148 lines
6.8 KiB
Plaintext
148 lines
6.8 KiB
Plaintext
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# RUN: llc -run-pass=livedebugvalues %s -o - | FileCheck %s
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#
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# This test tests tracking variables value transferring from one register to another.
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# This example is altered additionally in order to test transferring from one float register
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# to another. The altered instructions are labeled below.
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#
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# CHECK: ![[ARG1:.*]] = !DILocalVariable(name: "arg1"
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# CHECK: DBG_VALUE $r4, $noreg, ![[ARG1]], !DIExpression(), debug-location
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# CHECK: $r5 = MOVr killed $r4, 14 /* CC::al */, $noreg, $noreg, debug-location
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# CHECK-NEXT: DBG_VALUE $r5, $noreg, ![[ARG1]], !DIExpression(), debug-location
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--- |
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; ModuleID = 'live-debug-values-reg-copy.ll'
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source_filename = "live-debug-values-reg-copy.c"
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
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target triple = "armv4t--"
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define dso_local arm_aapcscc i32 @foo(i32 %arg1) local_unnamed_addr !dbg !8 {
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entry:
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call void @llvm.dbg.value(metadata i32 %arg1, metadata !13, metadata !DIExpression()), !dbg !16
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%cmp = icmp sgt i32 %arg1, 10, !dbg !16
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br i1 %cmp, label %if.end, label %if.else, !dbg !16
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if.else: ; preds = %entry
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%add5 = add nsw i32 %arg1, 10, !dbg !16
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call void @llvm.dbg.value(metadata i32 %add5, metadata !13, metadata !DIExpression()), !dbg !16
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%call6 = tail call arm_aapcscc i32 @externFunc2(i32 %add5), !dbg !16
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%call8 = tail call arm_aapcscc i32 @externFunc(i32 %add5), !dbg !16
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ret i32 %call6, !dbg !16
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if.end: ; preds = %entry
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%call = tail call arm_aapcscc i32 @externFunc(i32 %arg1), !dbg !16
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ret i32 1, !dbg !16
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}
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declare dso_local arm_aapcscc i32 @externFunc(i32) local_unnamed_addr
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declare dso_local arm_aapcscc i32 @externFunc2(i32) local_unnamed_addr
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.value(metadata, metadata, metadata) #0
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; Function Attrs: nounwind
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declare void @llvm.stackprotector(i8*, i8**) #1
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attributes #0 = { nounwind readnone speculatable }
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attributes #1 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5, !6}
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!llvm.ident = !{!7}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "live-debug-values-reg-copy.c", directory: "/")
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!2 = !{}
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!3 = !{i32 2, !"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 = !{i32 1, !"min_enum_size", i32 4}
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!7 = !{!"clang version 7.0.0"}
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!8 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 4, type: !9, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !12)
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!9 = !DISubroutineType(types: !10)
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!10 = !{!11, !11}
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!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!12 = !{!13}
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!13 = !DILocalVariable(name: "arg1", arg: 1, scope: !8, file: !1, line: 4, type: !11)
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!16 = !DILocation(line: 4, column: 13, scope: !8)
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...
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---
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name: foo
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alignment: 4
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exposesReturnsTwice: false
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legalized: false
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regBankSelected: false
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selected: false
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tracksRegLiveness: false
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registers:
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liveins:
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- { reg: '$r0', virtual-reg: '' }
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frameInfo:
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isFrameAddressTaken: false
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isReturnAddressTaken: false
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hasStackMap: false
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hasPatchPoint: false
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stackSize: 16
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offsetAdjustment: 0
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maxAlignment: 4
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adjustsStack: true
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hasCalls: true
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stackProtector: ''
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maxCallFrameSize: 0
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hasOpaqueSPAdjustment: false
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hasVAStart: false
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hasMustTailInVarArgFunc: false
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savePoint: ''
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restorePoint: ''
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fixedStack:
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stack:
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- { id: 0, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4,
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stack-id: default, callee-saved-register: '$lr', callee-saved-restored: true,
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debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
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- { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,
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stack-id: default, callee-saved-register: '$r11', callee-saved-restored: true,
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debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
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- { id: 2, name: '', type: spill-slot, offset: -12, size: 4, alignment: 4,
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stack-id: default, callee-saved-register: '$r5', callee-saved-restored: true,
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debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
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- { id: 3, name: '', type: spill-slot, offset: -16, size: 4, alignment: 4,
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stack-id: default, callee-saved-register: '$r4', callee-saved-restored: true,
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debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
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constants:
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body: |
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bb.0.entry:
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successors: %bb.1(0x40000000), %bb.2(0x40000000)
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$sp = frame-setup STMDB_UPD $sp, 14, $noreg, killed $r4, killed $r5, killed $r11, killed $lr
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frame-setup CFI_INSTRUCTION def_cfa_offset 16
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frame-setup CFI_INSTRUCTION offset $lr, -4
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frame-setup CFI_INSTRUCTION offset $r11, -8
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frame-setup CFI_INSTRUCTION offset $r5, -12
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frame-setup CFI_INSTRUCTION offset $r4, -16
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DBG_VALUE $r0, $noreg, !13, !DIExpression(), debug-location !16
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DBG_VALUE $r0, $noreg, !13, !DIExpression(), debug-location !16
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CMPri renamable $r0, 10, 14, $noreg, implicit-def $cpsr, debug-location !16
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Bcc %bb.2, 13, killed $cpsr, debug-location !16
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bb.1.if.end:
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BL @externFunc, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $r0, implicit-def $sp, implicit-def dead $r0, debug-location !16
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$r0 = MOVi 1, 14, $noreg, $noreg, debug-location !16
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$sp = LDMIA_UPD $sp, 14, $noreg, def $r4, def $r5, def $r11, def $lr, debug-location !16
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BX_RET 14, $noreg, implicit killed $r0, debug-location !16
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bb.2.if.else:
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renamable $r4 = ADDri killed renamable $r0, 10, 14, $noreg, $noreg, debug-location !16
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DBG_VALUE $r4, $noreg, !13, !DIExpression(), debug-location !16
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$r0 = MOVr $r4, 14, $noreg, $noreg, debug-location !16
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BL @externFunc2, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $r0, implicit-def $sp, implicit-def $r0, debug-location !16
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$r5 = MOVr killed $r0, 14, $noreg, $noreg, debug-location !16
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$r0 = MOVr $r4, 14, $noreg, $noreg, debug-location !16
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BL @externFunc, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $r0, implicit-def $sp, implicit-def dead $r0, debug-location !16
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$r0 = MOVr killed $r5, 14, $noreg, $noreg, debug-location !16
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; Instruction below is added in order to test moving variable's value from one register to another.
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$r5 = MOVr killed $r4, 14, $noreg, $noreg, debug-location !16
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$sp = LDMIA_UPD $sp, 14, $noreg, def $r4, def $r5, def $r11, def $lr, debug-location !16
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BX_RET 14, $noreg, implicit killed $r0, debug-location !16
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...
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