d4bff30370
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
38 lines
1.6 KiB
LLVM
38 lines
1.6 KiB
LLVM
; RUN: opt < %s -dfsan -dfsan-abilist=%S/Inputs/debuglist.txt -S | FileCheck %s
|
|
|
|
; CHECK: define i32 @main() {{.*}} !dbg [[SP:![0-9]+]]
|
|
; CHECK: [[SP]] = distinct !DISubprogram(name: "main"
|
|
|
|
; Generated from a simple source file compiled with clang -g:
|
|
; int main() {
|
|
; }
|
|
|
|
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-unknown-linux-gnu"
|
|
|
|
; Function Attrs: nounwind uwtable
|
|
define i32 @main() #0 !dbg !4 {
|
|
entry:
|
|
ret i32 0, !dbg !12
|
|
}
|
|
|
|
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" }
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!9, !10}
|
|
!llvm.ident = !{!11}
|
|
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.6.0 ", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
|
|
!1 = !DIFile(filename: "debug.cpp", directory: "/tmp/dbginfo")
|
|
!2 = !{}
|
|
!3 = !{!4}
|
|
!4 = distinct !DISubprogram(name: "main", line: 1, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 1, file: !1, scope: !5, type: !6, variables: !2)
|
|
!5 = !DIFile(filename: "debug.cpp", directory: "/tmp/dbginfo")
|
|
!6 = !DISubroutineType(types: !7)
|
|
!7 = !{!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 2, !"Debug Info Version", i32 3}
|
|
!11 = !{!"clang version 3.6.0 "}
|
|
!12 = !DILocation(line: 2, column: 1, scope: !4)
|