span class="self">self</span>.projection_store); |
| <a href=#1103 id=1103 data-nosnippet>1103</a> <span class="kw">match </span>r { |
| <a href=#1104 id=1104 data-nosnippet>1104</a> Rvalue::ShallowInitBoxWithAlloc(<span class="kw">_</span>) => (), |
| <a href=#1105 id=1105 data-nosnippet>1105</a> Rvalue::ShallowInitBox(o, <span class="kw">_</span>) |
| <a href=#1106 id=1106 data-nosnippet>1106</a> | Rvalue::UnaryOp(<span class="kw">_</span>, o) |
| <a href=#1107 id=1107 data-nosnippet>1107</a> | Rvalue::Cast(<span class="kw">_</span>, o, <span class="kw">_</span>) |
| <a href=#1108 id=1108 data-nosnippet>1108</a> | Rvalue::Repeat(o, <span class="kw">_</span>) |
| <a href=#1109 id=1109 data-nosnippet>1109</a> | Rvalue::Use(o) => for_operand(o, <span class="kw-2">&mut </span>f, <span class="kw-2">&mut </span><span class="self">self</span>.projection_store), |
| <a href=#1110 id=1110 data-nosnippet>1110</a> Rvalue::CopyForDeref(p) |
| <a href=#1111 id=1111 data-nosnippet>1111</a> | Rvalue::Discriminant(p) |
| <a href=#1112 id=1112 data-nosnippet>1112</a> | Rvalue::Len(p) |
| <a href=#1113 id=1113 data-nosnippet>1113</a> | Rvalue::Ref(<span class="kw">_</span>, p) => f(p, <span class="kw-2">&mut </span><span class="self">self</span>.projection_store), |
| <a href=#1114 id=1114 data-nosnippet>1114</a> Rvalue::CheckedBinaryOp(<span class="kw">_</span>, o1, o2) => { |
| <a href=#1115 id=1115 data-nosnippet>1115</a> for_operand(o1, <span class="kw-2">&mut </span>f, <span class="kw-2">&mut </span><span class="self">self</span>.projection_store); |
| <a href=#1116 id=1116 data-nosnippet>1116</a> for_operand(o2, <span class="kw-2">&mut </span>f, <span class="kw-2">&mut </span><span class="self">self</span>.projection_store); |
| <a href=#1117 id=1117 data-nosnippet>1117</a> } |
| <a href=#1118 id=1118 data-nosnippet>1118</a> Rvalue::Aggregate(<span class="kw">_</span>, ops) => { |
| <a href=#1119 id=1119 data-nosnippet>1119</a> <span class="kw">for </span>op <span class="kw">in </span>ops.iter_mut() { |
| <a href=#1120 id=1120 data-nosnippet>1120</a> for_operand(op, <span class="kw-2">&mut </span>f, <span class="kw-2">&mut </span><span class="self">self</span>.projection_store); |
| <a href=#1121 id=1121 data-nosnippet>1121</a> } |
| <a href=#1122 id=1122 data-nosnippet>1122</a> } |
| <a href=#1123 id=1123 data-nosnippet>1123</a> Rvalue::ThreadLocalRef(n) |
| <a href=#1124 id=1124 data-nosnippet>1124</a> | Rvalue::AddressOf(n) |
| <a href=#1125 id=1125 data-nosnippet>1125</a> | Rvalue::BinaryOp(n) |
| <a href=#1126 id=1126 data-nosnippet>1126</a> | Rvalue::NullaryOp(n) => <span class="kw">match </span><span class="kw-2">*</span>n {}, |
| <a href=#1127 id=1127 data-nosnippet>1127</a> } |
| <a href=#1128 id=1128 data-nosnippet>1128</a> } |
| <a href=#1129 id=1129 data-nosnippet>1129</a> StatementKind::FakeRead(p) | StatementKind::Deinit(p) => { |
| <a href=#1130 id=1130 data-nosnippet>1130</a> f(p, <span class="kw-2">&mut </span><span class="self">self</span>.projection_store) |
