| use crate::llvm::{AtomicRmwBinOp, AtomicOrdering, SynchronizationScope}; |
| use crate::llvm::{self, False, BasicBlock}; |
| use crate::common::Funclet; |
| use crate::context::CodegenCx; |
| use crate::type_::Type; |
| use crate::type_of::LayoutLlvmExt; |
| use crate::value::Value; |
| use rustc_codegen_ssa::common::{IntPredicate, TypeKind, RealPredicate}; |
| use rustc_codegen_ssa::MemFlags; |
| use libc::{c_uint, c_char}; |
| use rustc::ty::{self, Ty, TyCtxt}; |
| use rustc::ty::layout::{self, Align, Size, TyLayout}; |
| use rustc::hir::def_id::DefId; |
| use rustc::session::config; |
| use rustc_data_structures::small_c_str::SmallCStr; |
| use rustc_codegen_ssa::traits::*; |
| use rustc_codegen_ssa::base::to_immediate; |
| use rustc_codegen_ssa::mir::operand::{OperandValue, OperandRef}; |
| use rustc_codegen_ssa::mir::place::PlaceRef; |
| use rustc_target::spec::{HasTargetSpec, Target}; |
| use std::borrow::Cow; |
| use std::ffi::CStr; |
| use std::ops::{Deref, Range}; |
| use std::ptr; |
| use std::iter::TrustedLen; |
| |
| // All Builders must have an llfn associated with them |
| #[must_use] |
| pub struct Builder<'a, 'll, 'tcx> { |
| pub llbuilder: &'ll mut llvm::Builder<'ll>, |
| pub cx: &'a CodegenCx<'ll, 'tcx>, |
| } |
| |
| impl Drop for Builder<'a, 'll, 'tcx> { |
| fn drop(&mut self) { |
| unsafe { |
| llvm::LLVMDisposeBuilder(&mut *(self.llbuilder as *mut _)); |
| } |
| } |
| } |
| |
| // FIXME(eddyb) use a checked constructor when they become `const fn`. |
| const EMPTY_C_STR: &CStr = unsafe { |
| CStr::from_bytes_with_nul_unchecked(b"\0") |
| }; |
| |
| /// Empty string, to be used where LLVM expects an instruction name, indicating |
| /// that the instruction is to be left unnamed (i.e. numbered, in textual IR). |
| // FIXME(eddyb) pass `&CStr` directly to FFI once it's a thin pointer. |
| const UNNAMED: *const c_char = EMPTY_C_STR.as_ptr(); |
| |
| impl BackendTypes for Builder<'_, 'll, 'tcx> { |
| type Value = <CodegenCx<'ll, 'tcx> as BackendTypes>::Value; |
| type Function = <CodegenCx<'ll, 'tcx> as BackendTypes>::Function; |
| type BasicBlock = <CodegenCx<'ll, 'tcx> as BackendTypes>::BasicBlock; |
| type Type = <CodegenCx<'ll, 'tcx> as BackendTypes>::Type; |
| type Funclet = <CodegenCx<'ll, 'tcx> as BackendTypes>::Funclet; |
| |
| type DIScope = <CodegenCx<'ll, 'tcx> as BackendTypes>::DIScope; |
| } |
| |
| impl ty::layout::HasDataLayout for Builder<'_, '_, '_> { |
| fn data_layout(&self) -> &ty::layout::TargetDataLayout { |
| self.cx.data_layout() |
| } |
| } |
| |
| impl ty::layout::HasTyCtxt<'tcx> for Builder<'_, '_, 'tcx> { |
| fn tcx(&self) -> TyCtxt<'tcx> { |
| self.cx.tcx |
| } |
| } |
| |
| impl ty::layout::HasParamEnv<'tcx> for Builder<'_, '_, 'tcx> { |
| fn param_env(&self) -> ty::ParamEnv<'tcx> { |
| self.cx.param_env() |
| } |
| } |
| |
| impl HasTargetSpec for Builder<'_, '_, 'tcx> { |
| fn target_spec(&self) -> &Target { |
| &self.cx.target_spec() |
| } |
| } |
| |
| impl ty::layout::LayoutOf for Builder<'_, '_, 'tcx> { |
| type Ty = Ty<'tcx>; |
| type TyLayout = TyLayout<'tcx>; |
| |
| fn layout_of(&self, ty: Ty<'tcx>) -> Self::TyLayout { |
| self.cx.layout_of(ty) |
| } |
| } |
| |
| impl Deref for Builder<'_, 'll, 'tcx> { |
| type Target = CodegenCx<'ll, 'tcx>; |
| |
| fn deref(&self) -> &Self::Target { |
| self.cx |
| } |
| } |
| |
| impl HasCodegen<'tcx> for Builder<'_, 'll, 'tcx> { |
| type CodegenCx = CodegenCx<'ll, 'tcx>; |
| } |
| |
| macro_rules! builder_methods_for_value_instructions { |
| ($($name:ident($($arg:ident),*) => $llvm_capi:ident),+ $(,)?) => { |
| $(fn $name(&mut self, $($arg: &'ll Value),*) -> &'ll Value { |
| unsafe { |
| llvm::$llvm_capi(self.llbuilder, $($arg,)* UNNAMED) |
| } |
| })+ |
| } |
| } |
| |
| impl BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> { |
| fn new_block<'b>( |
| cx: &'a CodegenCx<'ll, 'tcx>, |
| llfn: &'ll Value, |
| name: &'b str |
| ) -> Self { |
| let mut bx = Builder::with_cx(cx); |
| let llbb = unsafe { |
| let name = SmallCStr::new(name); |
| llvm::LLVMAppendBasicBlockInContext( |
| cx.llcx, |
| llfn, |
| name.as_ptr() |
| ) |
| }; |
| bx.position_at_end(llbb); |
| bx |
| } |
| |
| fn with_cx(cx: &'a CodegenCx<'ll, 'tcx>) -> Self { |
| // Create a fresh builder from the crate context. |
| let llbuilder = unsafe { |
| llvm::LLVMCreateBuilderInContext(cx.llcx) |
| }; |
| Builder { |
| llbuilder, |
| cx, |
| } |
| } |
| |
| fn build_sibling_block(&self, name: &str) -> Self { |
| Builder::new_block(self.cx, self.llfn(), name) |
| } |
| |
| fn llbb(&self) -> &'ll BasicBlock { |
| unsafe { |
| llvm::LLVMGetInsertBlock(self.llbuilder) |
| } |
| } |
| |
| fn position_at_end(&mut self, llbb: &'ll BasicBlock) { |
| unsafe { |
| llvm::LLVMPositionBuilderAtEnd(self.llbuilder, llbb); |
| } |
| } |
| |
