derek.holloway
7502bf64a4
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58 lines
2.2 KiB
LLVM
58 lines
2.2 KiB
LLVM
; RUN: opt -S -strip-debug -aa-pipeline=globals-aa,basic-aa -passes='require<globals-aa>,instcombine' < %s | FileCheck %s
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; RUN: opt -S -aa-pipeline=globals-aa,basic-aa -passes='require<globals-aa>,instcombine' < %s | FileCheck %s
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; Having debug info around shouldn't affect what globals-aa and instcombine do.
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@g = global i8 0
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define void @bar(i8 %p) {
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call void @llvm.dbg.value(metadata i64 0, metadata !14, metadata !DIExpression()), !dbg !15
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ret void
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}
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declare void @gaz(i8 %p)
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define void @foo() {
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store i8 42, ptr @g, align 1
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call void @bar(i8 1)
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%_tmp = load i8, ptr @g, align 1
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call void @gaz(i8 %_tmp)
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ret void
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}
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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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attributes #0 = { nounwind readnone speculatable }
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!llvm.dbg.cu = !{!5}
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!llvm.module.flags = !{!8, !9}
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!llvm.ident = !{!10}
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!0 = !DIFile(filename: "foo.c", directory: "/tmp")
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!1 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint64_t", file: !2, line: 77, baseType: !3)
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!2 = !DIFile(filename: "foo.h", directory: "/tmp")
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!3 = !DIDerivedType(tag: DW_TAG_typedef, name: "__u64_t", file: !0, baseType: !4)
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!4 = !DIBasicType(name: "unsigned long long", size: 64, encoding: DW_ATE_unsigned)
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!5 = distinct !DICompileUnit(language: DW_LANG_C, file: !0, producer: "My Compiler", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !6, retainedTypes: !6, globals: !7)
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!6 = !{}
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!7 = !{}
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!8 = !{i32 2, !"Dwarf Version", i32 4}
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!9 = !{i32 2, !"Debug Info Version", i32 3}
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!10 = !{!"My Compiler"}
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!11 = distinct !DISubprogram(name: "func_5", scope: !0, file: !0, line: 117, type: !12, isLocal: true, isDefinition: true, scopeLine: 118, isOptimized: false, unit: !5, retainedNodes: !6)
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!12 = !DISubroutineType(types: !13)
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!13 = !{}
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!14 = !DILocalVariable(name: "p_6", arg: 1, scope: !11, line: 117, type: !1)
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!15 = !DILocation(line: 117, column: 34, scope: !11)
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; instcombine should realize that the load will read 42 from g and pass 42 to
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; gaz regardless of the dbg.value in bar.
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; CHECK: define void @foo() {
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; CHECK-NEXT: store i8 42, ptr @g, align 1
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; CHECK-NEXT: call void @bar(i8 1)
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; CHECK-NEXT: call void @gaz(i8 42)
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; CHECK-NEXT: ret void
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