2e39b57837
This reapplication changes debug intrinsic declaration removal to only take place when printing final IR, so that the processing format of the Module does not affect the output. This reverts commit d128448efdd4e2bf3c9bc9a5b43ae642aa78026f.
66 lines
3.0 KiB
LLVM
66 lines
3.0 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: 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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; CHECK: declare void @llvm.dbg.value(metadata,
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declare void @ext()
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declare void @init(ptr)
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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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declare void @llvm.dbg.value(metadata, metadata, metadata)
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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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