| fn ret_void(&mut self) { |
| unsafe { |
| llvm::LLVMBuildRetVoid(self.llbuilder); |
| } |
| } |
| |
| fn ret(&mut self, v: &'ll Value) { |
| unsafe { |
| llvm::LLVMBuildRet(self.llbuilder, v); |
| } |
| } |
| |
| fn br(&mut self, dest: &'ll BasicBlock) { |
| unsafe { |
| llvm::LLVMBuildBr(self.llbuilder, dest); |
| } |
| } |
| |
| fn cond_br( |
| &mut self, |
| cond: &'ll Value, |
| then_llbb: &'ll BasicBlock, |
| else_llbb: &'ll BasicBlock, |
| ) { |
| unsafe { |
| llvm::LLVMBuildCondBr(self.llbuilder, cond, then_llbb, else_llbb); |
| } |
| } |
| |
| fn switch( |
| &mut self, |
| v: &'ll Value, |
| else_llbb: &'ll BasicBlock, |
| cases: impl ExactSizeIterator<Item = (u128, &'ll BasicBlock)> + TrustedLen, |
| ) { |
| let switch = unsafe { |
| llvm::LLVMBuildSwitch(self.llbuilder, v, else_llbb, cases.len() as c_uint) |
| }; |
| for (on_val, dest) in cases { |
| let on_val = self.const_uint_big(self.val_ty(v), on_val); |
| unsafe { |
| llvm::LLVMAddCase(switch, on_val, dest) |
| } |
| } |
| } |
| |
| fn invoke( |
| &mut self, |
| llfn: &'ll Value, |
| args: &[&'ll Value], |
| then: &'ll BasicBlock, |
| catch: &'ll BasicBlock, |
| funclet: Option<&Funclet<'ll>>, |
| ) -> &'ll Value { |
| |
| debug!("invoke {:?} with args ({:?})", |
| llfn, |
| args); |
| |
| let args = self.check_call("invoke", llfn, args); |
| let bundle = funclet.map(|funclet| funclet.bundle()); |
| let bundle = bundle.as_ref().map(|b| &*b.raw); |
| |
| unsafe { |
| llvm::LLVMRustBuildInvoke(self.llbuilder, |
| llfn, |
| args.as_ptr(), |
| args.len() as c_uint, |
| then, |
| catch, |
| bundle, |
| UNNAMED) |
| } |
| } |
| |
| fn unreachable(&mut self) { |
| unsafe { |
| llvm::LLVMBuildUnreachable(self.llbuilder); |
| } |
| } |
| |
| builder_methods_for_value_instructions! { |
| add(a, b) => LLVMBuildAdd, |
| fadd(a, b) => LLVMBuildFAdd, |
| sub(a, b) => LLVMBuildSub, |
| fsub(a, b) => LLVMBuildFSub, |
| mul(a, b) => LLVMBuildMul, |
| fmul(a, b) => LLVMBuildFMul, |
| udiv(a, b) => LLVMBuildUDiv, |
| exactudiv(a, b) => LLVMBuildExactUDiv, |
| sdiv(a, b) => LLVMBuildSDiv, |
| exactsdiv(a, b) => LLVMBuildExactSDiv, |
| fdiv(a, b) => LLVMBuildFDiv, |
| urem(a, b) => LLVMBuildURem, |
| srem(a, b) => LLVMBuildSRem, |
| frem(a, b) => LLVMBuildFRem, |
| shl(a, b) => LLVMBuildShl, |
| lshr(a, b) => LLVMBuildLShr, |
| ashr(a, b) => LLVMBuildAShr, |
| and(a, b) => LLVMBuildAnd, |
| or(a, b) => LLVMBuildOr, |
| xor(a, b) => LLVMBuildXor, |
| neg(x) => LLVMBuildNeg, |
| fneg(x) => LLVMBuildFNeg, |
| not(x) => LLVMBuildNot, |
| unchecked_sadd(x, y) => LLVMBuildNSWAdd, |
| unchecked_uadd(x, y) => LLVMBuildNUWAdd, |
| unchecked_ssub(x, y) => LLVMBuildNSWSub, |
| unchecked_usub(x, y) => LLVMBuildNUWSub, |
| unchecked_smul(x, y) => LLVMBuildNSWMul, |
| unchecked_umul(x, y) => LLVMBuildNUWMul, |
| } |
| |
| fn fadd_fast(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value { |
| unsafe { |
| let instr = llvm::LLVMBuildFAdd(self.llbuilder, lhs, rhs, UNNAMED); |
| llvm::LLVMRustSetHasUnsafeAlgebra(instr); |
| instr |
| } |
| } |
| |
| fn fsub_fast(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value { |
| unsafe { |
| let instr = llvm::LLVMBuildFSub(self.llbuilder, lhs, rhs, UNNAMED); |
| llvm::LLVMRustSetHasUnsafeAlgebra(instr); |
| instr |
| } |
| } |
| |
| fn fmul_fast(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value { |
| unsafe { |
| let instr = llvm::LLVMBuildFMul(self.llbuilder, lhs, rhs, UNNAMED); |
| llvm::LLVMRustSetHasUnsafeAlgebra(instr); |
| instr |
| } |
| } |
| |
| fn fdiv_fast(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value { |
| unsafe { |
| let instr = llvm::LLVMBuildFDiv(self.llbuilder, lhs, rhs, UNNAMED); |
| llvm::LLVMRustSetHasUnsafeAlgebra(instr); |
| instr |
| } |
| } |
| |
| fn frem_fast(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value { |
| unsafe { |
| let instr = llvm::LLVMBuildFRem(self.llbuilder, lhs, rhs, UNNAMED); |
| llvm::LLVMRustSetHasUnsafeAlgebra(instr); |
| instr |
| } |
| } |
| |
| fn checked_binop( |
| &mut self, |
| oop: OverflowOp, |
| ty: Ty<'_>, |
| lhs: Self::Value, |
| rhs: Self::Value, |
| ) -> (Self::Value, Self::Value) { |
| use syntax::ast::IntTy::*; |
| use syntax::ast::UintTy::*; |
| use rustc::ty::{Int, Uint}; |
| |
| let new_kind = match ty.kind { |
| Int(t @ Isize) => Int(t.normalize(self.tcx.sess.target.ptr_width)), |
| Uint(t @ Usize) => Uint(t.normalize(self.tcx.sess.target.ptr_width)), |
| ref t @ Uint(_) | ref t @ Int(_) => t.clone(), |
| _ => panic!("tried to get overflow intrinsic for op applied to non-int type") |
| }; |
| |
| let name = match oop { |
| OverflowOp::Add => match new_kind { |
| Int(I8) => "llvm.sadd.with.overflow.i8", |
| Int(I16) => "llvm.sadd.with.overflow.i16", |
| Int(I32) => "llvm.sadd.with.overflow.i32", |
| Int(I64) => "llvm.sadd.with.overflow.i64", |
