c672ba7dde
With intrinsics representing debug-info, we just clone all the intrinsics when inlining a function and don't think about it any further. With non-instruction debug-info however we need to be a bit more careful and manually move the debug-info from one place to another. For the most part, this means keeping a "cursor" during block cloning of where we last copied debug-info from, and performing debug-info copying whenever we successfully clone another instruction. There are several utilities in LLVM for doing this, all of which now need to manually call cloneDebugInfo. The testing story for this is not well covered as we could rely on normal instruction-cloning mechanisms to do all the hard stuff. Thus, I've added a few tests to explicitly test dbg.value behaviours, ahead of them becoming not-instructions.
75 lines
3.1 KiB
LLVM
75 lines
3.1 KiB
LLVM
; RUN: opt < %s -S -passes=inline | FileCheck %s
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; RUN: opt < %s -S -strip-debug -passes=inline | FileCheck %s
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;
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; RUN: opt < %s -S -passes=inline --try-experimental-debuginfo-iterators | FileCheck %s
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; https://bugs.llvm.org/show_bug.cgi?id=43291
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; The purpose of this test is to check if there is use_empty in the inner loop when scanning
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; blocks of allocas, if the alloca is use_empty, skip it when allocas inlining.
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declare void @use(ptr )
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define void @foo(i16 %k) !dbg !6 {
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call void @llvm.dbg.value(metadata i16 %k, metadata !14, metadata !DIExpression()), !dbg !15
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%alloca_a = alloca i32
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call void @llvm.dbg.value(metadata i16 %k, metadata !14, metadata !DIExpression()), !dbg !15
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%alloca_b = alloca [3 x i32]
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call void @llvm.dbg.value(metadata i16 %k, metadata !14, metadata !DIExpression()), !dbg !15
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%alloca_c = alloca i32
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call void @llvm.dbg.value(metadata i16 %k, metadata !14, metadata !DIExpression()), !dbg !15
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call void @use(ptr %alloca_a), !dbg !16
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call void @use(ptr %alloca_c), !dbg !16
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%_tmp23 = icmp ne i16 %k, 0
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br i1 %_tmp23, label %bb1, label %bb2
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bb1: ; preds = %0
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store i32 0, ptr %alloca_b
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br label %bb2
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bb2: ; preds = %bb1, %0
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ret void
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}
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define i16 @bar() !dbg !17 {
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; CHECK-LABEL: bar
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; CHECK: %alloca_a.i = alloca i32
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; CHECK-NOT: %alloca_b.i = alloca [3 x i32]
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; CHECK: %alloca_c.i = alloca i32
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call void @foo(i16 0), !dbg !20
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br label %bb1
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bb1: ; preds = %0
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ret i16 0
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}
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata) #0
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attributes #0 = { nounwind readnone speculatable willreturn }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!llvm.ident = !{!5}
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!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "Foo", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2, globals: !2)
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!1 = !DIFile(filename: "foo2.c", directory: "/tmp")
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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 = !{!"Foo"}
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!6 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 17, type: !7, scopeLine: 17, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
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!7 = !DISubroutineType(types: !8)
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!8 = !{!9, !13}
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!9 = !DIDerivedType(tag: DW_TAG_typedef, name: "int64_t", file: !10, line: 76, baseType: !11)
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!10 = !DIFile(filename: "stdint.h", directory: "/tmp")
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!11 = !DIDerivedType(tag: DW_TAG_typedef, name: "__i64_t", file: !1, baseType: !12)
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!12 = !DIBasicType(name: "signed long long", size: 64, encoding: DW_ATE_signed)
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!13 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_signed)
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!14 = !DILocalVariable(name: "k", arg: 1, scope: !6, file: !1, line: 17, type: !13)
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!15 = !DILocation(line: 0, scope: !6)
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!16 = !DILocation(line: 19, column: 3, scope: !6)
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!17 = distinct !DISubprogram(name: "g", scope: !1, file: !1, line: 8, type: !18, scopeLine: 8, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
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!18 = !DISubroutineType(types: !19)
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!19 = !{!13}
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!20 = !DILocation(line: 8, column: 7, scope: !17)
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