mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 04:02:41 +01:00
5b721561aa
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
66 lines
2.6 KiB
LLVM
66 lines
2.6 KiB
LLVM
; REQUIRES: object-emission
|
|
; PR 19261
|
|
|
|
; RUN: %llc_dwarf -fast-isel=false -O0 -filetype=obj %s -o %t
|
|
; RUN: llvm-dwarfdump %t | FileCheck %s
|
|
|
|
; CHECK: {{0x[0-9a-f]+}} 1 0 1 0 0 is_stmt
|
|
; CHECK: {{0x[0-9a-f]+}} 2 0 1 0 0 is_stmt
|
|
; CHECK: {{0x[0-9a-f]+}} 4 0 1 0 0 is_stmt
|
|
|
|
; IR generated from clang -O0 -g with the following source:
|
|
;void foo(int i){
|
|
; switch(i){
|
|
; default:
|
|
; break;
|
|
; }
|
|
; return;
|
|
;}
|
|
|
|
; Function Attrs: nounwind
|
|
define void @foo(i32 %i) #0 !dbg !4 {
|
|
entry:
|
|
%i.addr = alloca i32, align 4
|
|
store i32 %i, i32* %i.addr, align 4
|
|
call void @llvm.dbg.declare(metadata i32* %i.addr, metadata !12, metadata !DIExpression()), !dbg !13
|
|
%0 = load i32, i32* %i.addr, align 4, !dbg !14
|
|
switch i32 %0, label %sw.default [
|
|
], !dbg !14
|
|
|
|
sw.epilog: ; preds = %sw.default
|
|
ret void, !dbg !17
|
|
|
|
sw.default: ; preds = %entry
|
|
br label %sw.epilog, !dbg !15
|
|
|
|
}
|
|
|
|
; Function Attrs: nounwind readnone
|
|
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
|
|
|
|
attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
|
|
attributes #1 = { nounwind readnone }
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!9, !10}
|
|
!llvm.ident = !{!11}
|
|
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5.0 (204712)", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
|
|
!1 = !DIFile(filename: "test.c", directory: "D:\5Cwork\5CEPRs\5C396363")
|
|
!2 = !{}
|
|
!3 = !{!4}
|
|
!4 = distinct !DISubprogram(name: "foo", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 1, file: !1, scope: !5, type: !6, variables: !2)
|
|
!5 = !DIFile(filename: "test.c", directory: "D:CworkCEPRsC396363")
|
|
!6 = !DISubroutineType(types: !7)
|
|
!7 = !{null, !8}
|
|
!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
|
|
!9 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!10 = !{i32 1, !"Debug Info Version", i32 3}
|
|
!11 = !{!"clang version 3.5.0 (204712)"}
|
|
!12 = !DILocalVariable(name: "i", line: 1, arg: 1, scope: !4, file: !5, type: !8)
|
|
!13 = !DILocation(line: 1, scope: !4)
|
|
!14 = !DILocation(line: 2, scope: !4)
|
|
!15 = !DILocation(line: 4, scope: !16)
|
|
!16 = distinct !DILexicalBlock(line: 2, column: 0, file: !1, scope: !4)
|
|
!17 = !DILocation(line: 6, scope: !4)
|