| Int(I128) => "llvm.sadd.with.overflow.i128", |
| |
| Uint(U8) => "llvm.uadd.with.overflow.i8", |
| Uint(U16) => "llvm.uadd.with.overflow.i16", |
| Uint(U32) => "llvm.uadd.with.overflow.i32", |
| Uint(U64) => "llvm.uadd.with.overflow.i64", |
| Uint(U128) => "llvm.uadd.with.overflow.i128", |
| |
| _ => unreachable!(), |
| }, |
| OverflowOp::Sub => match new_kind { |
| Int(I8) => "llvm.ssub.with.overflow.i8", |
| Int(I16) => "llvm.ssub.with.overflow.i16", |
| Int(I32) => "llvm.ssub.with.overflow.i32", |
| Int(I64) => "llvm.ssub.with.overflow.i64", |
| Int(I128) => "llvm.ssub.with.overflow.i128", |
| |
| Uint(U8) => "llvm.usub.with.overflow.i8", |
| Uint(U16) => "llvm.usub.with.overflow.i16", |
| Uint(U32) => "llvm.usub.with.overflow.i32", |
| Uint(U64) => "llvm.usub.with.overflow.i64", |
| Uint(U128) => "llvm.usub.with.overflow.i128", |
| |
| _ => unreachable!(), |
| }, |
| OverflowOp::Mul => match new_kind { |
| Int(I8) => "llvm.smul.with.overflow.i8", |
| Int(I16) => "llvm.smul.with.overflow.i16", |
| Int(I32) => "llvm.smul.with.overflow.i32", |
| Int(I64) => "llvm.smul.with.overflow.i64", |
| Int(I128) => "llvm.smul.with.overflow.i128", |
| |
| Uint(U8) => "llvm.umul.with.overflow.i8", |
| Uint(U16) => "llvm.umul.with.overflow.i16", |
| Uint(U32) => "llvm.umul.with.overflow.i32", |
| Uint(U64) => "llvm.umul.with.overflow.i64", |
| Uint(U128) => "llvm.umul.with.overflow.i128", |
| |
| _ => unreachable!(), |
| }, |
| }; |
| |
| let intrinsic = self.get_intrinsic(&name); |
| let res = self.call(intrinsic, &[lhs, rhs], None); |
| ( |
| self.extract_value(res, 0), |
| self.extract_value(res, 1), |
| ) |
| } |
| |
| fn alloca(&mut self, ty: &'ll Type, align: Align) -> &'ll Value { |
| let mut bx = Builder::with_cx(self.cx); |
| bx.position_at_start(unsafe { |
| llvm::LLVMGetFirstBasicBlock(self.llfn()) |
| }); |
| bx.dynamic_alloca(ty, align) |
| } |
| |
| fn dynamic_alloca(&mut self, ty: &'ll Type, align: Align) -> &'ll Value { |
| unsafe { |
| let alloca = llvm::LLVMBuildAlloca(self.llbuilder, ty, UNNAMED); |
| llvm::LLVMSetAlignment(alloca, align.bytes() as c_uint); |
| alloca |
| } |
| } |
| |
| fn array_alloca(&mut self, |
| ty: &'ll Type, |
| len: &'ll Value, |
| align: Align) -> &'ll Value { |
| unsafe { |
| let alloca = llvm::LLVMBuildArrayAlloca(self.llbuilder, ty, len, UNNAMED); |
| llvm::LLVMSetAlignment(alloca, align.bytes() as c_uint); |
| alloca |
| } |
| } |
| |
| fn load(&mut self, ptr: &'ll Value, align: Align) -> &'ll Value { |
| unsafe { |
| let load = llvm::LLVMBuildLoad(self.llbuilder, ptr, UNNAMED); |
| llvm::LLVMSetAlignment(load, align.bytes() as c_uint); |
| load |
| } |
| } |
| |
| fn volatile_load(&mut self, ptr: &'ll Value) -> &'ll Value { |
| unsafe { |
| let load = llvm::LLVMBuildLoad(self.llbuilder, ptr, UNNAMED); |
| llvm::LLVMSetVolatile(load, llvm::True); |
| load |
| } |
| } |
| |
| fn atomic_load( |
| &mut self, |
| ptr: &'ll Value, |
| order: rustc_codegen_ssa::common::AtomicOrdering, |
| size: Size, |
| ) -> &'ll Value { |
| unsafe { |
| let load = llvm::LLVMRustBuildAtomicLoad( |
| self.llbuilder, |
| ptr, |
| UNNAMED, |
| AtomicOrdering::from_generic(order), |
| ); |
| // LLVM requires the alignment of atomic loads to be at least the size of the type. |
| llvm::LLVMSetAlignment(load, size.bytes() as c_uint); |
| load |
| } |
| } |
| |
| fn load_operand( |
| &mut self, |
| place: PlaceRef<'tcx, &'ll Value> |
| ) -> OperandRef<'tcx, &'ll Value> { |
| debug!("PlaceRef::load: {:?}", place); |
| |
| assert_eq!(place.llextra.is_some(), place.layout.is_unsized()); |
| |
| if place.layout.is_zst() { |
| return OperandRef::new_zst(self, place.layout); |
| } |
| |
| fn scalar_load_metadata<'a, 'll, 'tcx>( |
| bx: &mut Builder<'a, 'll, 'tcx>, |
| load: &'ll Value, |
| scalar: &layout::Scalar |
| ) { |
| let vr = scalar.valid_range.clone(); |
| match scalar.value { |
| layout::Int(..) => { |
| let range = scalar.valid_range_exclusive(bx); |
| if range.start != range.end { |
| bx.range_metadata(load, range); |
| } |
| } |
| layout::Pointer if vr.start() < vr.end() && !vr.contains(&0) => { |
| bx.nonnull_metadata(load); |
| } |
| _ => {} |
| } |
| } |
| |
| let val = if let Some(llextra) = place.llextra { |
| OperandValue::Ref(place.llval, Some(llextra), place.align) |
| } else if place.layout.is_llvm_immediate() { |
| let mut const_llval = None; |
| unsafe { |
| if let Some(global) = llvm::LLVMIsAGlobalVariable(place.llval) { |
| if llvm::LLVMIsGlobalConstant(global) == llvm::True { |
| const_llval = llvm::LLVMGetInitializer(global); |
| } |
| } |
| } |
| let llval = const_llval.unwrap_or_else(|| { |
| let load = self.load(place.llval, place.align); |
| if let layout::Abi::Scalar(ref scalar) = place.layout.abi { |
| scalar_load_metadata(self, load, scalar); |
