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| # RUN: llc -O1 -filetype=asm -mtriple x86_64-unknown-linux-gnu -mcpu=x86-64 -o - %s -start-before=simple-register-coalescing -stop-after=simple-register-coalescing | FileCheck %s
--- |
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define i32 @main() local_unnamed_addr !dbg !14 {
entry:
%shl = shl i32 undef, undef, !dbg !19
tail call void @llvm.dbg.value(metadata i32 %shl, metadata !18, metadata !DIExpression()), !dbg !20
ret i32 %shl, !dbg !21
}
declare void @llvm.dbg.value(metadata, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!12, !13}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !2)
!1 = !DIFile(filename: "bar.c", directory: "")
!2 = !{}
!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!12 = !{i32 2, !"Debug Info Version", i32 3}
!13 = !{i32 1, !"wchar_size", i32 4}
!14 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 12, type: !15, isLocal: false, isDefinition: true, scopeLine: 12, isOptimized: true, unit: !0, retainedNodes: !17)
!15 = !DISubroutineType(types: !16)
!16 = !{!7}
!17 = !{!18}
!18 = !DILocalVariable(name: "bazinga", scope: !14, file: !1, line: 13, type: !7)
!19 = !DILocation(line: 14, column: 11, scope: !14)
!20 = !DILocation(line: 13, column: 7, scope: !14)
!21 = !DILocation(line: 16, column: 3, scope: !14)
...
---
name: main
alignment: 16
registers:
- { id: 0, class: gr32, preferred-register: '' }
body: |
bb.0.entry:
%0 = MOV32r0 implicit-def dead $eflags, debug-location !19
DBG_VALUE %0, _, !18, !DIExpression(), debug-location !20
$eax = COPY killed %0, debug-location !21
RET 0, killed $eax, debug-location !21
...
# CHECK: $eax = MOV32r0
# CHECK-NEXT: DBG_VALUE $eax
|