| <a href=#1131 id=1131 data-nosnippet>1131</a> } |
| <a href=#1132 id=1132 data-nosnippet>1132</a> StatementKind::StorageLive(<span class="kw">_</span>) |
| <a href=#1133 id=1133 data-nosnippet>1133</a> | StatementKind::StorageDead(<span class="kw">_</span>) |
| <a href=#1134 id=1134 data-nosnippet>1134</a> | StatementKind::Nop => (), |
| <a href=#1135 id=1135 data-nosnippet>1135</a> } |
| <a href=#1136 id=1136 data-nosnippet>1136</a> } |
| <a href=#1137 id=1137 data-nosnippet>1137</a> <span class="kw">match </span><span class="kw-2">&mut </span>block.terminator { |
| <a href=#1138 id=1138 data-nosnippet>1138</a> <span class="prelude-val">Some</span>(x) => <span class="kw">match </span><span class="kw-2">&mut </span>x.kind { |
| <a href=#1139 id=1139 data-nosnippet>1139</a> TerminatorKind::SwitchInt { discr, .. } => { |
| <a href=#1140 id=1140 data-nosnippet>1140</a> for_operand(discr, <span class="kw-2">&mut </span>f, <span class="kw-2">&mut </span><span class="self">self</span>.projection_store) |
| <a href=#1141 id=1141 data-nosnippet>1141</a> } |
| <a href=#1142 id=1142 data-nosnippet>1142</a> TerminatorKind::FalseEdge { .. } |
| <a href=#1143 id=1143 data-nosnippet>1143</a> | TerminatorKind::FalseUnwind { .. } |
| <a href=#1144 id=1144 data-nosnippet>1144</a> | TerminatorKind::Goto { .. } |
| <a href=#1145 id=1145 data-nosnippet>1145</a> | TerminatorKind::UnwindResume |
| <a href=#1146 id=1146 data-nosnippet>1146</a> | TerminatorKind::CoroutineDrop |
| <a href=#1147 id=1147 data-nosnippet>1147</a> | TerminatorKind::Abort |
| <a href=#1148 id=1148 data-nosnippet>1148</a> | TerminatorKind::Return |
| <a href=#1149 id=1149 data-nosnippet>1149</a> | TerminatorKind::Unreachable => (), |
| <a href=#1150 id=1150 data-nosnippet>1150</a> TerminatorKind::Drop { place, .. } => { |
| <a href=#1151 id=1151 data-nosnippet>1151</a> f(place, <span class="kw-2">&mut </span><span class="self">self</span>.projection_store); |
| <a href=#1152 id=1152 data-nosnippet>1152</a> } |
| <a href=#1153 id=1153 data-nosnippet>1153</a> TerminatorKind::DropAndReplace { place, value, .. } => { |
| <a href=#1154 id=1154 data-nosnippet>1154</a> f(place, <span class="kw-2">&mut </span><span class="self">self</span>.projection_store); |
| <a href=#1155 id=1155 data-nosnippet>1155</a> for_operand(value, <span class="kw-2">&mut </span>f, <span class="kw-2">&mut </span><span class="self">self</span>.projection_store); |
| <a href=#1156 id=1156 data-nosnippet>1156</a> } |
| <a href=#1157 id=1157 data-nosnippet>1157</a> TerminatorKind::Call { func, args, destination, .. } => { |
| <a href=#1158 id=1158 data-nosnippet>1158</a> for_operand(func, <span class="kw-2">&mut </span>f, <span class="kw-2">&mut </span><span class="self">self</span>.projection_store); |
| <a href=#1159 id=1159 data-nosnippet>1159</a> args.iter_mut() |
| <a href=#1160 id=1160 data-nosnippet>1160</a> .for_each(|x| for_operand(x, <span class="kw-2">&mut </span>f, <span class="kw-2">&mut </span><span class="self">self</span>.projection_store)); |
