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
68 lines
2.9 KiB
LLVM
68 lines
2.9 KiB
LLVM
; REQUIRES: object-emission
|
|
|
|
; RUN: llc -mtriple=x86_64-linux -O0 -filetype=obj < %s \
|
|
; RUN: | llvm-dwarfdump -debug-dump=info - | FileCheck --check-prefix=CHECK --check-prefix=CHECK-V4 %s
|
|
; RUN: llc -mtriple=x86_64-linux -dwarf-version=3 -O0 -filetype=obj < %s \
|
|
; RUN: | llvm-dwarfdump -debug-dump=info - | FileCheck --check-prefix=CHECK --check-prefix=CHECK-V3 %s
|
|
|
|
; Check that we emit DW_TAG_lexical_block and that it has the right encoding
|
|
; depending on the dwarf version.
|
|
|
|
; CHECK: DW_TAG_lexical_block
|
|
; CHECK-NOT: DW_TAG
|
|
; CHECK: DW_AT_low_pc [DW_FORM_addr]
|
|
; CHECK-NOT: DW_TAG
|
|
; CHECK-V4: DW_AT_high_pc [DW_FORM_data4]
|
|
; CHECK-V3: DW_AT_high_pc [DW_FORM_addr]
|
|
|
|
; Test case produced from:
|
|
; void b() {
|
|
; if (int i = 3)
|
|
; return;
|
|
; }
|
|
|
|
; Function Attrs: nounwind uwtable
|
|
define void @_Z1bv() #0 !dbg !4 {
|
|
entry:
|
|
%i = alloca i32, align 4
|
|
call void @llvm.dbg.declare(metadata i32* %i, metadata !11, metadata !DIExpression()), !dbg !14
|
|
store i32 3, i32* %i, align 4, !dbg !14
|
|
%0 = load i32, i32* %i, align 4, !dbg !14
|
|
%tobool = icmp ne i32 %0, 0, !dbg !14
|
|
br i1 %tobool, label %if.then, label %if.end, !dbg !14
|
|
|
|
if.then: ; preds = %entry
|
|
br label %if.end, !dbg !15
|
|
|
|
if.end: ; preds = %if.then, %entry
|
|
ret void, !dbg !16
|
|
}
|
|
|
|
; Function Attrs: nounwind readnone
|
|
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
|
|
|
|
attributes #0 = { nounwind uwtable "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 = !{!8, !9}
|
|
!llvm.ident = !{!10}
|
|
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
|
|
!1 = !DIFile(filename: "lexical_block.cpp", directory: "/tmp/dbginfo")
|
|
!2 = !{}
|
|
!3 = !{!4}
|
|
!4 = distinct !DISubprogram(name: "b", linkageName: "_Z1bv", 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: "lexical_block.cpp", directory: "/tmp/dbginfo")
|
|
!6 = !DISubroutineType(types: !7)
|
|
!7 = !{null}
|
|
!8 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!9 = !{i32 1, !"Debug Info Version", i32 3}
|
|
!10 = !{!"clang version 3.5.0 "}
|
|
!11 = !DILocalVariable(name: "i", line: 2, scope: !12, file: !5, type: !13)
|
|
!12 = distinct !DILexicalBlock(line: 2, column: 0, file: !1, scope: !4)
|
|
!13 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
|
|
!14 = !DILocation(line: 2, scope: !12)
|
|
!15 = !DILocation(line: 3, scope: !12)
|
|
!16 = !DILocation(line: 4, scope: !4)
|