1; RUN: llc -filetype=obj %s -o - | llvm-dwarfdump - | FileCheck %s 2; 3; Generated at -Os from: 4; ptr foo(ptr dst); 5; void start() { 6; unsigned size; 7; foo(&size); 8; if (size != 0) { // Work around a bug to preserve the dbg.value. 9; } 10; } 11 12; ModuleID = 'test1.cpp' 13target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128" 14target triple = "arm64-apple-ios" 15 16; Function Attrs: nounwind optsize 17define void @_Z5startv() #0 !dbg !4 { 18entry: 19 %size = alloca i32, align 4 20 %call = call ptr @_Z3fooPv(ptr %size) #3, !dbg !15 21 call void @llvm.dbg.value(metadata ptr %size, metadata !10, metadata !16), !dbg !17 22 23 ; The *location* of the variable should be $sp+12. This tells the debugger to 24 ; look up its value in [$sp+12]. 25 ; CHECK: .debug_info contents: 26 ; CHECK: DW_TAG_variable 27 ; CHECK-NEXT: DW_AT_location 28 ; CHECK-NEXT: DW_OP_breg31 WSP+12 29 ; CHECK-NEXT: DW_AT_name {{.*}}"size" 30 ret void, !dbg !18 31} 32 33; Function Attrs: optsize 34declare ptr @_Z3fooPv(ptr) #1 35 36; Function Attrs: nounwind readnone 37declare void @llvm.dbg.value(metadata, metadata, metadata) #2 38 39attributes #0 = { nounwind optsize } 40attributes #1 = { optsize } 41attributes #2 = { nounwind readnone } 42attributes #3 = { nounwind optsize } 43 44!llvm.dbg.cu = !{!0} 45!llvm.module.flags = !{!12, !13} 46!llvm.ident = !{!14} 47 48!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.6.0 (trunk 223149) (llvm/trunk 223115)", isOptimized: true, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2) 49!1 = !DIFile(filename: "<stdin>", directory: "") 50!2 = !{} 51!4 = distinct !DISubprogram(name: "start", linkageName: "_Z5startv", line: 2, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 3, file: !5, scope: !6, type: !7, retainedNodes: !9) 52!5 = !DIFile(filename: "test1.c", directory: "") 53!6 = !DIFile(filename: "test1.c", directory: "") 54!7 = !DISubroutineType(types: !8) 55!8 = !{null} 56!9 = !{!10} 57!10 = !DILocalVariable(name: "size", line: 4, scope: !4, file: !6, type: !11) 58!11 = !DIBasicType(tag: DW_TAG_base_type, name: "unsigned int", size: 32, align: 32, encoding: DW_ATE_unsigned) 59!12 = !{i32 2, !"Dwarf Version", i32 2} 60!13 = !{i32 2, !"Debug Info Version", i32 3} 61!14 = !{!"clang version 3.6.0 (trunk 223149) (llvm/trunk 223115)"} 62!15 = !DILocation(line: 5, column: 3, scope: !4) 63!16 = !DIExpression(DW_OP_deref) 64!17 = !DILocation(line: 4, column: 12, scope: !4) 65!18 = !DILocation(line: 8, column: 1, scope: !4) 66