1 ; RUN: llc -filetype=obj %s -o - | llvm-dwarfdump - | FileCheck %s 2 ; 3 ; Generated at -Os from: 4 ; void *foo(void *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' 13 target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128" 14 target triple = "arm64-apple-ios" 15 16 ; Function Attrs: nounwind optsize 17 define void @_Z5startv() #0 !dbg !4 { 18 entry: 19 %size = alloca i32, align 4 20 %0 = bitcast i32* %size to i8*, !dbg !15 21 %call = call i8* @_Z3fooPv(i8* %0) #3, !dbg !15 22 call void @llvm.dbg.value(metadata i32* %size, metadata !10, metadata !16), !dbg !17 23 24 ; The *location* of the variable should be $sp+12. This tells the debugger to 25 ; look up its value in [$sp+12]. 26 ; CHECK: .debug_info contents: 27 ; CHECK: DW_TAG_variable 28 ; CHECK-NEXT: DW_AT_location 29 ; CHECK-NEXT: DW_OP_breg31 WSP+12 30 ; CHECK-NEXT: DW_AT_name {{.*}}"size" 31 ret void, !dbg !18 32 } 33 34 ; Function Attrs: optsize 35 declare i8* @_Z3fooPv(i8*) #1 36 37 ; Function Attrs: nounwind readnone 38 declare void @llvm.dbg.value(metadata, metadata, metadata) #2 39 40 attributes #0 = { nounwind optsize } 41 attributes #1 = { optsize } 42 attributes #2 = { nounwind readnone } 43 attributes #3 = { nounwind optsize } 44 45 !llvm.dbg.cu = !{!0} 46 !llvm.module.flags = !{!12, !13} 47 !llvm.ident = !{!14} 48 49 !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) 50 !1 = !DIFile(filename: "<stdin>", directory: "") 51 !2 = !{} 52 !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) 53 !5 = !DIFile(filename: "test1.c", directory: "") 54 !6 = !DIFile(filename: "test1.c", directory: "") 55 !7 = !DISubroutineType(types: !8) 56 !8 = !{null} 57 !9 = !{!10} 58 !10 = !DILocalVariable(name: "size", line: 4, scope: !4, file: !6, type: !11) 59 !11 = !DIBasicType(tag: DW_TAG_base_type, name: "unsigned int", size: 32, align: 32, encoding: DW_ATE_unsigned) 60 !12 = !{i32 2, !"Dwarf Version", i32 2} 61 !13 = !{i32 2, !"Debug Info Version", i32 3} 62 !14 = !{!"clang version 3.6.0 (trunk 223149) (llvm/trunk 223115)"} 63 !15 = !DILocation(line: 5, column: 3, scope: !4) 64 !16 = !DIExpression(DW_OP_deref) 65 !17 = !DILocation(line: 4, column: 12, scope: !4) 66 !18 = !DILocation(line: 8, column: 1, scope: !4) 67