| } |
| load |
| }); |
| OperandValue::Immediate(to_immediate(self, llval, place.layout)) |
| } else if let layout::Abi::ScalarPair(ref a, ref b) = place.layout.abi { |
| let b_offset = a.value.size(self).align_to(b.value.align(self).abi); |
| |
| let mut load = |i, scalar: &layout::Scalar, align| { |
| let llptr = self.struct_gep(place.llval, i as u64); |
| let load = self.load(llptr, align); |
| scalar_load_metadata(self, load, scalar); |
| if scalar.is_bool() { |
| self.trunc(load, self.type_i1()) |
| } else { |
| load |
| } |
| }; |
| |
| OperandValue::Pair( |
| load(0, a, place.align), |
| load(1, b, place.align.restrict_for_offset(b_offset)), |
| ) |
| } else { |
| OperandValue::Ref(place.llval, None, place.align) |
| }; |
| |
| OperandRef { val, layout: place.layout } |
| } |
| |
| fn write_operand_repeatedly( |
| mut self, |
| cg_elem: OperandRef<'tcx, &'ll Value>, |
| count: u64, |
| dest: PlaceRef<'tcx, &'ll Value>, |
| ) -> Self { |
| let zero = self.const_usize(0); |
| let count = self.const_usize(count); |
| let start = dest.project_index(&mut self, zero).llval; |
| let end = dest.project_index(&mut self, count).llval; |
| |
| let mut header_bx = self.build_sibling_block("repeat_loop_header"); |
| let mut body_bx = self.build_sibling_block("repeat_loop_body"); |
| let next_bx = self.build_sibling_block("repeat_loop_next"); |
| |
| self.br(header_bx.llbb()); |
| let current = header_bx.phi(self.val_ty(start), &[start], &[self.llbb()]); |
| |
| let keep_going = header_bx.icmp(IntPredicate::IntNE, current, end); |
| header_bx.cond_br(keep_going, body_bx.llbb(), next_bx.llbb()); |
| |
| let align = dest.align.restrict_for_offset(dest.layout.field(self.cx(), 0).size); |
| cg_elem.val.store(&mut body_bx, |
| PlaceRef::new_sized_aligned(current, cg_elem.layout, align)); |
| |
| let next = body_bx.inbounds_gep(current, &[self.const_usize(1)]); |
| body_bx.br(header_bx.llbb()); |
| header_bx.add_incoming_to_phi(current, next, body_bx.llbb()); |
| |
| next_bx |
| } |
| |
| fn range_metadata(&mut self, load: &'ll Value, range: Range<u128>) { |
| if self.sess().target.target.arch == "amdgpu" { |
| // amdgpu/LLVM does something weird and thinks a i64 value is |
| // split into a v2i32, halving the bitwidth LLVM expects, |
| // tripping an assertion. So, for now, just disable this |
| // optimization. |
| return; |
| } |
| |
| unsafe { |
| let llty = self.cx.val_ty(load); |
| let v = [ |
| self.cx.const_uint_big(llty, range.start), |
| self.cx.const_uint_big(llty, range.end) |
| ]; |
| |
| llvm::LLVMSetMetadata(load, llvm::MD_range as c_uint, |
| llvm::LLVMMDNodeInContext(self.cx.llcx, |
| v.as_ptr(), |
| v.len() as c_uint)); |
| } |
| } |
| |
| fn nonnull_metadata(&mut self, load: &'ll Value) { |
| unsafe { |
| llvm::LLVMSetMetadata(load, llvm::MD_nonnull as c_uint, |
| llvm::LLVMMDNodeInContext(self.cx.llcx, ptr::null(), 0)); |
| } |
| } |
| |
| fn store(&mut self, val: &'ll Value, ptr: &'ll Value, align: Align) -> &'ll Value { |
| self.store_with_flags(val, ptr, align, MemFlags::empty()) |
| } |
| |
| fn store_with_flags( |
| &mut self, |
| val: &'ll Value, |
| ptr: &'ll Value, |
| align: Align, |
| flags: MemFlags, |
| ) -> &'ll Value { |
| debug!("Store {:?} -> {:?} ({:?})", val, ptr, flags); |
| let ptr = self.check_store(val, ptr); |
| unsafe { |
| let store = llvm::LLVMBuildStore(self.llbuilder, val, ptr); |
| let align = if flags.contains(MemFlags::UNALIGNED) { |
| 1 |
| } else { |
| align.bytes() as c_uint |
| }; |
| llvm::LLVMSetAlignment(store, align); |
| if flags.contains(MemFlags::VOLATILE) { |
| llvm::LLVMSetVolatile(store, llvm::True); |
| } |
| if flags.contains(MemFlags::NONTEMPORAL) { |
| // According to LLVM [1] building a nontemporal store must |
| // *always* point to a metadata value of the integer 1. |
| // |
| // [1]: http://llvm.org/docs/LangRef.html#store-instruction |
| let one = self.cx.const_i32(1); |
| let node = llvm::LLVMMDNodeInContext(self.cx.llcx, &one, 1); |
| llvm::LLVMSetMetadata(store, llvm::MD_nontemporal as c_uint, node); |
| } |
| store |
| } |
| } |
| |
| fn atomic_store(&mut self, val: &'ll Value, ptr: &'ll Value, |
| order: rustc_codegen_ssa::common::AtomicOrdering, size: Size) { |
| debug!("Store {:?} -> {:?}", val, ptr); |
| let ptr = self.check_store(val, ptr); |
| unsafe { |
| let store = llvm::LLVMRustBuildAtomicStore( |
| self.llbuilder, |
| val, |
| ptr, |
| AtomicOrdering::from_generic(order), |
| ); |
| // LLVM requires the alignment of atomic stores to be at least the size of the type. |
| llvm::LLVMSetAlignment(store, size.bytes() as c_uint); |
| } |
| } |
| |
| fn gep(&mut self, ptr: &'ll Value, indices: &[&'ll Value]) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildGEP(self.llbuilder, ptr, indices.as_ptr(), |
| indices.len() as c_uint, UNNAMED) |
