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90 lines
3.1 KiB
90 lines
3.1 KiB
4 months ago
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# RUN: llc -mtriple=x86_64-unknown-unknown -run-pass=machine-sink -o - %s | FileCheck %s
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# Based on machinesink.mir. Verify that the sub-register index in the DBG_VALUE
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# instruction is cleared when marking the debug value undef.
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--- |
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@x = common local_unnamed_addr global i32 0, align 4
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define void @test(i32* nocapture readonly %p) local_unnamed_addr !dbg !14 {
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; Stripped
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entry:
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br label %block1
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block1:
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br label %exit
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exit:
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ret void
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}
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!llvm.dbg.cu = !{!1}
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!llvm.module.flags = !{!5, !6}
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!llvm.ident = !{!7}
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!1 = distinct !DICompileUnit(language: DW_LANG_C99, file: !2, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !3, globals: !3)
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!2 = !DIFile(filename: "t.c", directory: "")
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!3 = !{}
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!4 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!5 = !{i32 2, !"Dwarf Version", i32 4}
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!6 = !{i32 2, !"Debug Info Version", i32 3}
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!7 = !{!"clang version 4.0.0 "}
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!8 = !DISubroutineType(types: !9)
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!9 = !{null, !10}
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!10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64)
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!11 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !12)
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!12 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
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!13 = !DIExpression()
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!14 = distinct !DISubprogram(name: "test", scope: !2, file: !2, line: 2, type: !8, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !1, retainedNodes: !15)
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!15 = !{!16}
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!16 = !DILocalVariable(name: "var", scope: !14, file: !2, line: 2, type: !12)
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!17 = !DILocation(line: 1, column: 1, scope: !14)
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; CHECK: [[VAR:![0-9]+]] = !DILocalVariable(name: "var",
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...
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---
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name: test
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tracksRegLiveness: true
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liveins:
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- { reg: '$rdi', virtual-reg: '%2' }
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- { reg: '$rsi', virtual-reg: '%2' }
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body: |
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bb.0.entry:
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successors: %bb.1.block1, %bb.2.exit
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liveins: $rdi, $esi
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; This block should _not_ have the first DBG_VALUE sunk out from it, as it
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; would pass a later DBG_VALUE of the same variable location. An undef
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; DBG_VALUE should be left behind though. Verify that the sub-register
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; index in the DBG_VALUE is cleared.
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; CHECK-LABEL: bb.0.entry:
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; CHECK: [[TEST2VREG:%[0-9]+]]:gr64 = COPY $rdi
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; CHECK-NEXT: CMP32ri $esi, 0
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; CHECK-NEXT: DBG_VALUE $noreg, $noreg, [[VAR]]
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; CHECK-NEXT: CMP32ri $esi, 0
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; CHECK-NEXT: DBG_VALUE 0, $noreg, [[VAR]]
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; CHECK-NEXT: JCC_1 %bb.1, 4
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; CHECK-NEXT: JMP_1
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%2:gr64 = COPY $rdi
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%5:gr64 = ADD64ri8 %2, 1, implicit-def dead $eflags
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CMP32ri $esi, 0, implicit-def $eflags
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DBG_VALUE %5.sub_32bit, $noreg, !16, !13, debug-location !17
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CMP32ri $esi, 0, implicit-def $eflags
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DBG_VALUE 0, $noreg, !16, !13, debug-location !17
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JCC_1 %bb.1.block1, 4, implicit $eflags
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JMP_1 %bb.2.exit
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bb.1.block1:
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successors: %bb.2.exit
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%1:gr64 = ADD64ri8 %5, 4, implicit-def dead $eflags
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JMP_1 %bb.2.exit
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bb.2.exit:
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$rax = MOV64rr %2
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RET 0
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...
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