mirror of
https://github.com/RPCS3/llvm.git
synced 2025-02-27 06:08:11 +00:00

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
31 lines
1.2 KiB
LLVM
31 lines
1.2 KiB
LLVM
; RUN: llc -mtriple armv7-apple-darwin < %s | FileCheck %s
|
|
|
|
; Test that we don't pollute the start of the file with debug sections.
|
|
; This is particularly important on ARM MachO as a change in section order can
|
|
; cause a change the relaxation of the instructions used.
|
|
|
|
; CHECK: .section __TEXT,__text,regular,pure_instructions
|
|
; CHECK-NEXT: .syntax unified
|
|
; CHECK-NEXT: .globl _f
|
|
; CHECK-NEXT: .align 2
|
|
; CHECK-NEXT: _f: @ @f
|
|
|
|
; CHECK: .section __DWARF,__debug_str,regular,debug
|
|
|
|
define void @f() !dbg !4 {
|
|
ret void, !dbg !9
|
|
}
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!7, !8}
|
|
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "foo", isOptimized: true, runtimeVersion: 0, emissionKind: 1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
|
|
!1 = !DIFile(filename: "/foo/test.c", directory: "/foo")
|
|
!2 = !{}
|
|
!3 = !{!4}
|
|
!4 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 1, type: !5, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, variables: !2)
|
|
!5 = !DISubroutineType(types: !6)
|
|
!6 = !{null}
|
|
!7 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!8 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!9 = !DILocation(line: 1, column: 15, scope: !4)
|