| <a href=#1161 id=1161 data-nosnippet>1161</a> f(destination, <span class="kw-2">&mut </span><span class="self">self</span>.projection_store); |
| <a href=#1162 id=1162 data-nosnippet>1162</a> } |
| <a href=#1163 id=1163 data-nosnippet>1163</a> TerminatorKind::Assert { cond, .. } => { |
| <a href=#1164 id=1164 data-nosnippet>1164</a> for_operand(cond, <span class="kw-2">&mut </span>f, <span class="kw-2">&mut </span><span class="self">self</span>.projection_store); |
| <a href=#1165 id=1165 data-nosnippet>1165</a> } |
| <a href=#1166 id=1166 data-nosnippet>1166</a> TerminatorKind::Yield { value, resume_arg, .. } => { |
| <a href=#1167 id=1167 data-nosnippet>1167</a> for_operand(value, <span class="kw-2">&mut </span>f, <span class="kw-2">&mut </span><span class="self">self</span>.projection_store); |
| <a href=#1168 id=1168 data-nosnippet>1168</a> f(resume_arg, <span class="kw-2">&mut </span><span class="self">self</span>.projection_store); |
| <a href=#1169 id=1169 data-nosnippet>1169</a> } |
| <a href=#1170 id=1170 data-nosnippet>1170</a> }, |
| <a href=#1171 id=1171 data-nosnippet>1171</a> <span class="prelude-val">None </span>=> (), |
| <a href=#1172 id=1172 data-nosnippet>1172</a> } |
| <a href=#1173 id=1173 data-nosnippet>1173</a> } |
| <a href=#1174 id=1174 data-nosnippet>1174</a> } |
| <a href=#1175 id=1175 data-nosnippet>1175</a> |
| <a href=#1176 id=1176 data-nosnippet>1176</a> <span class="kw">fn </span>shrink_to_fit(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <a href=#1177 id=1177 data-nosnippet>1177</a> <span class="kw">let </span>MirBody { |
| <a href=#1178 id=1178 data-nosnippet>1178</a> basic_blocks, |
| <a href=#1179 id=1179 data-nosnippet>1179</a> locals, |
| <a href=#1180 id=1180 data-nosnippet>1180</a> start_block: <span class="kw">_</span>, |
| <a href=#1181 id=1181 data-nosnippet>1181</a> owner: <span class="kw">_</span>, |
| <a href=#1182 id=1182 data-nosnippet>1182</a> binding_locals, |
| <a href=#1183 id=1183 data-nosnippet>1183</a> param_locals, |
| <a href=#1184 id=1184 data-nosnippet>1184</a> closures, |
| <a href=#1185 id=1185 data-nosnippet>1185</a> projection_store, |
| <a href=#1186 id=1186 data-nosnippet>1186</a> } = <span class="self">self</span>; |
| <a href=#1187 id=1187 data-nosnippet>1187</a> projection_store.shrink_to_fit(); |
| <a href=#1188 id=1188 data-nosnippet>1188</a> basic_blocks.shrink_to_fit(); |
| <a href=#1189 id=1189 data-nosnippet>1189</a> locals.shrink_to_fit(); |
| <a href=#1190 id=1190 data-nosnippet>1190</a> binding_locals.shrink_to_fit(); |
| <a href=#1191 id=1191 data-nosnippet>1191</a> param_locals.shrink_to_fit(); |
| <a href=#1192 id=1192 data-nosnippet>1192</a> closures.shrink_to_fit(); |
| <a href=#1193 id=1193 data-nosnippet>1193</a> <span class="kw">for </span>(<span class="kw">_</span>, b) <span class="kw">in </span>basic_blocks.iter_mut() { |
| <a href=#1194 id=1194 data-nosnippet>1194</a> <span class="kw">let </span>BasicBlock { statements, terminator: <span class="kw">_</span>, is_cleanup: <span class="kw">_ </span>} = b; |
