1# RUN: llc -start-after=machineverifier -O0 %s -filetype=obj -o - | llvm-dwarfdump - | FileCheck %s 2 3# CHECK: DW_TAG_variable 4# CHECK-NEXT: DW_AT_location (DW_OP_GNU_entry_value(DW_OP_reg22 W22)) 5# CHECK-NEXT: DW_AT_name ("a") 6# CHECK: DW_TAG_variable 7# CHECK-NEXT: DW_AT_location 8# CHECK-SAME: DW_OP_GNU_entry_value(DW_OP_reg22 W22), DW_OP_piece 0x8, 9# CHECK-SAME: DW_OP_GNU_entry_value(DW_OP_reg22 W22), DW_OP_plus_uconst 0x2a, DW_OP_piece 0x8) 10# CHECK-NEXT: DW_AT_name ("fragmented_var") 11# CHECK: DW_TAG_variable 12# CHECK-NEXT: DW_AT_location (DW_OP_piece 0x8, DW_OP_GNU_entry_value(DW_OP_reg22 W22), DW_OP_piece 0x8) 13# CHECK-NEXT: DW_AT_name ("multi_type_fragmented_var") 14 15 16--- | 17 target triple = "aarch64--" 18 define void @foo(ptr %unused_arg, ptr swiftasync %async_arg) !dbg !4 { 19 %storage = alloca i64 20 call void @llvm.dbg.declare(metadata ptr %async_arg, metadata !10, metadata !DIExpression(DW_OP_LLVM_entry_value, 1)), !dbg !12 21 ; A two fragment variable. 22 ; Fragments intentionally out of order to ensure the code can handle this. 23 call void @llvm.dbg.declare(metadata ptr %async_arg, metadata !10, metadata !DIExpression(DW_OP_LLVM_entry_value, 1, DW_OP_plus_uconst, 42, DW_OP_LLVM_fragment, 64, 64)), !dbg !12 24 call void @llvm.dbg.declare(metadata ptr %async_arg, metadata !11, metadata !DIExpression(DW_OP_LLVM_entry_value, 1, DW_OP_LLVM_fragment, 0, 64)), !dbg !12 25 ; A fragmented variable mixing entry values and stack slot locations. 26 call void @llvm.dbg.declare(metadata ptr %async_arg, metadata !13, metadata !DIExpression(DW_OP_LLVM_entry_value, 1, DW_OP_LLVM_fragment, 64, 64)), !dbg !12 27 call void @llvm.dbg.declare(metadata ptr %storage, metadata !13, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 64)), !dbg !12 28 ret void, !dbg !12 29 } 30 declare void @llvm.dbg.declare(metadata, metadata, metadata) 31 declare void @consume(ptr) 32 !llvm.dbg.cu = !{!0} 33 !llvm.module.flags = !{!2, !3} 34 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug) 35 !1 = !DIFile(filename: "x.c", directory: "/") 36 !2 = !{i32 2, !"Dwarf Version", i32 4} 37 !3 = !{i32 2, !"Debug Info Version", i32 3} 38 !4 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 1, type: !5, scopeLine: 1, spFlags: DISPFlagDefinition, unit: !0) 39 !5 = !DISubroutineType(types: !6) 40 !6 = !{null, !7, !7, !7} 41 !7 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 128) 42 !9 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char) 43 !10 = !DILocalVariable(name: "a", scope: !4, file: !1, line: 1, type: !7) 44 !11 = !DILocalVariable(name: "fragmented_var", scope: !4, file: !1, line: 1, type: !7) 45 !12 = !DILocation(line: 1, column: 37, scope: !4) 46 !13 = !DILocalVariable(name: "multi_type_fragmented_var", scope: !4, file: !1, line: 1, type: !7) 47... 48--- 49name: foo 50liveins: 51 - { reg: '$x0', virtual-reg: '' } 52 - { reg: '$x22', virtual-reg: '' } 53stack: 54 - { id: 0, name: '', type: spill-slot, offset: -16, size: 8, alignment: 16, 55 stack-id: default, callee-saved-register: '$lr', callee-saved-restored: true } 56 - { id: 1, name: '', type: default, offset: 0, size: 1, alignment: 8, 57 stack-id: default, callee-saved-register: '', callee-saved-restored: true, 58 debug-info-variable: '!13', debug-info-expression: '!DIExpression(DW_OP_LLVM_fragment, 0, 64)', 59 debug-info-location: '!12' } 60 61entry_values: 62 - { entry-value-register: '$x22', debug-info-variable: '!10', debug-info-expression: '!DIExpression(DW_OP_LLVM_entry_value, 1, DW_OP_deref)', 63 debug-info-location: '!12' } 64 - { entry-value-register: '$x22', debug-info-variable: '!11', debug-info-expression: '!DIExpression(DW_OP_LLVM_entry_value, 1, DW_OP_plus_uconst, 42, DW_OP_deref, DW_OP_LLVM_fragment, 64, 64)', 65 debug-info-location: '!12' } 66 - { entry-value-register: '$x22', debug-info-variable: '!11', debug-info-expression: '!DIExpression(DW_OP_LLVM_entry_value, 1, DW_OP_deref, DW_OP_LLVM_fragment, 0, 64)', 67 debug-info-location: '!12' } 68 - { entry-value-register: '$x22', debug-info-variable: '!13', debug-info-expression: '!DIExpression(DW_OP_LLVM_entry_value, 1, DW_OP_deref, DW_OP_LLVM_fragment, 64, 64)', 69 debug-info-location: '!12' } 70body: | 71 bb.0 (%ir-block.0): 72 liveins: $x0, $x22, $lr 73 RET undef $lr, debug-location !12 74... 75