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1; RUN: llc < %s -experimental-debug-variable-locations=false | FileCheck %s2; RUN: llc < %s -experimental-debug-variable-locations=true | FileCheck %s3 4; Make sure we insert DW_OP_deref when spilling indirect DBG_VALUE instructions.5; In this example, 'nt' is passed by address because it is not trivially6; copyable. When we spill the physical argument register at the barrier, we need7; to insert DW_OP_deref.8 9; #define FORCE_SPILL() \10; __asm volatile("" : : : \11; "rax", "rbx", "rcx", "rdx", "rsi", "rdi", "rbp", "r8", \12; "r9", "r10", "r11", "r12", "r13", "r14", "r15")13; struct NonTrivial {14; NonTrivial();15; ~NonTrivial();16; int i;17; };18; int foo(NonTrivial nt) {19; FORCE_SPILL();20; return nt.i;21; }22 23; CHECK-LABEL: _Z3foo10NonTrivial:24; CHECK: #DEBUG_VALUE: foo:nt <- [$rdi+0]25; CHECK: movq %rdi, -8(%rsp) # 8-byte Spill26; CHECK: #DEBUG_VALUE: foo:nt <- [DW_OP_constu 8, DW_OP_minus, DW_OP_deref] [$rsp+0]27; CHECK: #APP28; CHECK: #NO_APP29; CHECK: movq -8(%rsp), %rax # 8-byte Reload30; CHECK: movl (%rax), %eax31 32; ModuleID = 't.cpp'33source_filename = "t.cpp"34target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"35target triple = "x86_64--linux"36 37%struct.NonTrivial = type { i32 }38 39; Function Attrs: nounwind uwtable40define i32 @_Z3foo10NonTrivial(ptr nocapture readonly %nt) local_unnamed_addr #0 !dbg !7 {41entry:42 tail call void @llvm.dbg.declare(metadata ptr %nt, metadata !20, metadata !DIExpression()), !dbg !2143 tail call void asm sideeffect "", "~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"() #2, !dbg !22, !srcloc !2344 %0 = load i32, ptr %nt, align 4, !dbg !24, !tbaa !2545 ret i32 %0, !dbg !3046}47 48; Function Attrs: nounwind readnone speculatable49declare void @llvm.dbg.declare(metadata, metadata, metadata) #150 51attributes #0 = { nounwind uwtable }52attributes #1 = { nounwind readnone speculatable }53attributes #2 = { nounwind }54 55!llvm.dbg.cu = !{!0}56!llvm.module.flags = !{!3, !4, !5}57!llvm.ident = !{!6}58 59!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 6.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)60!1 = !DIFile(filename: "t.cpp", directory: "C:\5Csrc\5Cllvm-project\5Cbuild")61!2 = !{}62!3 = !{i32 2, !"Dwarf Version", i32 4}63!4 = !{i32 2, !"Debug Info Version", i32 3}64!5 = !{i32 1, !"wchar_size", i32 4}65!6 = !{!"clang version 6.0.0 "}66!7 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foo10NonTrivial", scope: !1, file: !1, line: 10, type: !8, isLocal: false, isDefinition: true, scopeLine: 10, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !19)67!8 = !DISubroutineType(types: !9)68!9 = !{!10, !11}69!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)70!11 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "NonTrivial", file: !1, line: 5, size: 32, elements: !12, identifier: "_ZTS10NonTrivial")71!12 = !{!13, !14, !18}72!13 = !DIDerivedType(tag: DW_TAG_member, name: "i", scope: !11, file: !1, line: 8, baseType: !10, size: 32)73!14 = !DISubprogram(name: "NonTrivial", scope: !11, file: !1, line: 6, type: !15, isLocal: false, isDefinition: false, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true)74!15 = !DISubroutineType(types: !16)75!16 = !{null, !17}76!17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer)77!18 = !DISubprogram(name: "~NonTrivial", scope: !11, file: !1, line: 7, type: !15, isLocal: false, isDefinition: false, scopeLine: 7, flags: DIFlagPrototyped, isOptimized: true)78!19 = !{!20}79!20 = !DILocalVariable(name: "nt", arg: 1, scope: !7, file: !1, line: 10, type: !11)80!21 = !DILocation(line: 10, column: 20, scope: !7)81!22 = !DILocation(line: 11, column: 3, scope: !7)82!23 = !{i32 -2147471481}83!24 = !DILocation(line: 12, column: 13, scope: !7)84!25 = !{!26, !27, i64 0}85!26 = !{!"_ZTS10NonTrivial", !27, i64 0}86!27 = !{!"int", !28, i64 0}87!28 = !{!"omnipotent char", !29, i64 0}88!29 = !{!"Simple C++ TBAA"}89!30 = !DILocation(line: 12, column: 3, scope: !7)90