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3de61b4c01
We now emit a line table for each compile unit. To reduce the prologue size of each line table, the files and directories used by each compile unit are stored in std::map<unsigned, std::vector< > > instead of std::vector< >. The prologue for a lto'ed image can be as big as 93K. Duplicating 93K for each compile unit causes a huge increase of debug info. With this patch, each prologue will only emit the files required by the compile unit. rdar://problem/13342023 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176605 91177308-0d34-0410-b5e6-96231b3b80d8
66 lines
3.9 KiB
LLVM
66 lines
3.9 KiB
LLVM
; RUN: llc -O0 %s -mtriple=x86_64-apple-darwin -filetype=obj -o %t
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; RUN: llvm-dwarfdump %t | FileCheck %s
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; rdar://13067005
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; CHECK: .debug_info contents:
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; CHECK: DW_TAG_compile_unit
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; CHECK: DW_AT_low_pc [DW_FORM_addr] (0x0000000000000000)
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; CHECK: DW_AT_stmt_list [DW_FORM_data4] (0x00000000)
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; CHECK: DW_TAG_compile_unit
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; CHECK: DW_AT_low_pc [DW_FORM_addr] (0x0000000000000000)
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; CHECK: DW_AT_stmt_list [DW_FORM_data4] (0x0000003c)
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; CHECK: .debug_line contents:
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; CHECK-NEXT: Line table prologue:
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; CHECK-NEXT: total_length: 0x00000038
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; CHECK: file_names[ 1] 0 0x00000000 0x00000000 simple.c
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; CHECK: Line table prologue:
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; CHECK-NEXT: total_length: 0x00000039
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; CHECK: file_names[ 1] 0 0x00000000 0x00000000 simple2.c
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; CHECK-NOT: file_names
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define i32 @test(i32 %a) nounwind uwtable ssp {
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entry:
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%a.addr = alloca i32, align 4
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store i32 %a, i32* %a.addr, align 4
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call void @llvm.dbg.declare(metadata !{i32* %a.addr}, metadata !15), !dbg !16
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%0 = load i32* %a.addr, align 4, !dbg !17
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%call = call i32 @fn(i32 %0), !dbg !17
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ret i32 %call, !dbg !17
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}
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declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
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define i32 @fn(i32 %a) nounwind uwtable ssp {
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entry:
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%a.addr = alloca i32, align 4
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store i32 %a, i32* %a.addr, align 4
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call void @llvm.dbg.declare(metadata !{i32* %a.addr}, metadata !19), !dbg !20
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%0 = load i32* %a.addr, align 4, !dbg !21
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ret i32 %0, !dbg !21
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}
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!llvm.dbg.cu = !{!0, !10}
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!0 = metadata !{i32 786449, i32 0, i32 12, metadata !"simple.c", metadata !"/private/tmp", metadata !"clang version 3.3", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !1} ; [ DW_TAG_compile_unit ]
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!1 = metadata !{metadata !2}
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!2 = metadata !{i32 0}
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!3 = metadata !{metadata !5}
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!5 = metadata !{i32 786478, i32 0, metadata !6, metadata !"test", metadata !"test", metadata !"", metadata !6, i32 2, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32)* @test, null, null, metadata !1, i32 3} ; [ DW_TAG_subprogram ] [line 2] [def] [scope 3] [test]
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!6 = metadata !{i32 786473, metadata !"simple.c", metadata !"/private/tmp", null} ; [ DW_TAG_file_type ]
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!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!8 = metadata !{metadata !9, metadata !9}
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!9 = metadata !{i32 786468, null, metadata !"int", null, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
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!10 = metadata !{i32 786449, i32 0, i32 12, metadata !"simple2.c", metadata !"/private/tmp", metadata !"clang version 3.3 (trunk 172862)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !11, metadata !1} ; [ DW_TAG_compile_unit ]
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!11 = metadata !{metadata !13}
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!13 = metadata !{i32 786478, i32 0, metadata !14, metadata !"fn", metadata !"fn", metadata !"", metadata !14, i32 1, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32)* @fn, null, null, metadata !1, i32 1} ; [ DW_TAG_subprogram ] [line 1] [def] [fn]
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!14 = metadata !{i32 786473, metadata !"simple2.c", metadata !"/private/tmp", null} ; [ DW_TAG_file_type ]
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!15 = metadata !{i32 786689, metadata !5, metadata !"a", metadata !6, i32 16777218, metadata !9, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [a] [line 2]
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!16 = metadata !{i32 2, i32 0, metadata !5, null}
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!17 = metadata !{i32 4, i32 0, metadata !18, null}
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!18 = metadata !{i32 786443, metadata !5, i32 3, i32 0, metadata !6, i32 0} ; [ DW_TAG_lexical_block ]
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!19 = metadata !{i32 786689, metadata !13, metadata !"a", metadata !14, i32 16777217, metadata !9, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [a] [line 1]
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!20 = metadata !{i32 1, i32 0, metadata !13, null}
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!21 = metadata !{i32 2, i32 0, metadata !22, null}
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!22 = metadata !{i32 786443, metadata !13, i32 1, i32 0, metadata !14, i32 0} ; [ DW_TAG_lexical_block ]
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