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llvm-project/llvm/test/DebugInfo/lto-comp-dir.ll

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DebugInfo: Move line table zero-directory-index (compilation dir) handling into MCDwarf Our handling of compilation directory in DwarfDebug was broken (incorrectly using the 'last' compilation directory (that of the last CU in the metadata list) for all function emission in any CU). By moving this handling down into MCDwarf the issue is fixed as the compilation dir is tracked correctly per line table. llvm-svn: 204089
2014-03-18 07:29:40 +08:00
; RUN: %llc_dwarf < %s -filetype=obj | llvm-dwarfdump -debug-dump=line - | FileCheck %s
DebugInfo: Do not rely on the compilation dir (index 0) for files in line tables shared between compilation units When emitting assembly there's no support for emitting separate line tables for each compilation unit - so LLVM emits .loc directives producing a single line table. Line tables have an implicit directory (index 0) equal to the compilation directory (DW_AT_comp_dir) of the compilation unit that references them. If multiple compilation units (with possibly disparate compilation directories) reference the same line table, we must avoid relying on this ambiguous directory. Achieve this my simply not setting the compilation directory on the line table when we're in this situation (multiple units while emitting assembly). llvm-svn: 204094
2014-03-18 08:11:48 +08:00
; RUN: %llc_dwarf < %s -filetype=asm | FileCheck --check-prefix=ASM %s
DebugInfo: Move line table zero-directory-index (compilation dir) handling into MCDwarf Our handling of compilation directory in DwarfDebug was broken (incorrectly using the 'last' compilation directory (that of the last CU in the metadata list) for all function emission in any CU). By moving this handling down into MCDwarf the issue is fixed as the compilation dir is tracked correctly per line table. llvm-svn: 204089
2014-03-18 07:29:40 +08:00
; CHECK: .debug_line contents:
; CHECK-NEXT: Line table prologue:
; CHECK-NOT: include_directories
; CHECK: file_names[ 1] 0 {{.*}} a.cpp
; CHECK-NOT: file_names
; CHECK: Line table prologue:
; CHECK-NOT: include_directories
; CHECK: file_names[ 1] 0 {{.*}} b.cpp
; CHECK-NOT: file_names
DebugInfo: Do not rely on the compilation dir (index 0) for files in line tables shared between compilation units When emitting assembly there's no support for emitting separate line tables for each compilation unit - so LLVM emits .loc directives producing a single line table. Line tables have an implicit directory (index 0) equal to the compilation directory (DW_AT_comp_dir) of the compilation unit that references them. If multiple compilation units (with possibly disparate compilation directories) reference the same line table, we must avoid relying on this ambiguous directory. Achieve this my simply not setting the compilation directory on the line table when we're in this situation (multiple units while emitting assembly). llvm-svn: 204094
2014-03-18 08:11:48 +08:00
; ASM: .file 1 "/tmp/dbginfo/a/a.cpp"
; ASM: .file 2 "/tmp/dbginfo/b/b.cpp"
DebugInfo: Move line table zero-directory-index (compilation dir) handling into MCDwarf Our handling of compilation directory in DwarfDebug was broken (incorrectly using the 'last' compilation directory (that of the last CU in the metadata list) for all function emission in any CU). By moving this handling down into MCDwarf the issue is fixed as the compilation dir is tracked correctly per line table. llvm-svn: 204089
2014-03-18 07:29:40 +08:00
; Generated from the following source compiled to bitcode from within their
; respective directories (with debug info) and linked together with llvm-link
; a/a.cpp
; void func() {
; }
; b/b.cpp
; void func();
; int main() {
; func();
; }
; Function Attrs: nounwind uwtable
define void @_Z4funcv() #0 {
entry:
ret void, !dbg !19
}
; Function Attrs: uwtable
define i32 @main() #1 {
entry:
call void @_Z4funcv(), !dbg !20
ret i32 0, !dbg !21
}
attributes #0 = { nounwind uwtable "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" }
attributes #1 = { uwtable "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" }
!llvm.dbg.cu = !{!0, !8}
!llvm.module.flags = !{!16, !17}
!llvm.ident = !{!18, !18}
!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.5.0 ", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !"", i32 1}
!1 = metadata !{metadata !"a.cpp", metadata !"/tmp/dbginfo/a"}
!2 = metadata !{}
!3 = metadata !{metadata !4}
!4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"func", metadata !"func", metadata !"_Z4funcv", i32 1, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void ()* @_Z4funcv, null, null, metadata !2, i32 1} ; [ DW_TAG_subprogram ] [line 1] [def] [func]
!5 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [/tmp/dbginfo/a/a.cpp]
!6 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!7 = metadata !{null}
!8 = metadata !{i32 786449, metadata !9, i32 4, metadata !"clang version 3.5.0 ", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !10, metadata !2, metadata !2, metadata !"", i32 1}
!9 = metadata !{metadata !"b.cpp", metadata !"/tmp/dbginfo/b"}
!10 = metadata !{metadata !11}
!11 = metadata !{i32 786478, metadata !9, metadata !12, metadata !"main", metadata !"main", metadata !"", i32 2, metadata !13, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 ()* @main, null, null, metadata !2, i32 2} ; [ DW_TAG_subprogram ] [line 2] [def] [main]
!12 = metadata !{i32 786473, metadata !9} ; [ DW_TAG_file_type ] [/tmp/dbginfo/b/b.cpp]
!13 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !14, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!14 = metadata !{metadata !15}
!15 = metadata !{i32 786468, null, null, metadata !"int", 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]
!16 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
!17 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
!18 = metadata !{metadata !"clang version 3.5.0 "}
!19 = metadata !{i32 2, i32 0, metadata !4, null}
!20 = metadata !{i32 3, i32 0, metadata !11, null}
!21 = metadata !{i32 4, i32 0, metadata !11, null}