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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
72 lines
3.6 KiB
LLVM
72 lines
3.6 KiB
LLVM
; RUN: llc -filetype=obj -O0 < %s -mtriple sparc64-unknown-linux-gnu | llvm-dwarfdump - | FileCheck %s --check-prefix=SPARC64
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; RUN: llc -filetype=obj -O0 < %s -mtriple sparc-unknown-linux-gnu | llvm-dwarfdump - | FileCheck %s --check-prefix=SPARC32
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; Check for DW_CFA_GNU_Window_save in debug_frame. Also, Ensure that relocations
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; are performed correctly in debug_info.
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; SPARC64: file format ELF64-sparc
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; SPARC64: .debug_info
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; SPARC64: DW_TAG_compile_unit
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; SPARC64: DW_AT_name [DW_FORM_strp] ( .debug_str[0x{{[0-9,A-F,a-f]+}}] = "hello.c")
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; SPARC64: DW_TAG_subprogram
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; SPARC64: DW_AT_name [DW_FORM_strp] ( .debug_str[0x{{[0-9,A-F,a-f]+}}] = "main")
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; SPARC64: DW_TAG_base_type
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; SPARC64: DW_AT_name [DW_FORM_strp] ( .debug_str[0x{{[0-9,A-F,a-f]+}}] = "int")
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; SPARC64: .debug_frame
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; SPARC64: DW_CFA_def_cfa_register
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; SPARC64-NEXT: DW_CFA_GNU_window_save
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; SPARC64-NEXT: DW_CFA_register
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; SPARC32: file format ELF32-sparc
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; SPARC32: .debug_info
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; SPARC32: DW_TAG_compile_unit
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; SPARC32: DW_AT_name [DW_FORM_strp] ( .debug_str[0x{{[0-9,A-F,a-f]+}}] = "hello.c")
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; SPARC32: DW_TAG_subprogram
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; SPARC32: DW_AT_name [DW_FORM_strp] ( .debug_str[0x{{[0-9,A-F,a-f]+}}] = "main")
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; SPARC32: DW_TAG_base_type
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; SPARC32: DW_AT_name [DW_FORM_strp] ( .debug_str[0x{{[0-9,A-F,a-f]+}}] = "int")
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; SPARC32: .debug_frame
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; SPARC32: DW_CFA_def_cfa_register
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; SPARC32-NEXT: DW_CFA_GNU_window_save
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; SPARC32-NEXT: DW_CFA_register
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@.str = private unnamed_addr constant [14 x i8] c"hello, world\0A\00", align 1
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; Function Attrs: nounwind
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define signext i32 @main() #0 !dbg !4 {
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entry:
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%retval = alloca i32, align 4
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store i32 0, i32* %retval
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%call = call signext i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i32 0, i32 0)), !dbg !12
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ret i32 0, !dbg !13
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}
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declare signext i32 @printf(i8*, ...) #1
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attributes #0 = { nounwind "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" }
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attributes #1 = { "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" }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!9, !10}
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!llvm.ident = !{!11}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5 (http://llvm.org/git/clang.git 6a0714fee07fb7c4e32d3972b4fe2ce2f5678cf4) (llvm/ 672e88e934757f76d5c5e5258be41e7615094844)", isOptimized: false, emissionKind: 0, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
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!1 = !DIFile(filename: "hello.c", directory: "/home/venkatra/work/benchmarks/test/hello")
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!2 = !{}
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!3 = !{!4}
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!4 = distinct !DISubprogram(name: "main", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 4, file: !1, scope: !5, type: !6, variables: !2)
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!5 = !DIFile(filename: "hello.c", directory: "/home/venkatra/work/benchmarks/test/hello")
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!6 = !DISubroutineType(types: !7)
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!7 = !{!8}
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!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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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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!11 = !{!"clang version 3.5 (http://llvm.org/git/clang.git 6a0714fee07fb7c4e32d3972b4fe2ce2f5678cf4) (llvm/ 672e88e934757f76d5c5e5258be41e7615094844)"}
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!12 = !DILocation(line: 5, scope: !4)
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!13 = !DILocation(line: 6, scope: !4)
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