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7d6813a6c8
This change simplifies code that has to deal with DIGlobalVariableExpression and mirrors how we treat DIExpressions in debug info intrinsics. Before this change there were two ways of representing empty expressions on globals, a nullptr and an empty !DIExpression(). If someone needs to upgrade out-of-tree testcases: perl -pi -e 's/(!DIGlobalVariableExpression\(var: ![0-9]*)\)/\1, expr: !DIExpression())/g' <MYTEST.ll> will catch 95%. llvm-svn: 312144
80 lines
3.7 KiB
LLVM
80 lines
3.7 KiB
LLVM
; RUN: llc -O2 < %s | FileCheck %s
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; RUN: llc -O2 -regalloc=basic < %s | FileCheck %s
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source_filename = "test/CodeGen/X86/2010-05-26-DotDebugLoc.ll"
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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target triple = "x86_64-apple-darwin10"
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%struct.a = type { i32, %struct.a* }
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@llvm.used = appending global [1 x i8*] [i8* bitcast (i8* (%struct.a*)* @bar to i8*)], section "llvm.metadata"
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; Function Attrs: noinline nounwind optsize ssp
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define i8* @bar(%struct.a* %myvar) #0 !dbg !8 {
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entry:
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tail call void @llvm.dbg.value(metadata %struct.a* %myvar, i64 0, metadata !18, metadata !19), !dbg !20
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%0 = getelementptr inbounds %struct.a, %struct.a* %myvar, i64 0, i32 0, !dbg !21
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%1 = load i32, i32* %0, align 8, !dbg !21
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tail call void @foo(i32 %1) #0, !dbg !21
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%2 = bitcast %struct.a* %myvar to i8*, !dbg !23
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ret i8* %2, !dbg !23
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}
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; Function Attrs: noinline nounwind optsize ssp
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declare void @foo(i32) #0
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
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attributes #0 = { noinline nounwind optsize ssp }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!7}
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!0 = distinct !DICompileUnit(language: DW_LANG_C89, file: !1, producer: "4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2, globals: !3, imports: !2)
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!1 = !DIFile(filename: "foo.c", directory: "/tmp/")
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!2 = !{}
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!3 = !{!4}
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!4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression())
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!5 = !DIGlobalVariable(name: "ret", scope: !1, file: !1, line: 7, type: !6, isLocal: false, isDefinition: true)
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!6 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!7 = !{i32 1, !"Debug Info Version", i32 3}
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!8 = distinct !DISubprogram(name: "bar", linkageName: "bar", scope: !1, file: !1, line: 17, type: !9, isLocal: false, isDefinition: true, scopeLine: 17, virtualIndex: 6, isOptimized: true, unit: !0, variables: !17)
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!9 = !DISubroutineType(types: !10)
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!10 = !{!11, !12}
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!11 = !DIDerivedType(tag: DW_TAG_pointer_type, scope: !1, file: !1, baseType: null, size: 64, align: 64)
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!12 = !DIDerivedType(tag: DW_TAG_pointer_type, scope: !1, file: !1, baseType: !13, size: 64, align: 64)
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!13 = !DICompositeType(tag: DW_TAG_structure_type, name: "a", scope: !1, file: !1, line: 2, size: 128, align: 64, elements: !14)
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!14 = !{!15, !16}
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!15 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !13, file: !1, line: 3, baseType: !6, size: 32, align: 32)
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!16 = !DIDerivedType(tag: DW_TAG_member, name: "d", scope: !13, file: !1, line: 4, baseType: !12, size: 64, align: 64, offset: 64)
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!17 = !{!18}
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!18 = !DILocalVariable(name: "myvar", arg: 1, scope: !8, file: !1, line: 17, type: !12)
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!19 = !DIExpression()
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!20 = !DILocation(line: 0, scope: !8)
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!21 = !DILocation(line: 18, scope: !22)
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!22 = distinct !DILexicalBlock(scope: !8, file: !1, line: 17)
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!23 = !DILocation(line: 19, scope: !22)
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; The variable bar:myvar changes registers after the first movq.
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; It is cobbered by popq %rbx
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; CHECK: movq
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; CHECK-NEXT: [[LABEL:Ltmp[0-9]*]]
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; CHECK: .loc 1 19 0
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; CHECK: popq
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; CHECK-NEXT: [[CLOBBER:Ltmp[0-9]*]]
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; CHECK: Ldebug_loc0:
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; CHECK-NEXT: [[SET1:.*]] = Lfunc_begin0-Lfunc_begin0
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; CHECK-NEXT: .quad [[SET1]]
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; CHECK-NEXT: [[SET2:.*]] = [[LABEL]]-Lfunc_begin0
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; CHECK-NEXT: .quad [[SET2]]
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; CHECK-NEXT: .short 1 ## Loc expr size
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; CHECK-NEXT: .byte 85
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; CHECK-NEXT: [[SET3:.*]] = [[LABEL]]-Lfunc_begin0
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; CHECK-NEXT: .quad [[SET3]]
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; CHECK-NEXT: [[SET4:.*]] = [[CLOBBER]]-Lfunc_begin0
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; CHECK-NEXT: .quad [[SET4]]
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; CHECK-NEXT: .short 1 ## Loc expr size
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; CHECK-NEXT: .byte 83
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