| } |
| } |
| |
| fn inbounds_gep(&mut self, ptr: &'ll Value, indices: &[&'ll Value]) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildInBoundsGEP( |
| self.llbuilder, ptr, indices.as_ptr(), indices.len() as c_uint, UNNAMED) |
| } |
| } |
| |
| fn struct_gep(&mut self, ptr: &'ll Value, idx: u64) -> &'ll Value { |
| assert_eq!(idx as c_uint as u64, idx); |
| unsafe { |
| llvm::LLVMBuildStructGEP(self.llbuilder, ptr, idx as c_uint, UNNAMED) |
| } |
| } |
| |
| /* Casts */ |
| fn trunc(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildTrunc(self.llbuilder, val, dest_ty, UNNAMED) |
| } |
| } |
| |
| fn sext(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildSExt(self.llbuilder, val, dest_ty, UNNAMED) |
| } |
| } |
| |
| fn fptoui(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildFPToUI(self.llbuilder, val, dest_ty, UNNAMED) |
| } |
| } |
| |
| fn fptosi(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildFPToSI(self.llbuilder, val, dest_ty,UNNAMED) |
| } |
| } |
| |
| fn uitofp(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildUIToFP(self.llbuilder, val, dest_ty, UNNAMED) |
| } |
| } |
| |
| fn sitofp(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildSIToFP(self.llbuilder, val, dest_ty, UNNAMED) |
| } |
| } |
| |
| fn fptrunc(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildFPTrunc(self.llbuilder, val, dest_ty, UNNAMED) |
| } |
| } |
| |
| fn fpext(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildFPExt(self.llbuilder, val, dest_ty, UNNAMED) |
| } |
| } |
| |
| fn ptrtoint(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildPtrToInt(self.llbuilder, val, dest_ty, UNNAMED) |
| } |
| } |
| |
| fn inttoptr(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildIntToPtr(self.llbuilder, val, dest_ty, UNNAMED) |
| } |
| } |
| |
| fn bitcast(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildBitCast(self.llbuilder, val, dest_ty, UNNAMED) |
| } |
| } |
| |
| |
| fn intcast(&mut self, val: &'ll Value, dest_ty: &'ll Type, is_signed: bool) -> &'ll Value { |
| unsafe { |
| llvm::LLVMRustBuildIntCast(self.llbuilder, val, dest_ty, is_signed) |
| } |
| } |
| |
| fn pointercast(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildPointerCast(self.llbuilder, val, dest_ty, UNNAMED) |
| } |
| } |
| |
| /* Comparisons */ |
| fn icmp(&mut self, op: IntPredicate, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value { |
| let op = llvm::IntPredicate::from_generic(op); |
| unsafe { |
| llvm::LLVMBuildICmp(self.llbuilder, op as c_uint, lhs, rhs, UNNAMED) |
| } |
| } |
| |
| fn fcmp(&mut self, op: RealPredicate, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildFCmp(self.llbuilder, op as c_uint, lhs, rhs, UNNAMED) |
| } |
| } |
| |
| /* Miscellaneous instructions */ |
| fn memcpy(&mut self, dst: &'ll Value, dst_align: Align, |
| src: &'ll Value, src_align: Align, |
| size: &'ll Value, flags: MemFlags) { |
| if flags.contains(MemFlags::NONTEMPORAL) { |
| // HACK(nox): This is inefficient but there is no nontemporal memcpy. |
| let val = self.load(src, src_align); |
| let ptr = self.pointercast(dst, self.type_ptr_to(self.val_ty(val))); |
| self.store_with_flags(val, ptr, dst_align, flags); |
| return; |
| } |
| let size = self.intcast(size, self.type_isize(), false); |
| let is_volatile = flags.contains(MemFlags::VOLATILE); |
| let dst = self.pointercast(dst, self.type_i8p()); |
| let src = self.pointercast(src, self.type_i8p()); |
| unsafe { |
| llvm::LLVMRustBuildMemCpy(self.llbuilder, dst, dst_align.bytes() as c_uint, |
| src, src_align.bytes() as c_uint, size, is_volatile); |
| } |
| } |
| |
| fn memmove(&mut self, dst: &'ll Value, dst_align: Align, |
| src: &'ll Value, src_align: Align, |
| size: &'ll Value, flags: MemFlags) { |
| if flags.contains(MemFlags::NONTEMPORAL) { |
| // HACK(nox): This is inefficient but there is no nontemporal memmove. |
| let val = self.load(src, src_align); |
| let ptr = self.pointercast(dst, self.type_ptr_to(self.val_ty(val))); |
| self.store_with_flags(val, ptr, dst_align, flags); |
| return; |
| } |
| let size = self.intcast(size, self.type_isize(), false); |
| let is_volatile = flags.contains(MemFlags::VOLATILE); |
| let dst = self.pointercast(dst, self.type_i8p()); |
| let src = self.pointercast(src, self.type_i8p()); |
| unsafe { |
| llvm::LLVMRustBuildMemMove(self.llbuilder, dst, dst_align.bytes() as c_uint, |
| src, src_align.bytes() as c_uint, size, is_volatile); |
| } |
| } |
| |
| fn memset( |
| &mut self, |
| ptr: &'ll Value, |
| fill_byte: &'ll Value, |
| size: &'ll Value, |
| align: Align, |
| flags: MemFlags, |
| ) { |
| let ptr_width = &self.sess().target.target.target_pointer_width; |
| let intrinsic_key = format!("llvm.memset.p0i8.i{}", ptr_width); |
| let llintrinsicfn = self.get_intrinsic(&intrinsic_key); |
