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123 lines
4.0 KiB
123 lines
4.0 KiB
4 months ago
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# RUN: llc %s -o - -run-pass=livedebugvalues -mtriple=x86_64-unknown-unknown | FileCheck %s
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#
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# In this lightly modified test case, the transfer in the entry block from
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# geti32's return value in $eax to the non-volatile $ebx should be recognized,
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# and propagated throughout the whole function.
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#
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# CHECK-LABEL: bb.0.entry
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# CHECK: DBG_VALUE $eax
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# CHECK: DBG_VALUE $ebx
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# CHECK-LABEL: bb.1.loop2
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# CHECK: DBG_VALUE $ebx
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# CHECK-LABEL: bb.2.loop
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# CHECK: DBG_VALUE $ebx
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# CHECK-LABEL: bb.3.exit
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# CHECK: DBG_VALUE $ebx
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--- |
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; ModuleID = 'asdf'
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source_filename = "asdf.ll"
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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-unknown"
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@glob = global i32 0
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declare i1 @booler()
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declare i32 @geti32()
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declare void @escape(i32)
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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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define i32 @foo() !dbg !4 {
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entry:
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%bar = call i32 @geti32(), !dbg !10
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call void @llvm.dbg.value(metadata i32 %bar, metadata !9, metadata !DIExpression()), !dbg !10
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br label %loop
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loop: ; preds = %loop2, %entry
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call void @escape(i32 %bar)
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%retval = call i1 @booler(), !dbg !10
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br i1 %retval, label %loop2, label %exit
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loop2: ; preds = %loop
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store i32 %bar, i32* @glob
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br label %loop
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exit: ; preds = %loop
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ret i32 %bar
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}
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; Function Attrs: nounwind
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declare void @llvm.stackprotector(i8*, i8**)
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!llvm.module.flags = !{!0, !1}
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!llvm.dbg.cu = !{!2}
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!0 = !{i32 2, !"Debug Info Version", i32 3}
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!1 = !{i32 2, !"Dwarf Version", i32 4}
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!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "beards", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
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!3 = !DIFile(filename: "bees.cpp", directory: ".")
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!4 = distinct !DISubprogram(name: "nope", scope: !3, file: !3, line: 1, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !8)
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!5 = !DISubroutineType(types: !6)
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!6 = !{!7}
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!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!8 = !{!9}
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!9 = !DILocalVariable(name: "toast", scope: !4, file: !3, line: 1, type: !7)
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!10 = !DILocation(line: 1, scope: !4)
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...
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---
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name: foo
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tracksRegLiveness: true
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frameInfo:
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stackSize: 8
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offsetAdjustment: -8
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adjustsStack: true
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hasCalls: true
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cvBytesOfCalleeSavedRegisters: 8
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fixedStack:
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- { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default,
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callee-saved-register: '$rbx', callee-saved-restored: true, debug-info-variable: '',
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debug-info-expression: '', debug-info-location: '' }
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stack: []
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body: |
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bb.0.entry:
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successors: %bb.1(0x80000000)
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liveins: $rbx
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frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp, debug-location !10
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CFI_INSTRUCTION def_cfa_offset 16
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CFI_INSTRUCTION offset $rbx, -16
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CALL64pcrel32 @geti32, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !10
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DBG_VALUE $eax, $noreg, !9, !DIExpression(), debug-location !10
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$ebx = MOV32rr killed $eax, debug-location !10
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JMP_1 %bb.1
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bb.1.loop2:
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successors: %bb.2
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liveins: $ebx
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MOV32mr $rip, 1, $noreg, @glob, $noreg, renamable $ebx :: (store 4 into @glob)
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bb.2.loop:
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successors: %bb.1, %bb.3
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liveins: $ebx
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$edi = MOV32rr $ebx
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CALL64pcrel32 @escape, csr_64, implicit $rsp, implicit $ssp, implicit killed $edi, implicit-def $rsp, implicit-def $ssp
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CALL64pcrel32 @booler, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $al, debug-location !10
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TEST8ri killed renamable $al, 1, implicit-def $eflags
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JCC_1 %bb.1, 5, implicit $eflags
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bb.3.exit:
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liveins: $ebx
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$eax = MOV32rr killed $ebx
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$rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp
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CFI_INSTRUCTION def_cfa_offset 8
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RETQ $eax
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...
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