; REQUIRES: object-emission ; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s ; Testing that two distinct (distinct by writing them in separate files, while ; still fulfilling C++'s ODR by having identical token sequences) functions, ; linked under LTO, get plausible debug info (and don't crash). ; Built from source: ; $ clang++ a.cpp b.cpp -g -c -emit-llvm ; $ llvm-link a.bc b.bc -o ab.bc ; This change is intended to tickle a case where the subprogram MDNode ; associated with the llvm::Function will differ from the subprogram ; referenced by the DbgLocs in the function. ; $ sed -ie "s/!12, !0/!0, !12/" ab.ll ; $ cat a.cpp ; inline int func(int i) { ; return i * 2; ; } ; int (*x)(int) = &func; ; $ cat b.cpp ; inline int func(int i) { ; return i * 2; ; } ; int (*y)(int) = &func; ; CHECK: DW_TAG_compile_unit ; CHECK: DW_TAG_subprogram ; CHECK-NOT: DW_TAG ; CHECK: DW_AT_name {{.*}} "func" ; CHECK: DW_TAG_compile_unit ; FIXME: Maybe we should drop the subprogram here - since the function was ; emitted in one CU, due to linkonce_odr uniquing. We certainly don't emit the ; subprogram here if the source location for this definition is the same (see ; test/DebugInfo/cross-cu-linkonce.ll), though it's very easy to tickle that ; into failing even without duplicating the source as has been done in this ; case (two cpp files in different directories, including the same header that ; contains an inline function - clang will produce distinct subprogram metadata ; that won't deduplicate owing to the file location information containing the ; directory of the source file even though the file name is absolute, not ; relative) ; CHECK: DW_TAG_subprogram @x = global i32 (i32)* @_Z4funci, align 8 @y = global i32 (i32)* @_Z4funci, align 8 ; Function Attrs: inlinehint nounwind uwtable define linkonce_odr i32 @_Z4funci(i32 %i) #0 { %1 = alloca i32, align 4 store i32 %i, i32* %1, align 4 call void @llvm.dbg.declare(metadata !{i32* %1}, metadata !22, metadata !{metadata !"0x102"}), !dbg !23 %2 = load i32* %1, align 4, !dbg !24 %3 = mul nsw i32 %2, 2, !dbg !24 ret i32 %3, !dbg !24 } ; Function Attrs: nounwind readnone declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 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" } attributes #1 = { nounwind readnone } !llvm.dbg.cu = !{!12, !0} !llvm.module.flags = !{!19, !20} !llvm.ident = !{!21, !21} !0 = metadata !{metadata !"0x11\004\00clang version 3.5.0 \000\00\000\00\001", metadata !1, metadata !2, metadata !2, metadata !3, metadata !9, metadata !2} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/a.cpp] [DW_LANG_C_plus_plus] !1 = metadata !{metadata !"a.cpp", metadata !"/tmp/dbginfo"} !2 = metadata !{} !3 = metadata !{metadata !4} !4 = metadata !{metadata !"0x2e\00func\00func\00_Z4funci\001\000\001\000\006\00256\000\001", metadata !1, metadata !5, metadata !6, null, i32 (i32)* @_Z4funci, null, null, metadata !2} ; [ DW_TAG_subprogram ] [line 1] [def] [func] !5 = metadata !{metadata !"0x29", metadata !1} ; [ DW_TAG_file_type ] [/tmp/dbginfo/a.cpp] !6 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !7, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ] !7 = metadata !{metadata !8, metadata !8} !8 = metadata !{metadata !"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed] !9 = metadata !{metadata !10} !10 = metadata !{metadata !"0x34\00x\00x\00\004\000\001", null, metadata !5, metadata !11, i32 (i32)** @x, null} ; [ DW_TAG_variable ] [x] [line 4] [def] !11 = metadata !{metadata !"0xf\00\000\0064\0064\000\000", null, null, metadata !6} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from ] !12 = metadata !{metadata !"0x11\004\00clang version 3.5.0 \000\00\000\00\001", metadata !13, metadata !2, metadata !2, metadata !14, metadata !17, metadata !2} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/b.cpp] [DW_LANG_C_plus_plus] !13 = metadata !{metadata !"b.cpp", metadata !"/tmp/dbginfo"} !14 = metadata !{metadata !15} !15 = metadata !{metadata !"0x2e\00func\00func\00_Z4funci\001\000\001\000\006\00256\000\001", metadata !13, metadata !16, metadata !6, null, i32 (i32)* @_Z4funci, null, null, metadata !2} ; [ DW_TAG_subprogram ] [line 1] [def] [func] !16 = metadata !{metadata !"0x29", metadata !13} ; [ DW_TAG_file_type ] [/tmp/dbginfo/b.cpp] !17 = metadata !{metadata !18} !18 = metadata !{metadata !"0x34\00y\00y\00\004\000\001", null, metadata !16, metadata !11, i32 (i32)** @y, null} ; [ DW_TAG_variable ] [y] [line 4] [def] !19 = metadata !{i32 2, metadata !"Dwarf Version", i32 4} !20 = metadata !{i32 1, metadata !"Debug Info Version", i32 2} !21 = metadata !{metadata !"clang version 3.5.0 "} !22 = metadata !{metadata !"0x101\00i\0016777217\000", metadata !4, metadata !5, metadata !8} ; [ DW_TAG_arg_variable ] [i] [line 1] !23 = metadata !{i32 1, i32 0, metadata !4, null} !24 = metadata !{i32 2, i32 0, metadata !4, null}