| let ptr = self.pointercast(ptr, self.type_i8p()); |
| let align = self.const_u32(align.bytes() as u32); |
| let volatile = self.const_bool(flags.contains(MemFlags::VOLATILE)); |
| self.call(llintrinsicfn, &[ptr, fill_byte, size, align, volatile], None); |
| } |
| |
| fn select( |
| &mut self, cond: &'ll Value, |
| then_val: &'ll Value, |
| else_val: &'ll Value, |
| ) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildSelect(self.llbuilder, cond, then_val, else_val, UNNAMED) |
| } |
| } |
| |
| #[allow(dead_code)] |
| fn va_arg(&mut self, list: &'ll Value, ty: &'ll Type) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildVAArg(self.llbuilder, list, ty, UNNAMED) |
| } |
| } |
| |
| fn extract_element(&mut self, vec: &'ll Value, idx: &'ll Value) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildExtractElement(self.llbuilder, vec, idx, UNNAMED) |
| } |
| } |
| |
| fn vector_splat(&mut self, num_elts: usize, elt: &'ll Value) -> &'ll Value { |
| unsafe { |
| let elt_ty = self.cx.val_ty(elt); |
| let undef = llvm::LLVMGetUndef(self.type_vector(elt_ty, num_elts as u64)); |
| let vec = self.insert_element(undef, elt, self.cx.const_i32(0)); |
| let vec_i32_ty = self.type_vector(self.type_i32(), num_elts as u64); |
| self.shuffle_vector(vec, undef, self.const_null(vec_i32_ty)) |
| } |
| } |
| |
| fn extract_value(&mut self, agg_val: &'ll Value, idx: u64) -> &'ll Value { |
| assert_eq!(idx as c_uint as u64, idx); |
| unsafe { |
| llvm::LLVMBuildExtractValue(self.llbuilder, agg_val, idx as c_uint, UNNAMED) |
| } |
| } |
| |
| fn insert_value(&mut self, agg_val: &'ll Value, elt: &'ll Value, |
| idx: u64) -> &'ll Value { |
| assert_eq!(idx as c_uint as u64, idx); |
| unsafe { |
| llvm::LLVMBuildInsertValue(self.llbuilder, agg_val, elt, idx as c_uint, |
| UNNAMED) |
| } |
| } |
| |
| fn landing_pad(&mut self, ty: &'ll Type, pers_fn: &'ll Value, |
| num_clauses: usize) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildLandingPad(self.llbuilder, ty, pers_fn, |
| num_clauses as c_uint, UNNAMED) |
| } |
| } |
| |
| fn set_cleanup(&mut self, landing_pad: &'ll Value) { |
| unsafe { |
| llvm::LLVMSetCleanup(landing_pad, llvm::True); |
| } |
| } |
| |
| fn resume(&mut self, exn: &'ll Value) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildResume(self.llbuilder, exn) |
| } |
| } |
| |
| fn cleanup_pad(&mut self, |
| parent: Option<&'ll Value>, |
| args: &[&'ll Value]) -> Funclet<'ll> { |
| let name = const_cstr!("cleanuppad"); |
| let ret = unsafe { |
| llvm::LLVMRustBuildCleanupPad(self.llbuilder, |
| parent, |
| args.len() as c_uint, |
| args.as_ptr(), |
| name.as_ptr()) |
| }; |
| Funclet::new(ret.expect("LLVM does not have support for cleanuppad")) |
| } |
| |
| fn cleanup_ret( |
| &mut self, funclet: &Funclet<'ll>, |
| unwind: Option<&'ll BasicBlock>, |
| ) -> &'ll Value { |
| let ret = unsafe { |
| llvm::LLVMRustBuildCleanupRet(self.llbuilder, funclet.cleanuppad(), unwind) |
| }; |
| ret.expect("LLVM does not have support for cleanupret") |
| } |
| |
| fn catch_pad(&mut self, |
| parent: &'ll Value, |
| args: &[&'ll Value]) -> Funclet<'ll> { |
| let name = const_cstr!("catchpad"); |
| let ret = unsafe { |
| llvm::LLVMRustBuildCatchPad(self.llbuilder, parent, |
| args.len() as c_uint, args.as_ptr(), |
| name.as_ptr()) |
| }; |
| Funclet::new(ret.expect("LLVM does not have support for catchpad")) |
| } |
| |
| fn catch_switch( |
| &mut self, |
| parent: Option<&'ll Value>, |
| unwind: Option<&'ll BasicBlock>, |
| num_handlers: usize, |
| ) -> &'ll Value { |
| let name = const_cstr!("catchswitch"); |
| let ret = unsafe { |
| llvm::LLVMRustBuildCatchSwitch(self.llbuilder, parent, unwind, |
| num_handlers as c_uint, |
| name.as_ptr()) |
| }; |
| ret.expect("LLVM does not have support for catchswitch") |
| } |
| |
| fn add_handler(&mut self, catch_switch: &'ll Value, handler: &'ll BasicBlock) { |
| unsafe { |
| llvm::LLVMRustAddHandler(catch_switch, handler); |
| } |
| } |
| |
| fn set_personality_fn(&mut self, personality: &'ll Value) { |
| unsafe { |
| llvm::LLVMSetPersonalityFn(self.llfn(), personality); |
| } |
| } |
| |
| // Atomic Operations |
| fn atomic_cmpxchg( |
| &mut self, |
| dst: &'ll Value, |
| cmp: &'ll Value, |
| src: &'ll Value, |
| order: rustc_codegen_ssa::common::AtomicOrdering, |
| failure_order: rustc_codegen_ssa::common::AtomicOrdering, |
| weak: bool, |
| ) -> &'ll Value { |
| let weak = if weak { llvm::True } else { llvm::False }; |
| unsafe { |
| llvm::LLVMRustBuildAtomicCmpXchg( |
| self.llbuilder, |
| dst, |
| cmp, |
| src, |
| AtomicOrdering::from_generic(order), |
| AtomicOrdering::from_generic(failure_order), |
| weak |
| ) |
| } |
| } |
| fn atomic_rmw( |
| &mut self, |
| op: rustc_codegen_ssa::common::AtomicRmwBinOp, |
| dst: &'ll Value, |
