1; RUN: llc -mtriple=x86_64-unknown-unknown -stop-before livedebugvalues %s -o -\ 2; RUN: -experimental-debug-variable-locations=false \ 3; RUN: | FileCheck %s --check-prefixes=CHECK,DBGVALUE 4; RUN: llc -mtriple=x86_64-unknown-unknown -stop-before livedebugvalues %s -o -\ 5; RUN: -experimental-debug-variable-locations=true \ 6; RUN: | FileCheck %s --check-prefixes=CHECK,INSTRREF 7; 8; Generated at -O1 from: 9; typedef struct { 10; unsigned long long c; 11; } S1; 12; struct S3 { 13; unsigned long long packed; 14; }; 15; struct S6 { 16; struct S0 *b; 17; }; 18; void f(struct S3 *a3) 19; { 20; struct S4 *s4 = (struct S4 *)(a3->packed + 0x1000UL); 21; struct S6 *myVar = (struct S6 *)s4; 22; struct S0 *b = myVar->b; 23; use(b); 24; } 25; 26; The debug info is attached to the ADD 4096 operation, which doesn't survive 27; instruction selection as it is folded into the load. As a result, we should 28; refer to s4 and myVar with complex expressions. 29; 30; CHECK: ![[S4:.*]] = !DILocalVariable(name: "s4", 31; CHECK: ![[MYVAR:.*]] = !DILocalVariable(name: "myVar", 32; CHECK: $rax = MOV64rm 33; INSTRREF-SAME: debug-instr-number 2, 34; INSTRREF-NEXT: DBG_INSTR_REF ![[S4]], 35; DBGVALUE-NEXT: DBG_VALUE $rax, $noreg, ![[S4]], 36; DBGVALUE-SAME: !DIExpression(DW_OP_plus_uconst, 4096, DW_OP_stack_value) 37; INSTRREF-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_plus_uconst, 4096, DW_OP_stack_value) 38; INSTRREF-SAME: dbg-instr-ref(2, 0) 39 40; INSTRREF: DBG_INSTR_REF ![[MYVAR]], 41; DBGVALUE: DBG_VALUE $rax, $noreg, ![[MYVAR]], 42; DBGVALUE-SAME: !DIExpression(DW_OP_plus_uconst, 4096, DW_OP_stack_value) 43; INSTRREF-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_plus_uconst, 4096, DW_OP_stack_value) 44; INSTRREF-SAME: dbg-instr-ref(2, 0) 45; CHECK-NEXT: $rdi = MOV64rm killed renamable $rax, 1, $noreg, 4096, $noreg, 46 47source_filename = "test.c" 48target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 49target triple = "x86_64-apple-macosx10.13.0" 50 51%struct.S3 = type { i64 } 52%struct.S4 = type opaque 53%struct.S0 = type opaque 54 55; Function Attrs: noinline nounwind ssp uwtable 56define void @f(ptr nocapture readonly %a3) local_unnamed_addr #0 !dbg !6 { 57entry: 58 tail call void @llvm.dbg.value(metadata ptr %a3, metadata !15, metadata !DIExpression()), !dbg !30 59 %0 = load i64, ptr %a3, align 8, !dbg !31 60 %add = add i64 %0, 4096, !dbg !37 61 %1 = inttoptr i64 %add to ptr, !dbg !38 62 tail call void @llvm.dbg.value(metadata ptr %1, metadata !16, metadata !DIExpression()), !dbg !39 63 tail call void @llvm.dbg.value(metadata ptr %1, metadata !17, metadata !DIExpression()), !dbg !40 64 %2 = load ptr, ptr %1, align 8, !dbg !41 65 tail call void @llvm.dbg.value(metadata ptr %2, metadata !24, metadata !DIExpression()), !dbg !45 66 %call = tail call i32 (ptr, ...) @use(ptr %2) #3, !dbg !46 67 ret void, !dbg !47 68} 69 70declare i32 @use(...) local_unnamed_addr 71 72; Function Attrs: nounwind readnone speculatable 73declare void @llvm.dbg.value(metadata, metadata, metadata) #2 74 75attributes #0 = { noinline nounwind ssp uwtable } 76attributes #2 = { nounwind readnone speculatable } 77attributes #3 = { nounwind } 78 79!llvm.dbg.cu = !{!0} 80!llvm.module.flags = !{!25, !26, !27, !28} 81!llvm.ident = !{!29} 82 83!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 (trunk 316467) (llvm/trunk 316466)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3) 84!1 = !DIFile(filename: "test.c", directory: "/") 85!2 = !{} 86!3 = !{!4, !18} 87!4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 64) 88!5 = !DICompositeType(tag: DW_TAG_structure_type, name: "S4", scope: !6, file: !1, line: 20, flags: DIFlagFwdDecl) 89!6 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 18, type: !7, isLocal: false, isDefinition: true, scopeLine: 19, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !14) 90!7 = !DISubroutineType(types: !8) 91!8 = !{null, !9} 92!9 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64) 93!10 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "S3", file: !1, line: 5, size: 64, elements: !11) 94!11 = !{!12} 95!12 = !DIDerivedType(tag: DW_TAG_member, name: "packed", scope: !10, file: !1, line: 6, baseType: !13, size: 64) 96!13 = !DIBasicType(name: "long long unsigned int", size: 64, encoding: DW_ATE_unsigned) 97!14 = !{!15, !16, !17, !24} 98!15 = !DILocalVariable(name: "a3", arg: 1, scope: !6, file: !1, line: 18, type: !9) 99!16 = !DILocalVariable(name: "s4", scope: !6, file: !1, line: 20, type: !4) 100!17 = !DILocalVariable(name: "myVar", scope: !6, file: !1, line: 21, type: !18) 101!18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !19, size: 64) 102!19 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "S6", file: !1, line: 8, size: 64, elements: !20) 103!20 = !{!21} 104!21 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !19, file: !1, line: 9, baseType: !22, size: 64) 105!22 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !23, size: 64) 106!23 = !DICompositeType(tag: DW_TAG_structure_type, name: "S0", file: !1, line: 4, flags: DIFlagFwdDecl) 107!24 = !DILocalVariable(name: "b", scope: !6, file: !1, line: 22, type: !22) 108!25 = !{i32 2, !"Dwarf Version", i32 4} 109!26 = !{i32 2, !"Debug Info Version", i32 3} 110!27 = !{i32 1, !"wchar_size", i32 4} 111!28 = !{i32 7, !"PIC Level", i32 2} 112!29 = !{!"clang version 6.0.0 (trunk 316467) (llvm/trunk 316466)"} 113!30 = !DILocation(line: 18, column: 14, scope: !6) 114!31 = !DILocation(line: 20, column: 37, scope: !6) 115!37 = !DILocation(line: 20, column: 44, scope: !6) 116!38 = !DILocation(line: 20, column: 19, scope: !6) 117!39 = !DILocation(line: 20, column: 14, scope: !6) 118!40 = !DILocation(line: 21, column: 14, scope: !6) 119!41 = !DILocation(line: 22, column: 25, scope: !6) 120!45 = !DILocation(line: 22, column: 14, scope: !6) 121!46 = !DILocation(line: 23, column: 3, scope: !6) 122!47 = !DILocation(line: 24, column: 1, scope: !6) 123