1 ; REQUIRES: object-emission 2 3 ; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s 4 5 ; Testing that two distinct (distinct by writing them in separate files, while 6 ; still fulfilling C++'s ODR by having identical token sequences) functions, 7 ; linked under LTO, get plausible debug info (and don't crash). 8 9 ; Built from source: 10 ; $ clang++ a.cpp b.cpp -g -c -emit-llvm 11 ; $ llvm-link a.bc b.bc -o ab.bc 12 13 ; This change is intended to tickle a case where the subprogram MDNode 14 ; associated with the llvm::Function will differ from the subprogram 15 ; referenced by the DbgLocs in the function. 16 17 ; $ sed -ie "s/!12, !0/!0, !12/" ab.ll 18 ; $ cat a.cpp 19 ; inline int func(int i) { 20 ; return i * 2; 21 ; } 22 ; int (*x)(int) = &func; 23 ; $ cat b.cpp 24 ; inline int func(int i) { 25 ; return i * 2; 26 ; } 27 ; int (*y)(int) = &func; 28 29 ; CHECK: DW_TAG_compile_unit 30 ; CHECK: DW_TAG_subprogram 31 ; CHECK-NOT: DW_TAG 32 ; CHECK: DW_AT_name {{.*}} "func" 33 ; CHECK: DW_TAG_compile_unit 34 35 ; FIXME: Maybe we should drop the subprogram here - since the function was 36 ; emitted in one CU, due to linkonce_odr uniquing. We certainly don't emit the 37 ; subprogram here if the source location for this definition is the same (see 38 ; test/DebugInfo/cross-cu-linkonce.ll), though it's very easy to tickle that 39 ; into failing even without duplicating the source as has been done in this 40 ; case (two cpp files in different directories, including the same header that 41 ; contains an inline function - clang will produce distinct subprogram metadata 42 ; that won't deduplicate owing to the file location information containing the 43 ; directory of the source file even though the file name is absolute, not 44 ; relative) 45 46 ; CHECK: DW_TAG_subprogram 47 48 @x = global i32 (i32)* @_Z4funci, align 8 49 @y = global i32 (i32)* @_Z4funci, align 8 50 51 ; Function Attrs: inlinehint nounwind uwtable 52 define linkonce_odr i32 @_Z4funci(i32 %i) #0 { 53 %1 = alloca i32, align 4 54 store i32 %i, i32* %1, align 4 55 call void @llvm.dbg.declare(metadata !{i32* %1}, metadata !22), !dbg !23 56 %2 = load i32* %1, align 4, !dbg !24 57 %3 = mul nsw i32 %2, 2, !dbg !24 58 ret i32 %3, !dbg !24 59 } 60 61 ; Function Attrs: nounwind readnone 62 declare void @llvm.dbg.declare(metadata, metadata) #1 63 64 attributes #0 = { inlinehint 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" } 65 attributes #1 = { nounwind readnone } 66 67 !llvm.dbg.cu = !{!12, !0} 68 !llvm.module.flags = !{!19, !20} 69 !llvm.ident = !{!21, !21} 70 71 !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 !9, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/a.cpp] [DW_LANG_C_plus_plus] 72 !1 = metadata !{metadata !"a.cpp", metadata !"/tmp/dbginfo"} 73 !2 = metadata !{} 74 !3 = metadata !{metadata !4} 75 !4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"func", metadata !"func", metadata !"_Z4funci", i32 1, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32)* @_Z4funci, null, null, metadata !2, i32 1} ; [ DW_TAG_subprogram ] [line 1] [def] [func] 76 !5 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [/tmp/dbginfo/a.cpp] 77 !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 ] 78 !7 = metadata !{metadata !8, metadata !8} 79 !8 = 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] 80 !9 = metadata !{metadata !10} 81 !10 = metadata !{i32 786484, i32 0, null, metadata !"x", metadata !"x", metadata !"", metadata !5, i32 4, metadata !11, i32 0, i32 1, i32 (i32)** @x, null} ; [ DW_TAG_variable ] [x] [line 4] [def] 82 !11 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !6} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from ] 83 !12 = metadata !{i32 786449, metadata !13, i32 4, metadata !"clang version 3.5.0 ", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !14, metadata !17, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/b.cpp] [DW_LANG_C_plus_plus] 84 !13 = metadata !{metadata !"b.cpp", metadata !"/tmp/dbginfo"} 85 !14 = metadata !{metadata !15} 86 !15 = metadata !{i32 786478, metadata !13, metadata !16, metadata !"func", metadata !"func", metadata !"_Z4funci", i32 1, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32)* @_Z4funci, null, null, metadata !2, i32 1} ; [ DW_TAG_subprogram ] [line 1] [def] [func] 87 !16 = metadata !{i32 786473, metadata !13} ; [ DW_TAG_file_type ] [/tmp/dbginfo/b.cpp] 88 !17 = metadata !{metadata !18} 89 !18 = metadata !{i32 786484, i32 0, null, metadata !"y", metadata !"y", metadata !"", metadata !16, i32 4, metadata !11, i32 0, i32 1, i32 (i32)** @y, null} ; [ DW_TAG_variable ] [y] [line 4] [def] 90 !19 = metadata !{i32 2, metadata !"Dwarf Version", i32 4} 91 !20 = metadata !{i32 1, metadata !"Debug Info Version", i32 1} 92 !21 = metadata !{metadata !"clang version 3.5.0 "} 93 !22 = metadata !{i32 786689, metadata !4, metadata !"i", metadata !5, i32 16777217, metadata !8, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [i] [line 1] 94 !23 = metadata !{i32 1, i32 0, metadata !4, null} 95 !24 = metadata !{i32 2, i32 0, metadata !4, null} 96