| src: &'ll Value, |
| order: rustc_codegen_ssa::common::AtomicOrdering, |
| ) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildAtomicRMW( |
| self.llbuilder, |
| AtomicRmwBinOp::from_generic(op), |
| dst, |
| src, |
| AtomicOrdering::from_generic(order), |
| False) |
| } |
| } |
| |
| fn atomic_fence( |
| &mut self, |
| order: rustc_codegen_ssa::common::AtomicOrdering, |
| scope: rustc_codegen_ssa::common::SynchronizationScope |
| ) { |
| unsafe { |
| llvm::LLVMRustBuildAtomicFence( |
| self.llbuilder, |
| AtomicOrdering::from_generic(order), |
| SynchronizationScope::from_generic(scope) |
| ); |
| } |
| } |
| |
| fn set_invariant_load(&mut self, load: &'ll Value) { |
| unsafe { |
| llvm::LLVMSetMetadata(load, llvm::MD_invariant_load as c_uint, |
| llvm::LLVMMDNodeInContext(self.cx.llcx, ptr::null(), 0)); |
| } |
| } |
| |
| fn lifetime_start(&mut self, ptr: &'ll Value, size: Size) { |
| self.call_lifetime_intrinsic("llvm.lifetime.start", ptr, size); |
| } |
| |
| fn lifetime_end(&mut self, ptr: &'ll Value, size: Size) { |
| self.call_lifetime_intrinsic("llvm.lifetime.end", ptr, size); |
| } |
| |
| fn call( |
| &mut self, |
| llfn: &'ll Value, |
| args: &[&'ll Value], |
| funclet: Option<&Funclet<'ll>>, |
| ) -> &'ll Value { |
| |
| debug!("call {:?} with args ({:?})", |
| llfn, |
| args); |
| |
| let args = self.check_call("call", llfn, args); |
| let bundle = funclet.map(|funclet| funclet.bundle()); |
| let bundle = bundle.as_ref().map(|b| &*b.raw); |
| |
| unsafe { |
| llvm::LLVMRustBuildCall( |
| self.llbuilder, |
| llfn, |
| args.as_ptr() as *const &llvm::Value, |
| args.len() as c_uint, |
| bundle, UNNAMED |
| ) |
| } |
| } |
| |
| fn zext(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildZExt(self.llbuilder, val, dest_ty, UNNAMED) |
| } |
| } |
| |
| |
| fn cx(&self) -> &CodegenCx<'ll, 'tcx> { |
| self.cx |
| } |
| |
| unsafe fn delete_basic_block(&mut self, bb: &'ll BasicBlock) { |
| llvm::LLVMDeleteBasicBlock(bb); |
| } |
| |
| fn do_not_inline(&mut self, llret: &'ll Value) { |
| llvm::Attribute::NoInline.apply_callsite(llvm::AttributePlace::Function, llret); |
| } |
| } |
| |
| impl StaticBuilderMethods for Builder<'a, 'll, 'tcx> { |
| fn get_static(&mut self, def_id: DefId) -> &'ll Value { |
| // Forward to the `get_static` method of `CodegenCx` |
| self.cx().get_static(def_id) |
| } |
| } |
| |
| impl Builder<'a, 'll, 'tcx> { |
| pub fn llfn(&self) -> &'ll Value { |
| unsafe { |
| llvm::LLVMGetBasicBlockParent(self.llbb()) |
| } |
| } |
| |
| fn position_at_start(&mut self, llbb: &'ll BasicBlock) { |
| unsafe { |
| llvm::LLVMRustPositionBuilderAtStart(self.llbuilder, llbb); |
| } |
| } |
| |
| pub fn minnum(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value { |
| unsafe { llvm::LLVMRustBuildMinNum(self.llbuilder, lhs, rhs) } |
| } |
| |
| pub fn maxnum(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value { |
| unsafe { llvm::LLVMRustBuildMaxNum(self.llbuilder, lhs, rhs) } |
| } |
| |
| pub fn insert_element( |
| &mut self, vec: &'ll Value, |
| elt: &'ll Value, |
| idx: &'ll Value, |
| ) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildInsertElement(self.llbuilder, vec, elt, idx, UNNAMED) |
| } |
| } |
| |
| pub fn shuffle_vector( |
| &mut self, |
| v1: &'ll Value, |
| v2: &'ll Value, |
| mask: &'ll Value, |
| ) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildShuffleVector(self.llbuilder, v1, v2, mask, UNNAMED) |
| } |
| } |
| |
| pub fn vector_reduce_fadd(&mut self, acc: &'ll Value, src: &'ll Value) -> &'ll Value { |
| unsafe { llvm::LLVMRustBuildVectorReduceFAdd(self.llbuilder, acc, src) } |
| } |
| pub fn vector_reduce_fmul(&mut self, acc: &'ll Value, src: &'ll Value) -> &'ll Value { |
| unsafe { llvm::LLVMRustBuildVectorReduceFMul(self.llbuilder, acc, src) } |
| } |
| pub fn vector_reduce_fadd_fast(&mut self, acc: &'ll Value, src: &'ll Value) -> &'ll Value { |
| unsafe { |
| let instr = llvm::LLVMRustBuildVectorReduceFAdd(self.llbuilder, acc, src); |
| llvm::LLVMRustSetHasUnsafeAlgebra(instr); |
| instr |
| } |
| } |
| pub fn vector_reduce_fmul_fast(&mut self, acc: &'ll Value, src: &'ll Value) -> &'ll Value { |
| unsafe { |
| let instr = llvm::LLVMRustBuildVectorReduceFMul(self.llbuilder, acc, src); |
| llvm::LLVMRustSetHasUnsafeAlgebra(instr); |
| instr |
| } |
| } |
| pub fn vector_reduce_add(&mut self, src: &'ll Value) -> &'ll Value { |
| unsafe { llvm::LLVMRustBuildVectorReduceAdd(self.llbuilder, src) } |
| } |
| pub fn vector_reduce_mul(&mut self, src: &'ll Value) -> &'ll Value { |
| unsafe { llvm::LLVMRustBuildVectorReduceMul(self.llbuilder, src) } |
| } |
| pub fn vector_reduce_and(&mut self, src: &'ll Value) -> &'ll Value { |
| unsafe { llvm::LLVMRustBuildVectorReduceAnd(self.llbuilder, src) } |
| } |
| pub fn vector_reduce_or(&mut self, src: &'ll Value) -> &'ll Value { |
