1; ModuleID = 'formal_parameter.c' 2target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 3target triple = "x86_64-apple-macosx10.9.0" 4; 5; From (clang -g -c -O1): 6; 7; int lookup(int* map); 8; int verify(int val); 9; void foo(int map) 10; { 11; lookup(&map); 12; if (!verify(map)) { } 13; } 14; 15; RUN: opt %s -O2 -S -o %t 16; RUN: cat %t | FileCheck --check-prefix=LOWERING %s 17; RUN: llc -filetype=obj %t -o - | llvm-dwarfdump -debug-info - | FileCheck %s 18; RUN: llc --try-experimental-debuginfo-iterators -filetype=obj %t -o - | llvm-dwarfdump -debug-info - | FileCheck %s 19; Test that we only emit only one DW_AT_formal_parameter "map" for this function. 20; rdar://problem/14874886 21; 22; CHECK: DW_TAG_formal_parameter 23; CHECK-NOT: DW_TAG 24; CHECK: DW_AT_name {{.*}}map 25; CHECK-NOT: DW_AT_name {{.*}}map 26 27; Function Attrs: nounwind ssp uwtable 28define void @foo(i32 %map) #0 !dbg !4 { 29entry: 30 %map.addr = alloca i32, align 4 31 store i32 %map, ptr %map.addr, align 4, !tbaa !15 32 call void @llvm.dbg.declare(metadata ptr %map.addr, metadata !10, metadata !DIExpression()), !dbg !14 33 %call = call i32 (ptr, ...) @lookup(ptr %map.addr) #3, !dbg !19 34 ; Ensure that all dbg intrinsics have the same scope after 35 ; LowerDbgDeclare is finished with them. 36 ; 37 ; LOWERING: #dbg_value{{.*}}, ![[LOC:[0-9]+]] 38 ; LOWERING: #dbg_value{{.*}}, ![[LOC]] 39 ; LOWERING: #dbg_value{{.*}}, ![[LOC]] 40%0 = load i32, ptr %map.addr, align 4, !dbg !20, !tbaa !15 41 %call1 = call i32 (i32, ...) @verify(i32 %0) #3, !dbg !20 42 ret void, !dbg !22 43} 44 45; LOWERING: ![[SCOPE:[0-9]+]] = distinct !DISubprogram(name: "foo", 46; LOWERING: ![[LOC]] = !DILocation(line: 0, scope: ![[SCOPE]] 47 48; Function Attrs: nounwind readnone 49declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 50 51declare i32 @lookup(...) 52 53declare i32 @verify(...) 54 55; Function Attrs: nounwind readnone 56declare void @llvm.dbg.value(metadata, metadata, metadata) #1 57 58attributes #0 = { nounwind ssp uwtable } 59attributes #1 = { nounwind readnone } 60attributes #3 = { nounwind } 61 62!llvm.dbg.cu = !{!0} 63!llvm.module.flags = !{!11, !12} 64!llvm.ident = !{!13} 65 66!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5.0 ", isOptimized: true, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2) 67!1 = !DIFile(filename: "formal_parameter.c", directory: "") 68!2 = !{} 69!4 = distinct !DISubprogram(name: "foo", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 2, file: !1, scope: !5, type: !6, retainedNodes: !9) 70!5 = !DIFile(filename: "formal_parameter.c", directory: "") 71!6 = !DISubroutineType(types: !7) 72!7 = !{null, !8} 73!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 74!9 = !{!10} 75!10 = !DILocalVariable(name: "map", line: 1, arg: 1, scope: !4, file: !5, type: !8) 76!11 = !{i32 2, !"Dwarf Version", i32 2} 77!12 = !{i32 1, !"Debug Info Version", i32 3} 78!13 = !{!"clang version 3.5.0 "} 79!14 = !DILocation(line: 1, scope: !4) 80!15 = !{!16, !16, i64 0} 81!16 = !{!"int", !17, i64 0} 82!17 = !{!"omnipotent char", !18, i64 0} 83!18 = !{!"Simple C/C++ TBAA"} 84!19 = !DILocation(line: 3, scope: !4) 85!20 = !DILocation(line: 4, scope: !21) 86!21 = distinct !DILexicalBlock(line: 4, column: 0, file: !1, scope: !4) 87!22 = !DILocation(line: 5, scope: !4) 88