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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
53 lines
2.2 KiB
LLVM
53 lines
2.2 KiB
LLVM
; RUN: llc -mtriple thumbv7--windows-itanium -filetype obj -o - %s \
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; RUN: | llvm-readobj -r - | FileCheck %s -check-prefix CHECK-ITANIUM
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; RUN: sed -e 's/"Dwarf Version"/"CodeView"/' %s \
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; RUN: | llc -mtriple thumbv7--windows-msvc -filetype obj -o - \
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; RUN: | llvm-readobj -r - | FileCheck %s -check-prefix CHECK-MSVC
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; ModuleID = '/Users/compnerd/work/llvm/test/MC/ARM/reduced.c'
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target datalayout = "e-m:e-p:32:32-i1:8:32-i8:8:32-i16:16:32-i64:64-v128:64:128-a:0:32-n32-S64"
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target triple = "thumbv7--windows-itanium"
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define arm_aapcs_vfpcc void @function() !dbg !1 {
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entry:
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ret void, !dbg !0
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}
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!llvm.dbg.cu = !{!7}
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!llvm.module.flags = !{!9, !10}
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!0 = !DILocation(line: 1, scope: !1)
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!1 = distinct !DISubprogram(name: "function", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, scopeLine: 1, file: !2, scope: !3, type: !4, variables: !6)
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!2 = !DIFile(filename: "/Users/compnerd/work/llvm/test/MC/ARM/reduced.c", directory: "/Users/compnerd/work/llvm")
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!3 = !DIFile(filename: "/Users/compnerd/work/llvm/test/MC/ARM/reduced.c", directory: "/Users/compnerd/work/llvm")
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!4 = !DISubroutineType(types: !5)
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!5 = !{null}
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!6 = !{}
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!7 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5.0", isOptimized: false, emissionKind: 1, file: !2, enums: !6, retainedTypes: !6, subprograms: !8, globals: !6, imports: !6)
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!8 = !{!1}
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!9 = !{i32 2, !"Dwarf Version", i32 4}
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!10 = !{i32 1, !"Debug Info Version", i32 3}
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; CHECK-ITANIUM: Relocations [
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; CHECK-ITANIUM: Section {{.*}} .debug_info {
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; CHECK-ITANIUM: 0x6 IMAGE_REL_ARM_SECREL .debug_abbrev
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; CHECK-ITANIUM: 0xC IMAGE_REL_ARM_SECREL .debug_str
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; CHECK-ITANIUM: 0x12 IMAGE_REL_ARM_SECREL .debug_str
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; CHECK-ITANIUM: 0x16 IMAGE_REL_ARM_SECREL .debug_line
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; CHECK-ITANIUM: }
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; CHECK-ITANIUM: Section {{.*}}.debug_pubnames {
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; CHECK-ITANIUM: 0x6 IMAGE_REL_ARM_SECREL .debug_info
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; CHECK-ITANIUM: }
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; CHECK-ITANIUM: ]
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; CHECK-MSVC: Relocations [
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; CHECK-MSVC: Section {{.*}} .debug$S {
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; CHECK-MSVC: 0x2C IMAGE_REL_ARM_SECREL function
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; CHECK-MSVC: 0x30 IMAGE_REL_ARM_SECTION function
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; CHECK-MSVC: 0x48 IMAGE_REL_ARM_SECREL function
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; CHECK-MSVC: 0x4C IMAGE_REL_ARM_SECTION function
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; CHECK-MSVC: }
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; CHECK-MSVC: ]
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