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5f220beefc
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
41 lines
1.8 KiB
LLVM
41 lines
1.8 KiB
LLVM
; RUN: llc -mtriple=aarch64-non-linux-gnu -dwarf-version=4 < %s -filetype=obj \
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; RUN: | llvm-dwarfdump - | FileCheck -check-prefix=CHECK -check-prefix=CHECK-4 %s
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; RUN: llc -mtriple=aarch64-non-linux-gnu -dwarf-version=3 < %s -filetype=obj \
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; RUN: | llvm-dwarfdump - | FileCheck -check-prefix=CHECK -check-prefix=CHECK-3 %s
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; We're mostly checking that relocations are applied correctly
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; here. Currently R_AARCH64_ABS32 is used for references to debug data
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; and R_AARCH64_ABS64 is used for program addresses.
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; A couple of ABS32s, both at 0 and elsewhere, interpreted correctly:
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; CHECK: DW_AT_producer [DW_FORM_strp] ( .debug_str[0x00000000] = "clang version 3.3 ")
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; CHECK: DW_AT_name [DW_FORM_strp] ( .debug_str[0x00000013] = "tmp.c")
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; A couple of ABS64s similarly:
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; CHECK: DW_AT_low_pc [DW_FORM_addr] (0x0000000000000000)
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; CHECK-4: DW_AT_high_pc [DW_FORM_data4] (0x00000008)
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; CHECK-3: DW_AT_high_pc [DW_FORM_addr] (0x0000000000000008)
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define i32 @main() nounwind !dbg !3 {
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ret i32 0, !dbg !8
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}
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attributes #0 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!10}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.3 ", isOptimized: false, emissionKind: 0, file: !9, enums: !1, retainedTypes: !1, subprograms: !2, globals: !1, imports: !1)
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!1 = !{}
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!2 = !{!3}
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!3 = distinct !DISubprogram(name: "main", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, scopeLine: 1, file: !9, scope: !4, type: !5, variables: !1)
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!4 = !DIFile(filename: "tmp.c", directory: "/home/tim/llvm/build")
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!5 = !DISubroutineType(types: !6)
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!6 = !{!7}
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!7 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!8 = !DILocation(line: 2, scope: !3)
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!9 = !DIFile(filename: "tmp.c", directory: "/home/tim/llvm/build")
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!10 = !{i32 1, !"Debug Info Version", i32 3}
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