64 lines
3 KiB
LLVM
64 lines
3 KiB
LLVM
; RUN: opt %s --passes=inline -o - -S | FileCheck %s --implicit-check-not=dbg.value
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; RUN: opt %s --passes=inline -o - -S --try-experimental-debuginfo-iterators | FileCheck %s --implicit-check-not=dbg.value
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;; The inliner, specially, hoists all alloca instructions into the entry block
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;; of the calling function. Ensure that it doesn't accidentally transfer the
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;; dbg.value intrinsic from after the alloca to somewhere else. There should be
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;; one dbg.value in the resulting block after the call to ext, and before the
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;; call to init.
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;;
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;; This becomes significant in the context of non-instruction debug-info. When
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;; splicing segments of instructions around, it's typically the range from one
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;; "real" instruction to another, implicitly including all the dbg.values that
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;; come before the ending instruction. The inliner is a (unique!) location in
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;; LLVM that builds a range of only a single instruction kind (allocas) and thus
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;; doesn't transfer the dbg.value to the entry block. This needs Special
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;; Handling once we get rid of debug-intrinsics.
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; CHECK: declare void @llvm.dbg.value(metadata,
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; CHECK: define i32 @bar()
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; CHECK-NEXT: %1 = alloca [65 x i32], align 16
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; CHECK-NEXT: call void @ext()
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 0, metadata !10, metadata !DIExpression()), !dbg !12
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; CHECK-NEXT: call void @init(ptr %1)
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declare void @ext()
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declare void @init(ptr)
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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define internal i32 @foo() !dbg !4 {
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%1 = alloca [65 x i32], align 16
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call void @llvm.dbg.value(metadata i32 0, metadata !11, metadata !DIExpression()), !dbg !14
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call void @init(ptr %1)
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%2 = load i32, ptr %1, align 4
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ret i32 %2
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}
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define i32 @bar() !dbg !16 {
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call void @ext()
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%1 = call i32 @foo(), !dbg !17
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ret i32 %1
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!8, !9}
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!llvm.ident = !{!10}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "a.cc", directory: "/tmp")
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!2 = !{}
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!4 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fooi", scope: !1, file: !1, line: 3, type: !5, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!5 = !DISubroutineType(types: !6)
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!6 = !{null, !7}
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!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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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 = !{!"clang"}
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!11 = !DILocalVariable(name: "i", arg: 1, scope: !4, file: !1, line: 3, type: !7)
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!12 = !DIExpression()
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!14 = !DILocation(line: 4, column: 7, scope: !15)
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!15 = distinct !DILexicalBlock(scope: !4, file: !1, line: 4, column: 7)
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!16 = distinct !DISubprogram(name: "bar", linkageName: "bar", scope: !1, file: !1, line: 3, type: !5, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!17 = !DILocation(line: 4, column: 7, scope: !16)
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