| unsafe { llvm::LLVMRustBuildVectorReduceOr(self.llbuilder, src) } |
| } |
| pub fn vector_reduce_xor(&mut self, src: &'ll Value) -> &'ll Value { |
| unsafe { llvm::LLVMRustBuildVectorReduceXor(self.llbuilder, src) } |
| } |
| pub fn vector_reduce_fmin(&mut self, src: &'ll Value) -> &'ll Value { |
| unsafe { llvm::LLVMRustBuildVectorReduceFMin(self.llbuilder, src, /*NoNaNs:*/ false) } |
| } |
| pub fn vector_reduce_fmax(&mut self, src: &'ll Value) -> &'ll Value { |
| unsafe { llvm::LLVMRustBuildVectorReduceFMax(self.llbuilder, src, /*NoNaNs:*/ false) } |
| } |
| pub fn vector_reduce_fmin_fast(&mut self, src: &'ll Value) -> &'ll Value { |
| unsafe { |
| let instr = llvm::LLVMRustBuildVectorReduceFMin(self.llbuilder, src, /*NoNaNs:*/ true); |
| llvm::LLVMRustSetHasUnsafeAlgebra(instr); |
| instr |
| } |
| } |
| pub fn vector_reduce_fmax_fast(&mut self, src: &'ll Value) -> &'ll Value { |
| unsafe { |
| let instr = llvm::LLVMRustBuildVectorReduceFMax(self.llbuilder, src, /*NoNaNs:*/ true); |
| llvm::LLVMRustSetHasUnsafeAlgebra(instr); |
| instr |
| } |
| } |
| pub fn vector_reduce_min(&mut self, src: &'ll Value, is_signed: bool) -> &'ll Value { |
| unsafe { llvm::LLVMRustBuildVectorReduceMin(self.llbuilder, src, is_signed) } |
| } |
| pub fn vector_reduce_max(&mut self, src: &'ll Value, is_signed: bool) -> &'ll Value { |
| unsafe { llvm::LLVMRustBuildVectorReduceMax(self.llbuilder, src, is_signed) } |
| } |
| |
| pub fn add_clause(&mut self, landing_pad: &'ll Value, clause: &'ll Value) { |
| unsafe { |
| llvm::LLVMAddClause(landing_pad, clause); |
| } |
| } |
| |
| pub fn catch_ret(&mut self, funclet: &Funclet<'ll>, unwind: &'ll BasicBlock) -> &'ll Value { |
| let ret = unsafe { |
| llvm::LLVMRustBuildCatchRet(self.llbuilder, funclet.cleanuppad(), unwind) |
| }; |
| ret.expect("LLVM does not have support for catchret") |
| } |
| |
| fn check_store(&mut self, val: &'ll Value, ptr: &'ll Value) -> &'ll Value { |
| let dest_ptr_ty = self.cx.val_ty(ptr); |
| let stored_ty = self.cx.val_ty(val); |
| let stored_ptr_ty = self.cx.type_ptr_to(stored_ty); |
| |
| assert_eq!(self.cx.type_kind(dest_ptr_ty), TypeKind::Pointer); |
| |
| if dest_ptr_ty == stored_ptr_ty { |
| ptr |
| } else { |
| debug!("type mismatch in store. \ |
| Expected {:?}, got {:?}; inserting bitcast", |
| dest_ptr_ty, stored_ptr_ty); |
| self.bitcast(ptr, stored_ptr_ty) |
| } |
| } |
| |
| fn check_call<'b>(&mut self, |
| typ: &str, |
| llfn: &'ll Value, |
| args: &'b [&'ll Value]) -> Cow<'b, [&'ll Value]> { |
| let mut fn_ty = self.cx.val_ty(llfn); |
| // Strip off pointers |
| while self.cx.type_kind(fn_ty) == TypeKind::Pointer { |
| fn_ty = self.cx.element_type(fn_ty); |
| } |
| |
| assert!(self.cx.type_kind(fn_ty) == TypeKind::Function, |
| "builder::{} not passed a function, but {:?}", typ, fn_ty); |
| |
| let param_tys = self.cx.func_params_types(fn_ty); |
| |
| let all_args_match = param_tys.iter() |
| .zip(args.iter().map(|&v| self.val_ty(v))) |
| .all(|(expected_ty, actual_ty)| *expected_ty == actual_ty); |
| |
| if all_args_match { |
| return Cow::Borrowed(args); |
| } |
| |
| let casted_args: Vec<_> = param_tys.into_iter() |
| .zip(args.iter()) |
| .enumerate() |
| .map(|(i, (expected_ty, &actual_val))| { |
| let actual_ty = self.val_ty(actual_val); |
| if expected_ty != actual_ty { |
| debug!("type mismatch in function call of {:?}. \ |
| Expected {:?} for param {}, got {:?}; injecting bitcast", |
| llfn, expected_ty, i, actual_ty); |
| self.bitcast(actual_val, expected_ty) |
| } else { |
| actual_val |
| } |
| }) |
| .collect(); |
| |
| Cow::Owned(casted_args) |
| } |
| |
| pub fn va_arg(&mut self, list: &'ll Value, ty: &'ll Type) -> &'ll Value { |
| unsafe { |
| llvm::LLVMBuildVAArg(self.llbuilder, list, ty, UNNAMED) |
| } |
| } |
| |
| fn call_lifetime_intrinsic(&mut self, intrinsic: &str, ptr: &'ll Value, size: Size) { |
| if self.cx.sess().opts.optimize == config::OptLevel::No { |
| return; |
| } |
| |
| let size = size.bytes(); |
| if size == 0 { |
| return; |
| } |
| |
| let lifetime_intrinsic = self.cx.get_intrinsic(intrinsic); |
| |
| let ptr = self.pointercast(ptr, self.cx.type_i8p()); |
| self.call(lifetime_intrinsic, &[self.cx.const_u64(size), ptr], None); |
| } |
| |
| fn phi(&mut self, ty: &'ll Type, vals: &[&'ll Value], bbs: &[&'ll BasicBlock]) -> &'ll Value { |
| assert_eq!(vals.len(), bbs.len()); |
| let phi = unsafe { |
| llvm::LLVMBuildPhi(self.llbuilder, ty, UNNAMED) |
| }; |
| unsafe { |
| llvm::LLVMAddIncoming(phi, vals.as_ptr(), |
| bbs.as_ptr(), |
| vals.len() as c_uint); |
| phi |
| } |
| } |
| |
| fn add_incoming_to_phi(&mut self, phi: &'ll Value, val: &'ll Value, bb: &'ll BasicBlock) { |
| unsafe { |
| llvm::LLVMAddIncoming(phi, &val, &bb, 1 as c_uint); |
| } |
| } |
| } |
