# RUN: llc -mtriple=x86_64-- -run-pass livedebugvalues -o - %s | FileCheck %s --implicit-check-not=DBG_VALUE_LIST | |
# | |
# Test that even after a move, clobbering a register terminates a DBG_VALUE_LIST. | |
# Check the same for DBG_VALUE $noreg. | |
# | |
# CHECK: ![[VAR:[0-9]+]] = !DILocalVariable(name: "c" | |
# | |
# CHECK-LABEL: bb.0.entry: | |
# CHECK: DBG_VALUE_LIST ![[VAR]], !DIExpression(DW_OP_LLVM_arg, 0, | |
# CHECK-SAME: DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi | |
# CHECK: $rbx = COPY killed $rdi | |
# CHECK-NEXT: DBG_VALUE_LIST ![[VAR]], !DIExpression(DW_OP_LLVM_arg, 0, | |
# CHECK-SAME: DW_OP_LLVM_arg, 1, DW_OP_plus), $rbx, $rsi | |
# CHECK-LABEL: bb.1: | |
# CHECK: DBG_VALUE_LIST ![[VAR]], !DIExpression(DW_OP_LLVM_arg, 0, | |
# CHECK-SAME: DW_OP_LLVM_arg, 1, DW_OP_plus), $rbx, $rsi | |
# CHECK: $rsi = MOV64ri 0 | |
# CHECK-LABEL: bb.2: | |
# no live-in! | |
# CHECK: $rsi = MOV64ri 0 | |
# CHECK-NEXT: DBG_VALUE_LIST ![[VAR]], !DIExpression(DW_OP_LLVM_arg, 0, | |
# CHECK-SAME: DW_OP_LLVM_arg, 1, DW_OP_plus), $rbx, $rsi | |
# CHECK-LABEL: bb.3: | |
# CHECK: DBG_VALUE_LIST ![[VAR]], !DIExpression(DW_OP_LLVM_arg, 0, | |
# CHECK-SAME: DW_OP_LLVM_arg, 1, DW_OP_plus), $rbx, $rsi | |
# live-in to bb.3, then explicitly undef'd, should be no further locations | |
# propagated. | |
# CHECK-LABEL: bb.4: | |
--- | | |
; ModuleID = 'test.cpp' | |
source_filename = "test.cpp" | |
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" | |
target triple = "x86_64-unknown-linux-gnu" | |
; Function Attrs: norecurse nounwind readnone uwtable | |
define dso_local i32 @_Z3fooii(i32 %a, i32 %b) local_unnamed_addr !dbg !7 { | |
entry: | |
ret i32 0, !dbg !17 | |
} | |
; Function Attrs: nounwind readnone speculatable willreturn | |
declare void @llvm.dbg.value(metadata, metadata, metadata) | |
!llvm.dbg.cu = !{!0} | |
!llvm.module.flags = !{!3, !4, !5} | |
!llvm.ident = !{!6} | |
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None) | |
!1 = !DIFile(filename: "test.cpp", directory: "/") | |
!2 = !{} | |
!3 = !{i32 7, !"Dwarf Version", i32 4} | |
!4 = !{i32 2, !"Debug Info Version", i32 3} | |
!5 = !{i32 1, !"wchar_size", i32 4} | |
!6 = !{!"clang version 11.0.0"} | |
!7 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fooii", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11) | |
!8 = !DISubroutineType(types: !9) | |
!9 = !{!10, !10, !10} | |
!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) | |
!11 = !{!12, !13, !14} | |
!12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 2, type: !10) | |
!13 = !DILocalVariable(name: "b", arg: 2, scope: !7, file: !1, line: 2, type: !10) | |
!14 = !DILocalVariable(name: "c", scope: !7, file: !1, line: 3, type: !10) | |
!15 = !DILocation(line: 0, scope: !7) | |
!16 = !DILocation(line: 4, column: 12, scope: !7) | |
!17 = !DILocation(line: 4, column: 3, scope: !7) | |
... | |
--- | |
name: _Z3fooii | |
fixedStack: | |
- { id: 0, type: spill-slot, offset: -32, size: 8, alignment: 16, stack-id: default, | |
callee-saved-register: '$rbx', callee-saved-restored: true } | |
- { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default, | |
callee-saved-register: '$rbp', callee-saved-restored: true } | |
body: | | |
bb.0.entry: | |
liveins: $rdi, $rsi | |
DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, debug-location !15 | |
$rbx = COPY killed $rdi | |
$rdi = MOV64ri 0 | |
JMP_1 %bb.1 | |
bb.1: | |
liveins: $rbx, $rsi | |
$rsi = MOV64ri 0 | |
JMP_1 %bb.2 | |
bb.2: | |
liveins: $rbx, $rsi | |
$rsi = MOV64ri 0 | |
DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rbx, $rsi, debug-location !15 | |
JMP_1 %bb.3 | |
bb.3: | |
liveins: $rbx, $rsi | |
DBG_VALUE $noreg, $noreg, !14, !DIExpression(), debug-location !15 | |
JMP_1 %bb.4 | |
bb.4: | |
liveins: $rbx, $rsi | |
RETQ $rbx, debug-location !17 | |
... | |