4424903156
This patch updates the last few places in LLVM using findDbgValues that don't also collect and handle DPValue objects. This largely involves instcombine and mem2reg changes, and are largely mechanical, calling existing utilities on collections of DPValues instead of just DbgValuesInsts. A variety of tests have had RemoveDIs RUN lines added to them to cover these behaviours. We have some technical debt of the instcombine sinking code for DPValues not being implemented yet, so I've left FIXME stubs indicating that we intend to cover tests with RemoveDIs but haven't yet.
70 lines
2.9 KiB
LLVM
70 lines
2.9 KiB
LLVM
; RUN: opt -passes=instcombine -S %s -o - | FileCheck %s
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; RUN: opt -passes=instcombine -S %s -o - --try-experimental-debuginfo-iterators | FileCheck %s
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; In this example, the cast from ptr to ptr becomes trivially dead. We should
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; salvage its debug info.
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; C source:
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; void use_as_void(ptr);
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; void f(ptr p) {
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; int *q = (int *)p;
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; use_as_void(q);
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; }
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; ModuleID = '<stdin>'
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source_filename = "t.c"
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target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc19.11.25508"
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; Function Attrs: nounwind uwtable
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define void @f(ptr %p) !dbg !11 {
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entry:
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call void @llvm.dbg.value(metadata ptr %p, metadata !16, metadata !DIExpression()), !dbg !18
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call void @llvm.dbg.value(metadata ptr %p, metadata !17, metadata !DIExpression()), !dbg !20
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call void @use_as_void(ptr %p), !dbg !22
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ret void, !dbg !23
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}
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; CHECK-LABEL: define void @f(ptr %p)
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; CHECK: call void @llvm.dbg.value(metadata ptr %p, metadata ![[P_VAR:[0-9]+]], metadata !DIExpression())
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; CHECK-NOT: bitcast
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; CHECK: call void @llvm.dbg.value(metadata ptr %p, metadata ![[Q_VAR:[0-9]+]], metadata !DIExpression())
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; CHECK-NOT: bitcast
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; CHECK: ret void
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; CHECK: ![[P_VAR]] = !DILocalVariable(name: "p", {{.*}})
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; CHECK: ![[Q_VAR]] = !DILocalVariable(name: "q", {{.*}})
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declare void @use_as_void(ptr)
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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 = !{!6, !7, !8, !9}
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!llvm.ident = !{!10}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3)
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!1 = !DIFile(filename: "t.c", directory: "C:\5Csrc\5Cllvm-project\5Cbuild", checksumkind: CSK_MD5, checksum: "56c40617ada23a8cccbd9a16bcec57af")
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!2 = !{}
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!3 = !{!4}
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!4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 64)
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!5 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!6 = !{i32 2, !"CodeView", i32 1}
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!7 = !{i32 2, !"Debug Info Version", i32 3}
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!8 = !{i32 1, !"wchar_size", i32 2}
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!9 = !{i32 7, !"PIC Level", i32 2}
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!10 = !{!"clang version 6.0.0 "}
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!11 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 2, type: !12, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !15)
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!12 = !DISubroutineType(types: !13)
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!13 = !{null, !14}
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!14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
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!15 = !{!16, !17}
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!16 = !DILocalVariable(name: "p", arg: 1, scope: !11, file: !1, line: 2, type: !14)
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!17 = !DILocalVariable(name: "q", scope: !11, file: !1, line: 3, type: !4)
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!18 = !DILocation(line: 2, column: 14, scope: !11)
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!19 = !DILocation(line: 3, column: 12, scope: !11)
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!20 = !DILocation(line: 3, column: 8, scope: !11)
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!21 = !DILocation(line: 4, column: 15, scope: !11)
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!22 = !DILocation(line: 4, column: 3, scope: !11)
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!23 = !DILocation(line: 5, column: 1, scope: !11)
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