| # Check that llvm can describe a call site parameter which resides in a spill slot. |
| # |
| # RUN: llc -emit-call-site-info -debug-entry-values -start-after=machineverifier -filetype=obj %s -o - | llvm-dwarfdump - | FileCheck %s |
| # |
| # Command: |
| # $ ~/src/builds/llvm-project-main-RA/bin/clang -g -Xclang -femit-debug-entry-values -O2 -c -o spill.o spill.cc -mllvm -stop-before=machineverifier -o spill.mir |
| # |
| # Source: |
| ## extern void callee(int); |
| ## |
| ## #define FORCE_SPILL() \ |
| ## asm volatile("" \ |
| ## : \ |
| ## : \ |
| ## : "rax", "rbx", "rcx", "rdx", "rsi", "rdi", "rbp", "r8", "r9", \ |
| ## "r10", "r11", "r12", "r13", "r14", "r15") |
| ## |
| ## __attribute__((disable_tail_calls)) void caller(int x) { |
| ## FORCE_SPILL(); |
| ## callee(x); |
| ## } |
| |
| # CHECK-LABEL: DW_TAG_call_site_parameter |
| # CHECK-NEXT: DW_AT_location (DW_OP_reg5 RDI) |
| # CHECK-NEXT: DW_AT_call_value (DW_OP_fbreg -44, DW_OP_deref_size 0x4) |
| |
| --- | |
| ; ModuleID = 'spill.cc' |
| source_filename = "spill.cc" |
| target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-apple-macosx10.14.0" |
| |
| ; Function Attrs: ssp uwtable |
| define void @_Z6calleri(i32 %x) local_unnamed_addr #0 !dbg !13 { |
| entry: |
| call void @llvm.dbg.value(metadata i32 %x, metadata !15, metadata !DIExpression()), !dbg !16 |
| call void asm sideeffect "", "~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"(), !dbg !17, !srcloc !18 |
| call void @_Z6calleei(i32 %x), !dbg !19 |
| ret void, !dbg !20 |
| } |
| |
| declare !dbg !4 void @_Z6calleei(i32) local_unnamed_addr |
| |
| ; Function Attrs: nounwind readnone speculatable willreturn |
| declare void @llvm.dbg.value(metadata, metadata, metadata) |
| |
| ; Function Attrs: nounwind |
| declare void @llvm.stackprotector(ptr, ptr) |
| |
| attributes #0 = { "disable-tail-calls"="true" "frame-pointer"="all" } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!8, !9, !10, !11} |
| !llvm.ident = !{!12} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 10.0.0 (git@github.com:llvm/llvm-project.git 132f768649d8f21d577ee220e5e084904874cb3d)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None) |
| !1 = !DIFile(filename: "spill.cc", directory: "/Users/vsk/tmp/param-analysis") |
| !2 = !{} |
| !3 = !{!4} |
| !4 = !DISubprogram(name: "callee", linkageName: "_Z6calleei", scope: !1, file: !1, line: 1, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2) |
| !5 = !DISubroutineType(types: !6) |
| !6 = !{null, !7} |
| !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !8 = !{i32 2, !"Dwarf Version", i32 4} |
| !9 = !{i32 2, !"Debug Info Version", i32 3} |
| !10 = !{i32 1, !"wchar_size", i32 4} |
| !11 = !{i32 7, !"PIC Level", i32 2} |
| !12 = !{!"clang version 10.0.0 (git@github.com:llvm/llvm-project.git 132f768649d8f21d577ee220e5e084904874cb3d)"} |
| !13 = distinct !DISubprogram(name: "caller", linkageName: "_Z6calleri", scope: !1, file: !1, line: 10, type: !5, scopeLine: 10, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !14) |
| !14 = !{!15} |
| !15 = !DILocalVariable(name: "x", arg: 1, scope: !13, file: !1, line: 10, type: !7) |
| !16 = !DILocation(line: 0, scope: !13) |
| !17 = !DILocation(line: 11, column: 3, scope: !13) |
| !18 = !{i32 -2147469811} |
| !19 = !DILocation(line: 12, column: 3, scope: !13) |
| !20 = !DILocation(line: 13, column: 1, scope: !13) |
| |
| ... |
| --- |
| name: _Z6calleri |
| alignment: 16 |
| exposesReturnsTwice: false |
| legalized: false |
| regBankSelected: false |
| selected: false |
| failedISel: false |
| tracksRegLiveness: true |
| hasWinCFI: false |
| registers: [] |
| liveins: |
| - { reg: '$edi', virtual-reg: '' } |
| frameInfo: |
| isFrameAddressTaken: false |
| isReturnAddressTaken: false |
| hasStackMap: false |
| hasPatchPoint: false |
| stackSize: 56 |
| offsetAdjustment: -56 |
| maxAlignment: 4 |
| adjustsStack: true |
| hasCalls: true |
| stackProtector: '' |
| maxCallFrameSize: 0 |
| cvBytesOfCalleeSavedRegisters: 40 |
| hasOpaqueSPAdjustment: false |
| hasVAStart: false |
| hasMustTailInVarArgFunc: false |
| localFrameSize: 0 |
| savePoint: '' |
| restorePoint: '' |
| fixedStack: |
| - { id: 0, type: spill-slot, offset: -56, size: 8, alignment: 8, stack-id: default, |
| callee-saved-register: '$rbx', callee-saved-restored: true, debug-info-variable: '', |
| debug-info-expression: '', debug-info-location: '' } |