| <a href=#1195 id=1195 data-nosnippet>1195</a> statements.shrink_to_fit(); |
| <a href=#1196 id=1196 data-nosnippet>1196</a> } |
| <a href=#1197 id=1197 data-nosnippet>1197</a> } |
| <a href=#1198 id=1198 data-nosnippet>1198</a>} |
| <a href=#1199 id=1199 data-nosnippet>1199</a> |
| <a href=#1200 id=1200 data-nosnippet>1200</a><span class="attr">#[derive(Debug, PartialEq, Eq, Clone, Copy)] |
| <a href=#1201 id=1201 data-nosnippet>1201</a></span><span class="kw">pub enum </span>MirSpan { |
| <a href=#1202 id=1202 data-nosnippet>1202</a> ExprId(ExprId), |
| <a href=#1203 id=1203 data-nosnippet>1203</a> PatId(PatId), |
| <a href=#1204 id=1204 data-nosnippet>1204</a> BindingId(BindingId), |
| <a href=#1205 id=1205 data-nosnippet>1205</a> SelfParam, |
| <a href=#1206 id=1206 data-nosnippet>1206</a> Unknown, |
| <a href=#1207 id=1207 data-nosnippet>1207</a>} |
| <a href=#1208 id=1208 data-nosnippet>1208</a> |
| <a href=#1209 id=1209 data-nosnippet>1209</a><span class="kw">impl </span>MirSpan { |
| <a href=#1210 id=1210 data-nosnippet>1210</a> <span class="kw">pub fn </span>is_ref_span(<span class="kw-2">&</span><span class="self">self</span>, body: <span class="kw-2">&</span>Body) -> bool { |
| <a href=#1211 id=1211 data-nosnippet>1211</a> <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{ |
| <a href=#1212 id=1212 data-nosnippet>1212</a> MirSpan::ExprId(expr) => <span class="macro">matches!</span>(body[expr], Expr::Ref { .. }), |
| <a href=#1213 id=1213 data-nosnippet>1213</a> <span class="comment">// FIXME: Figure out if this is correct wrt. match ergonomics. |
| <a href=#1214 id=1214 data-nosnippet>1214</a> </span>MirSpan::BindingId(binding) => { |
| <a href=#1215 id=1215 data-nosnippet>1215</a> <span class="macro">matches!</span>(body[binding].mode, BindingAnnotation::Ref | BindingAnnotation::RefMut) |
| <a href=#1216 id=1216 data-nosnippet>1216</a> } |
| <a href=#1217 id=1217 data-nosnippet>1217</a> MirSpan::PatId(<span class="kw">_</span>) | MirSpan::SelfParam | MirSpan::Unknown => <span class="bool-val">false</span>, |
| <a href=#1218 id=1218 data-nosnippet>1218</a> } |
| <a href=#1219 id=1219 data-nosnippet>1219</a> } |
| <a href=#1220 id=1220 data-nosnippet>1220</a>} |
| <a href=#1221 id=1221 data-nosnippet>1221</a> |
| <a href=#1222 id=1222 data-nosnippet>1222</a><span class="macro">impl_from!</span>(ExprId, PatId <span class="kw">for </span>MirSpan); |
| <a href=#1223 id=1223 data-nosnippet>1223</a> |
| <a href=#1224 id=1224 data-nosnippet>1224</a><span class="kw">impl </span>From<<span class="kw-2">&</span>ExprId> <span class="kw">for </span>MirSpan { |
| <a href=#1225 id=1225 data-nosnippet>1225</a> <span class="kw">fn </span>from(value: <span class="kw-2">&</span>ExprId) -> <span class="self">Self </span>{ |
| <a href=#1226 id=1226 data-nosnippet>1226</a> (<span class="kw-2">*</span>value).into() |
| <a href=#1227 id=1227 data-nosnippet>1227</a> } |
| <a href=#1228 id=1228 data-nosnippet>1228</a>} |
| </code></pre></div></section></main></body></html> |
