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5f220beefc
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 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@252219 91177308-0d34-0410-b5e6-96231b3b80d8
119 lines
5.0 KiB
LLVM
119 lines
5.0 KiB
LLVM
; RUN: llc %s -filetype=obj -o %t.o
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; RUN: llvm-dwarfdump -debug-dump=info %t.o | FileCheck %s
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; Test emitting a constant for an aggregate type.
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;
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; clang -S -O1 -emit-llvm
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;
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; typedef struct { unsigned i; } S;
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;
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; unsigned foo(S s) {
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; s.i = 1;
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; return s.i;
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; }
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;
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; class C { public: unsigned i; };
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;
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; unsigned foo(C c) {
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; c.i = 2;
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; return c.i;
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; }
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;
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; unsigned bar() {
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; int a[1] = { 3 };
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; return a[0];
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; }
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;
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; CHECK: DW_TAG_formal_parameter
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; CHECK-NEXT: DW_AT_const_value [DW_FORM_udata] (1)
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; CHECK-NEXT: DW_AT_name {{.*}} "s"
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;
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; CHECK: DW_TAG_formal_parameter
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; CHECK-NEXT: DW_AT_const_value [DW_FORM_udata] (2)
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; CHECK-NEXT: DW_AT_name {{.*}} "c"
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;
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; CHECK: DW_TAG_variable
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; CHECK-NEXT: DW_AT_const_value [DW_FORM_udata] (3)
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; CHECK-NEXT: DW_AT_name {{.*}} "a"
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; ModuleID = 'sroasplit-4.cpp'
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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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; Function Attrs: nounwind readnone ssp uwtable
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define i32 @_Z3foo1S(i32 %s.coerce) #0 !dbg !12 {
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entry:
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tail call void @llvm.dbg.value(metadata i32 %s.coerce, i64 0, metadata !18, metadata !37), !dbg !38
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tail call void @llvm.dbg.value(metadata i32 1, i64 0, metadata !18, metadata !37), !dbg !38
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ret i32 1, !dbg !39
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}
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; Function Attrs: nounwind readnone ssp uwtable
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define i32 @_Z3foo1C(i32 %c.coerce) #0 !dbg !19 {
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entry:
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tail call void @llvm.dbg.value(metadata i32 %c.coerce, i64 0, metadata !23, metadata !37), !dbg !40
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tail call void @llvm.dbg.value(metadata i32 2, i64 0, metadata !23, metadata !37), !dbg !40
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ret i32 2, !dbg !41
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}
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; Function Attrs: nounwind readnone ssp uwtable
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define i32 @_Z3barv() #0 !dbg !24 {
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entry:
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tail call void @llvm.dbg.value(metadata i32 3, i64 0, metadata !28, metadata !37), !dbg !42
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ret i32 3, !dbg !43
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
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attributes #0 = { nounwind readnone 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 = !{!33, !34, !35}
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!llvm.ident = !{!36}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.6.0 (trunk 225364) (llvm/trunk 225366)", isOptimized: true, emissionKind: 1, file: !1, enums: !2, retainedTypes: !3, subprograms: !11, globals: !2, imports: !2)
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!1 = !DIFile(filename: "sroasplit-4.cpp", directory: "")
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!2 = !{}
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!3 = !{!4, !8}
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!4 = !DICompositeType(tag: DW_TAG_structure_type, line: 1, size: 32, align: 32, file: !1, elements: !5, identifier: "_ZTS1S")
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!5 = !{!6}
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!6 = !DIDerivedType(tag: DW_TAG_member, name: "i", line: 1, size: 32, align: 32, file: !1, scope: !"_ZTS1S", baseType: !7)
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!7 = !DIBasicType(tag: DW_TAG_base_type, name: "unsigned int", size: 32, align: 32, encoding: DW_ATE_unsigned)
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!8 = !DICompositeType(tag: DW_TAG_class_type, name: "C", line: 8, size: 32, align: 32, file: !1, elements: !9, identifier: "_ZTS1C")
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!9 = !{!10}
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!10 = !DIDerivedType(tag: DW_TAG_member, name: "i", line: 8, size: 32, align: 32, flags: DIFlagPublic, file: !1, scope: !"_ZTS1C", baseType: !7)
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!11 = !{!12, !19, !24}
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!12 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foo1S", line: 3, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 3, file: !1, scope: !13, type: !14, variables: !17)
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!13 = !DIFile(filename: "sroasplit-4.cpp", directory: "")
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!14 = !DISubroutineType(types: !15)
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!15 = !{!7, !16}
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!16 = !DIDerivedType(tag: DW_TAG_typedef, name: "S", line: 1, file: !1, baseType: !"_ZTS1S")
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!17 = !{!18}
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!18 = !DILocalVariable(name: "s", line: 3, arg: 1, scope: !12, file: !13, type: !16)
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!19 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foo1C", line: 10, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 10, file: !1, scope: !13, type: !20, variables: !22)
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!20 = !DISubroutineType(types: !21)
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!21 = !{!7, !"_ZTS1C"}
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!22 = !{!23}
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!23 = !DILocalVariable(name: "c", line: 10, arg: 1, scope: !19, file: !13, type: !"_ZTS1C")
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!24 = distinct !DISubprogram(name: "bar", linkageName: "_Z3barv", line: 15, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 15, file: !1, scope: !13, type: !25, variables: !27)
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!25 = !DISubroutineType(types: !26)
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!26 = !{!7}
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!27 = !{!28}
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!28 = !DILocalVariable(name: "a", line: 16, scope: !24, file: !13, type: !29)
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!29 = !DICompositeType(tag: DW_TAG_array_type, size: 32, align: 32, baseType: !30, elements: !31)
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!30 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!31 = !{!32}
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!32 = !DISubrange(count: 1)
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!33 = !{i32 2, !"Dwarf Version", i32 2}
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!34 = !{i32 2, !"Debug Info Version", i32 3}
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!35 = !{i32 1, !"PIC Level", i32 2}
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!36 = !{!"clang version 3.6.0 (trunk 225364) (llvm/trunk 225366)"}
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!37 = !DIExpression()
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!38 = !DILocation(line: 3, column: 16, scope: !12)
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!39 = !DILocation(line: 5, column: 3, scope: !12)
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!40 = !DILocation(line: 10, column: 16, scope: !19)
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!41 = !DILocation(line: 12, column: 3, scope: !19)
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!42 = !DILocation(line: 16, column: 6, scope: !24)
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!43 = !DILocation(line: 17, column: 3, scope: !24)
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