; REQUIRES: object-emission ; ; RUN: llc -mtriple=x86_64-unknown-linux-gnu -O0 -filetype=obj < %s > %t ; RUN: llvm-dwarfdump %t | FileCheck %s ; Test case derived from compiling the following source with clang -g: ; ; namespace pr14763 { ; struct foo { ; foo(const foo&); ; }; ; ; foo func(foo f) { ; return f; // reference 'f' for now because otherwise we hit another bug ; } ; ; void sink(void*); ; ; void func2(bool b, foo g) { ; if (b) ; sink(&g); // reference 'f' for now because otherwise we hit another bug ; } ; } ; CHECK: debug_info contents ; 0x74 is DW_OP_breg4, showing that the parameter is accessed indirectly ; (with a zero offset) from the register parameter ; CHECK: DW_AT_location{{.*}}(<0x0{{.}}> 74 00 ; CHECK-NOT: DW_TAG ; CHECK: DW_AT_name{{.*}} = "f" ; CHECK: DW_AT_location{{.*}}([[G_LOC:0x[0-9]*]]) ; CHECK-NOT: DW_TAG ; CHECK: DW_AT_name{{.*}} = "g" ; CHECK: debug_loc contents ; CHECK-NEXT: [[G_LOC]]: Beginning ; CHECK-NEXT: Ending ; CHECK-NEXT: Location description: 74 00 %"struct.pr14763::foo" = type { i8 } ; Function Attrs: uwtable define void @_ZN7pr147634funcENS_3fooE(%"struct.pr14763::foo"* noalias sret %agg.result, %"struct.pr14763::foo"* %f) #0 !dbg !4 { entry: call void @llvm.dbg.declare(metadata %"struct.pr14763::foo"* %f, metadata !22, metadata !DIExpression(DW_OP_deref)), !dbg !24 call void @_ZN7pr147633fooC1ERKS0_(%"struct.pr14763::foo"* %agg.result, %"struct.pr14763::foo"* %f), !dbg !25 ret void, !dbg !25 } ; Function Attrs: nounwind readnone declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 declare void @_ZN7pr147633fooC1ERKS0_(%"struct.pr14763::foo"*, %"struct.pr14763::foo"*) #2 ; Function Attrs: uwtable define void @_ZN7pr147635func2EbNS_3fooE(i1 zeroext %b, %"struct.pr14763::foo"* %g) #0 !dbg !17 { entry: %b.addr = alloca i8, align 1 %frombool = zext i1 %b to i8 store i8 %frombool, i8* %b.addr, align 1 call void @llvm.dbg.declare(metadata i8* %b.addr, metadata !26, metadata !DIExpression()), !dbg !27 call void @llvm.dbg.declare(metadata %"struct.pr14763::foo"* %g, metadata !28, metadata !DIExpression(DW_OP_deref)), !dbg !27 %0 = load i8, i8* %b.addr, align 1, !dbg !29 %tobool = trunc i8 %0 to i1, !dbg !29 br i1 %tobool, label %if.then, label %if.end, !dbg !29 if.then: ; preds = %entry %1 = bitcast %"struct.pr14763::foo"* %g to i8*, !dbg !31 call void @_ZN7pr147634sinkEPv(i8* %1), !dbg !31 br label %if.end, !dbg !31 if.end: ; preds = %if.then, %entry ret void, !dbg !32 } declare void @_ZN7pr147634sinkEPv(i8*) #2 attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" } attributes #1 = { nounwind readnone } attributes #2 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" } !llvm.dbg.cu = !{!0} !llvm.module.flags = !{!21, !33} !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.4 ", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2) !1 = !DIFile(filename: "pass.cpp", directory: "/tmp") !2 = !{} !3 = !{!4, !17} !4 = distinct !DISubprogram(name: "func", linkageName: "_ZN7pr147634funcENS_3fooE", line: 6, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 6, file: !1, scope: !5, type: !6, variables: !2) !5 = !DINamespace(name: "pr14763", line: 1, file: !1, scope: null) !6 = !DISubroutineType(types: !7) !7 = !{!8, !8} !8 = !DICompositeType(tag: DW_TAG_structure_type, name: "foo", line: 2, size: 8, align: 8, file: !1, scope: !5, elements: !9) !9 = !{!10} !10 = !DISubprogram(name: "foo", line: 3, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 3, file: !1, scope: !8, type: !11) !11 = !DISubroutineType(types: !12) !12 = !{null, !13, !14} !13 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !8) !14 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: !15) !15 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !8) !17 = distinct !DISubprogram(name: "func2", linkageName: "_ZN7pr147635func2EbNS_3fooE", line: 12, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 12, file: !1, scope: !5, type: !18, variables: !2) !18 = !DISubroutineType(types: !19) !19 = !{null, !20, !8} !20 = !DIBasicType(tag: DW_TAG_base_type, name: "bool", size: 8, align: 8, encoding: DW_ATE_boolean) !21 = !{i32 2, !"Dwarf Version", i32 3} !22 = !DILocalVariable(name: "f", line: 6, arg: 1, scope: !4, file: !23, type: !8) !23 = !DIFile(filename: "pass.cpp", directory: "/tmp") !24 = !DILocation(line: 6, scope: !4) !25 = !DILocation(line: 7, scope: !4) !26 = !DILocalVariable(name: "b", line: 12, arg: 1, scope: !17, file: !23, type: !20) !27 = !DILocation(line: 12, scope: !17) !28 = !DILocalVariable(name: "g", line: 12, arg: 2, scope: !17, file: !23, type: !8) !29 = !DILocation(line: 13, scope: !30) !30 = distinct !DILexicalBlock(line: 13, column: 0, file: !1, scope: !17) !31 = !DILocation(line: 14, scope: !30) !32 = !DILocation(line: 15, scope: !17) !33 = !{i32 1, !"Debug Info Version", i32 3}