| ; 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 !DIExpression()), !dbg !23 |
| %2 = load i32, 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 = !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !9, imports: !2) |
| !1 = !DIFile(filename: "a.cpp", directory: "/tmp/dbginfo") |
| !2 = !{} |
| !3 = !{!4} |
| !4 = !DISubprogram(name: "func", linkageName: "_Z4funci", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 1, file: !1, scope: !5, type: !6, function: i32 (i32)* @_Z4funci, variables: !2) |
| !5 = !DIFile(filename: "a.cpp", directory: "/tmp/dbginfo") |
| !6 = !DISubroutineType(types: !7) |
| !7 = !{!8, !8} |
| !8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) |
| !9 = !{!10} |
| !10 = !DIGlobalVariable(name: "x", line: 4, isLocal: false, isDefinition: true, scope: null, file: !5, type: !11, variable: i32 (i32)** @x) |
| !11 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !6) |
| !12 = !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: 1, file: !13, enums: !2, retainedTypes: !2, subprograms: !14, globals: !17, imports: !2) |
| !13 = !DIFile(filename: "b.cpp", directory: "/tmp/dbginfo") |
| !14 = !{!15} |
| !15 = !DISubprogram(name: "func", linkageName: "_Z4funci", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 1, file: !13, scope: !16, type: !6, function: i32 (i32)* @_Z4funci, variables: !2) |
| !16 = !DIFile(filename: "b.cpp", directory: "/tmp/dbginfo") |
| !17 = !{!18} |
| !18 = !DIGlobalVariable(name: "y", line: 4, isLocal: false, isDefinition: true, scope: null, file: !16, type: !11, variable: i32 (i32)** @y) |
| !19 = !{i32 2, !"Dwarf Version", i32 4} |
| !20 = !{i32 1, !"Debug Info Version", i32 3} |
| !21 = !{!"clang version 3.5.0 "} |
| !22 = !DILocalVariable(tag: DW_TAG_arg_variable, name: "i", line: 1, arg: 1, scope: !4, file: !5, type: !8) |
| !23 = !DILocation(line: 1, scope: !4) |
| !24 = !DILocation(line: 2, scope: !4) |