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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
45 lines
1.6 KiB
LLVM
45 lines
1.6 KiB
LLVM
; RUN: llc -mtriple=armv7-linux-gnueabihf %s -o - | FileCheck %s
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; Generated from:
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; void stack_offsets() {
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; asm("" ::: "d8", "d9", "d11", "d13");
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; }
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; Compiled with: "clang -target armv7-linux-gnueabihf -O3"
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; The important point we're checking here is that the .cfi directives describe
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; the layout of the VFP registers correctly. The fact that the numbers are
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; monotonic in memory is also a nice property to have.
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define void @stack_offsets() !dbg !4 {
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; CHECK-LABEL: stack_offsets:
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; CHECK: vpush {d13}
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; CHECK: vpush {d11}
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; CHECK: vpush {d8, d9}
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; CHECK: .cfi_offset {{269|d13}}, -8
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; CHECK: .cfi_offset {{267|d11}}, -16
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; CHECK: .cfi_offset {{265|d9}}, -24
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; CHECK: .cfi_offset {{264|d8}}, -32
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; CHECK: vpop {d8, d9}
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; CHECK: vpop {d11}
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; CHECK: vpop {d13}
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call void asm sideeffect "", "~{d8},~{d9},~{d11},~{d13}"() #1
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ret void
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!8, !9}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
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!1 = !DIFile(filename: "tmp.c", directory: "/Users/tim/llvm/build")
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!2 = !{}
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!3 = !{!4}
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!4 = distinct !DISubprogram(name: "bar", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, scopeLine: 1, file: !1, scope: !5, type: !6, variables: !2)
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!5 = !DIFile(filename: "tmp.c", directory: "/Users/tim/llvm/build")
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!6 = !DISubroutineType(types: !7)
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!7 = !{null}
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!8 = !{i32 2, !"Dwarf Version", i32 4}
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!9 = !{i32 1, !"Debug Info Version", i32 3}
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