| - { id: 1, type: spill-slot, offset: -48, size: 8, alignment: 16, stack-id: default, |
| callee-saved-register: '$r12', callee-saved-restored: true, debug-info-variable: '', |
| debug-info-expression: '', debug-info-location: '' } |
| - { id: 2, type: spill-slot, offset: -40, size: 8, alignment: 8, stack-id: default, |
| callee-saved-register: '$r13', callee-saved-restored: true, debug-info-variable: '', |
| debug-info-expression: '', debug-info-location: '' } |
| - { id: 3, type: spill-slot, offset: -32, size: 8, alignment: 16, stack-id: default, |
| callee-saved-register: '$r14', callee-saved-restored: true, debug-info-variable: '', |
| debug-info-expression: '', debug-info-location: '' } |
| - { id: 4, type: spill-slot, offset: -24, size: 8, alignment: 8, stack-id: default, |
| callee-saved-register: '$r15', callee-saved-restored: true, debug-info-variable: '', |
| debug-info-expression: '', debug-info-location: '' } |
| - { id: 5, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default, |
| callee-saved-register: '', callee-saved-restored: true, debug-info-variable: '', |
| debug-info-expression: '', debug-info-location: '' } |
| stack: |
| - { id: 0, name: '', type: spill-slot, offset: -60, size: 4, alignment: 4, |
| stack-id: default, callee-saved-register: '', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| callSites: |
| - { bb: 0, offset: 23, fwdArgRegs: |
| - { arg: 0, reg: '$edi' } } |
| constants: [] |
| machineFunctionInfo: {} |
| body: | |
| bb.0.entry: |
| liveins: $edi, $r15, $r14, $r13, $r12, $rbx |
| |
| DBG_VALUE $edi, $noreg, !15, !DIExpression(), debug-location !16 |
| frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp |
| CFI_INSTRUCTION def_cfa_offset 16 |
| CFI_INSTRUCTION offset $rbp, -16 |
| $rbp = frame-setup MOV64rr $rsp |
| CFI_INSTRUCTION def_cfa_register $rbp |
| frame-setup PUSH64r killed $r15, implicit-def $rsp, implicit $rsp |
| frame-setup PUSH64r killed $r14, implicit-def $rsp, implicit $rsp |
| frame-setup PUSH64r killed $r13, implicit-def $rsp, implicit $rsp |
| frame-setup PUSH64r killed $r12, implicit-def $rsp, implicit $rsp |
| frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp |
| frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp |
| CFI_INSTRUCTION offset $rbx, -56 |
| CFI_INSTRUCTION offset $r12, -48 |
| CFI_INSTRUCTION offset $r13, -40 |
| CFI_INSTRUCTION offset $r14, -32 |
| CFI_INSTRUCTION offset $r15, -24 |
| MOV32mr $rbp, 1, $noreg, -44, $noreg, $edi :: (store (s32) into %stack.0) |
| DBG_VALUE $rbp, 0, !15, !DIExpression(DW_OP_constu, 44, DW_OP_minus), debug-location !16 |
| INLINEASM &"", 1, 12, implicit-def dead early-clobber $rax, 12, implicit-def dead early-clobber $rbx, 12, implicit-def dead early-clobber $rcx, 12, implicit-def dead early-clobber $rdx, 12, implicit-def dead early-clobber $rsi, 12, implicit-def dead early-clobber $rdi, 12, implicit-def early-clobber $rbp, 12, implicit-def dead early-clobber $r8, 12, implicit-def dead early-clobber $r9, 12, implicit-def dead early-clobber $r10, 12, implicit-def dead early-clobber $r11, 12, implicit-def dead early-clobber $r12, 12, implicit-def dead early-clobber $r13, 12, implicit-def dead early-clobber $r14, 12, implicit-def dead early-clobber $r15, 12, implicit-def dead early-clobber $df, 12, implicit-def early-clobber $fpsw, 12, implicit-def dead early-clobber $eflags, !18, debug-location !17 |
| DBG_VALUE $edi, $noreg, !15, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !16 |
| $edi = MOV32rm $rbp, 1, $noreg, -44, $noreg :: (load (s32) from %stack.0) |
| DBG_VALUE $edi, $noreg, !15, !DIExpression(), debug-location !16 |
| CALL64pcrel32 @_Z6calleei, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, debug-location !19 |
| DBG_VALUE $edi, $noreg, !15, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !16 |
| $rsp = frame-destroy ADD64ri8 $rsp, 8, implicit-def dead $eflags, debug-location !20 |
| $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !20 |
| $r12 = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !20 |
| $r13 = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !20 |
| $r14 = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !20 |
| $r15 = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !20 |
| $rbp = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !20 |
| RET64 debug-location !20 |
| |
| ... |
