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Previously, subprograms contained a metadata reference to the function they described. Because most clients need to get or set a subprogram for a given function rather than the other way around, this created unneeded inefficiency. For example, many passes needed to call the function llvm::makeSubprogramMap() to build a mapping from functions to subprograms, and the IR linker needed to fix up function references in a way that caused quadratic complexity in the IR linking phase of LTO. This change reverses the direction of the edge by storing the subprogram as function-level metadata and removing DISubprogram's function field. Since this is an IR change, a bitcode upgrade has been provided. Fixes PR23367. An upgrade script for textual IR for out-of-tree clients is attached to the PR. Differential Revision: http://reviews.llvm.org/D14265 llvm-svn: 252219
64 lines
2.7 KiB
LLVM
64 lines
2.7 KiB
LLVM
; RUN: opt %s -sroa -verify -S -o - | FileCheck %s
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; ModuleID = 'test.c'
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; Test that SROA updates the debug info correctly if an alloca was rewritten but
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; not partitioned into multiple allocas.
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;
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; CHECK: call void @llvm.dbg.value(metadata float %s.coerce, i64 0, metadata ![[VAR:[0-9]+]], metadata ![[EXPR:[0-9]+]])
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; CHECK: ![[VAR]] = !DILocalVariable(name: "s",{{.*}} line: 3,
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; CHECK: ![[EXPR]] = !DIExpression(
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; CHECK-NOT: DW_OP_bit_piece
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;
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; struct S { float f; };
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;
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; float foo(struct S s) {
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; return s.f;
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; }
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.10.0"
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%struct.S = type { float }
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; Function Attrs: nounwind ssp uwtable
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define float @foo(float %s.coerce) #0 !dbg !4 {
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entry:
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%s = alloca %struct.S, align 4
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%coerce.dive = getelementptr %struct.S, %struct.S* %s, i32 0, i32 0
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store float %s.coerce, float* %coerce.dive, align 1
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call void @llvm.dbg.declare(metadata %struct.S* %s, metadata !16, metadata !17), !dbg !18
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%f = getelementptr inbounds %struct.S, %struct.S* %s, i32 0, i32 0, !dbg !19
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%0 = load float, float* %f, align 4, !dbg !19
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ret float %0, !dbg !19
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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attributes #0 = { nounwind ssp uwtable }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!12, !13, !14}
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!llvm.ident = !{!15}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.6.0 ", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
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!1 = !DIFile(filename: "test.c", directory: "/Volumes/Data/llvm/_build.ninja.debug")
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!2 = !{}
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!3 = !{!4}
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!4 = distinct !DISubprogram(name: "foo", line: 3, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 3, file: !1, scope: !5, type: !6, variables: !2)
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!5 = !DIFile(filename: "test.c", directory: "/Volumes/Data/llvm/_build.ninja.debug")
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!6 = !DISubroutineType(types: !7)
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!7 = !{!8, !9}
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!8 = !DIBasicType(tag: DW_TAG_base_type, name: "float", size: 32, align: 32, encoding: DW_ATE_float)
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!9 = !DICompositeType(tag: DW_TAG_structure_type, name: "S", line: 1, size: 32, align: 32, file: !1, elements: !10)
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!10 = !{!11}
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!11 = !DIDerivedType(tag: DW_TAG_member, name: "f", line: 1, size: 32, align: 32, file: !1, scope: !9, baseType: !8)
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!12 = !{i32 2, !"Dwarf Version", i32 2}
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!13 = !{i32 2, !"Debug Info Version", i32 3}
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!14 = !{i32 1, !"PIC Level", i32 2}
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!15 = !{!"clang version 3.6.0 "}
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!16 = !DILocalVariable(name: "s", line: 3, arg: 1, scope: !4, file: !5, type: !9)
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!17 = !DIExpression()
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!18 = !DILocation(line: 3, column: 20, scope: !4)
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!19 = !DILocation(line: 4, column: 2, scope: !4)
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