107 lines
4.3 KiB
Text
107 lines
4.3 KiB
Text
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# RUN: llc -mtriple=x86_64-- -run-pass livedebugvalues -o - %s -experimental-debug-variable-locations=false | FileCheck %s --implicit-check-not=DBG_VALUE_LIST
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#
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# Test that even after a move, clobbering a register terminates a DBG_VALUE_LIST.
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# Check the same for DBG_VALUE $noreg.
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#
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# CHECK: ![[VAR:[0-9]+]] = !DILocalVariable(name: "c"
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#
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# CHECK-LABEL: bb.0.entry:
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# CHECK: DBG_VALUE_LIST ![[VAR]], !DIExpression(DW_OP_LLVM_arg, 0,
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# CHECK-SAME: DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi
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# CHECK: $rbx = COPY killed $rdi
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# CHECK-NEXT: DBG_VALUE_LIST ![[VAR]], !DIExpression(DW_OP_LLVM_arg, 0,
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# CHECK-SAME: DW_OP_LLVM_arg, 1, DW_OP_plus), $rbx, $rsi
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# CHECK-LABEL: bb.1:
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# CHECK: DBG_VALUE_LIST ![[VAR]], !DIExpression(DW_OP_LLVM_arg, 0,
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# CHECK-SAME: DW_OP_LLVM_arg, 1, DW_OP_plus), $rbx, $rsi
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# CHECK: $rsi = MOV64ri 0
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# CHECK-LABEL: bb.2:
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# no live-in!
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# CHECK: $rsi = MOV64ri 0
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# CHECK-NEXT: DBG_VALUE_LIST ![[VAR]], !DIExpression(DW_OP_LLVM_arg, 0,
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# CHECK-SAME: DW_OP_LLVM_arg, 1, DW_OP_plus), $rbx, $rsi
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# CHECK-LABEL: bb.3:
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# CHECK: DBG_VALUE_LIST ![[VAR]], !DIExpression(DW_OP_LLVM_arg, 0,
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# CHECK-SAME: DW_OP_LLVM_arg, 1, DW_OP_plus), $rbx, $rsi
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# live-in to bb.3, then explicitly undef'd, should be no further locations
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# propagated.
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# CHECK-LABEL: bb.4:
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--- |
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; ModuleID = 'test.cpp'
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source_filename = "test.cpp"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Function Attrs: norecurse nounwind readnone uwtable
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define dso_local i32 @_Z3fooii(i32 %a, i32 %b) local_unnamed_addr !dbg !7 {
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entry:
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ret i32 0, !dbg !17
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}
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!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)
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!1 = !DIFile(filename: "test.cpp", directory: "/")
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!2 = !{}
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!3 = !{i32 7, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"clang version 11.0.0"}
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!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)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10, !10, !10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !{!12, !13, !14}
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!12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 2, type: !10)
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!13 = !DILocalVariable(name: "b", arg: 2, scope: !7, file: !1, line: 2, type: !10)
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!14 = !DILocalVariable(name: "c", scope: !7, file: !1, line: 3, type: !10)
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!15 = !DILocation(line: 0, scope: !7)
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!16 = !DILocation(line: 4, column: 12, scope: !7)
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!17 = !DILocation(line: 4, column: 3, scope: !7)
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...
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---
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name: _Z3fooii
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fixedStack:
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- { id: 0, type: spill-slot, offset: -32, size: 8, alignment: 16, stack-id: default,
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callee-saved-register: '$rbx', callee-saved-restored: true }
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- { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default,
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callee-saved-register: '$rbp', callee-saved-restored: true }
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body: |
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bb.0.entry:
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liveins: $rdi, $rsi
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DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, debug-location !15
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$rbx = COPY killed $rdi
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$rdi = MOV64ri 0
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JMP_1 %bb.1
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bb.1:
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liveins: $rbx, $rsi
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$rsi = MOV64ri 0
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JMP_1 %bb.2
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bb.2:
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liveins: $rbx, $rsi
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$rsi = MOV64ri 0
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DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rbx, $rsi, debug-location !15
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JMP_1 %bb.3
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bb.3:
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liveins: $rbx, $rsi
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DBG_VALUE $noreg, $noreg, !14, !DIExpression(), debug-location !15
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JMP_1 %bb.4
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bb.4:
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liveins: $rbx, $rsi
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RET64 $rbx, debug-location !17
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...
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