| ; 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 !{!"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 = !{!"0x11\004\00clang version 3.5.0 \000\00\000\00\001", !1, !2, !2, !3, !9, !2} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/a.cpp] [DW_LANG_C_plus_plus] |
| !1 = !{!"a.cpp", !"/tmp/dbginfo"} |
| !2 = !{} |
| !3 = !{!4} |
| !4 = !{!"0x2e\00func\00func\00_Z4funci\001\000\001\000\006\00256\000\001", !1, !5, !6, null, i32 (i32)* @_Z4funci, null, null, !2} ; [ DW_TAG_subprogram ] [line 1] [def] [func] |
| !5 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [/tmp/dbginfo/a.cpp] |
| !6 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !7, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ] |
| !7 = !{!8, !8} |
| !8 = !{!"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 = !{!10} |
| !10 = !{!"0x34\00x\00x\00\004\000\001", null, !5, !11, i32 (i32)** @x, null} ; [ DW_TAG_variable ] [x] [line 4] [def] |
| !11 = !{!"0xf\00\000\0064\0064\000\000", null, null, !6} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from ] |
| !12 = !{!"0x11\004\00clang version 3.5.0 \000\00\000\00\001", !13, !2, !2, !14, !17, !2} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/b.cpp] [DW_LANG_C_plus_plus] |
| !13 = !{!"b.cpp", !"/tmp/dbginfo"} |
| !14 = !{!15} |
| !15 = !{!"0x2e\00func\00func\00_Z4funci\001\000\001\000\006\00256\000\001", !13, !16, !6, null, i32 (i32)* @_Z4funci, null, null, !2} ; [ DW_TAG_subprogram ] [line 1] [def] [func] |
| !16 = !{!"0x29", !13} ; [ DW_TAG_file_type ] [/tmp/dbginfo/b.cpp] |
| !17 = !{!18} |
| !18 = !{!"0x34\00y\00y\00\004\000\001", null, !16, !11, i32 (i32)** @y, null} ; [ DW_TAG_variable ] [y] [line 4] [def] |
| !19 = !{i32 2, !"Dwarf Version", i32 4} |
| !20 = !{i32 1, !"Debug Info Version", i32 2} |
| !21 = !{!"clang version 3.5.0 "} |
| !22 = !{!"0x101\00i\0016777217\000", !4, !5, !8} ; [ DW_TAG_arg_variable ] [i] [line 1] |
| !23 = !MDLocation(line: 1, scope: !4) |
| !24 = !MDLocation(line: 2, scope: !4) |