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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 %t16; RUN: cat %t | FileCheck --check-prefix=LOWERING %s17; RUN: llc -filetype=obj %t -o - | llvm-dwarfdump -debug-info - | FileCheck %s18; Test that we only emit only one DW_AT_formal_parameter "map" for this function.19; rdar://problem/1487488620;21; CHECK: DW_TAG_formal_parameter22; CHECK-NOT: DW_TAG23; CHECK: DW_AT_name {{.*}}map24; CHECK-NOT: DW_AT_name {{.*}}map25 26; Function Attrs: nounwind ssp uwtable27define void @foo(i32 %map) #0 !dbg !4 {28entry:29 %map.addr = alloca i32, align 430 store i32 %map, ptr %map.addr, align 4, !tbaa !1531 call void @llvm.dbg.declare(metadata ptr %map.addr, metadata !10, metadata !DIExpression()), !dbg !1432 %call = call i32 (ptr, ...) @lookup(ptr %map.addr) #3, !dbg !1933 ; Ensure that all dbg intrinsics have the same scope after34 ; LowerDbgDeclare is finished with them.35 ;36 ; LOWERING: #dbg_value{{.*}}, ![[LOC:[0-9]+]]37 ; LOWERING: #dbg_value{{.*}}, ![[LOC]]38 ; LOWERING: #dbg_value{{.*}}, ![[LOC]]39%0 = load i32, ptr %map.addr, align 4, !dbg !20, !tbaa !1540 %call1 = call i32 (i32, ...) @verify(i32 %0) #3, !dbg !2041 ret void, !dbg !2242}43 44; LOWERING: ![[SCOPE:[0-9]+]] = distinct !DISubprogram(name: "foo",45; LOWERING: ![[LOC]] = !DILocation(line: 0, scope: ![[SCOPE]]46 47; Function Attrs: nounwind readnone48declare void @llvm.dbg.declare(metadata, metadata, metadata) #149 50declare i32 @lookup(...)51 52declare i32 @verify(...)53 54; Function Attrs: nounwind readnone55declare void @llvm.dbg.value(metadata, metadata, metadata) #156 57attributes #0 = { nounwind ssp uwtable }58attributes #1 = { nounwind readnone }59attributes #3 = { nounwind }60 61!llvm.dbg.cu = !{!0}62!llvm.module.flags = !{!11, !12}63!llvm.ident = !{!13}64 65!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)66!1 = !DIFile(filename: "formal_parameter.c", directory: "")67!2 = !{}68!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)69!5 = !DIFile(filename: "formal_parameter.c", directory: "")70!6 = !DISubroutineType(types: !7)71!7 = !{null, !8}72!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)73!9 = !{!10}74!10 = !DILocalVariable(name: "map", line: 1, arg: 1, scope: !4, file: !5, type: !8)75!11 = !{i32 2, !"Dwarf Version", i32 2}76!12 = !{i32 1, !"Debug Info Version", i32 3}77!13 = !{!"clang version 3.5.0 "}78!14 = !DILocation(line: 1, scope: !4)79!15 = !{!16, !16, i64 0}80!16 = !{!"int", !17, i64 0}81!17 = !{!"omnipotent char", !18, i64 0}82!18 = !{!"Simple C/C++ TBAA"}83!19 = !DILocation(line: 3, scope: !4)84!20 = !DILocation(line: 4, scope: !21)85!21 = distinct !DILexicalBlock(line: 4, column: 0, file: !1, scope: !4)86!22 = !DILocation(line: 5, scope: !4)87