1 ; RUN: llc < %s | FileCheck %s 2 3 ; Make sure we insert DW_OP_deref when spilling indirect DBG_VALUE instructions. 4 ; In this example, 'nt' is passed by address because it is not trivially 5 ; copyable. When we spill the physical argument register at the barrier, we need 6 ; to insert DW_OP_deref. 7 8 ; #define FORCE_SPILL() \ 9 ; __asm volatile("" : : : \ 10 ; "rax", "rbx", "rcx", "rdx", "rsi", "rdi", "rbp", "r8", \ 11 ; "r9", "r10", "r11", "r12", "r13", "r14", "r15") 12 ; struct NonTrivial { 13 ; NonTrivial(); 14 ; ~NonTrivial(); 15 ; int i; 16 ; }; 17 ; int foo(NonTrivial nt) { 18 ; FORCE_SPILL(); 19 ; return nt.i; 20 ; } 21 22 ; CHECK-LABEL: _Z3foo10NonTrivial: 23 ; CHECK: #DEBUG_VALUE: foo:nt <- [$rdi+0] 24 ; CHECK: movq %rdi, -8(%rsp) # 8-byte Spill 25 ; CHECK: #DEBUG_VALUE: foo:nt <- [DW_OP_constu 8, DW_OP_minus, DW_OP_deref] [$rsp+0] 26 ; CHECK: #APP 27 ; CHECK: #NO_APP 28 ; CHECK: movq -8(%rsp), %rax # 8-byte Reload 29 ; CHECK: movl (%rax), %eax 30 31 ; ModuleID = 't.cpp' 32 source_filename = "t.cpp" 33 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 34 target triple = "x86_64--linux" 35 36 %struct.NonTrivial = type { i32 } 37 38 ; Function Attrs: nounwind uwtable 39 define i32 @_Z3foo10NonTrivial(%struct.NonTrivial* nocapture readonly %nt) local_unnamed_addr #0 !dbg !7 { 40 entry: 41 tail call void @llvm.dbg.declare(metadata %struct.NonTrivial* %nt, metadata !20, metadata !DIExpression()), !dbg !21 42 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 !23 43 %i = getelementptr inbounds %struct.NonTrivial, %struct.NonTrivial* %nt, i64 0, i32 0, !dbg !24 44 %0 = load i32, i32* %i, align 4, !dbg !24, !tbaa !25 45 ret i32 %0, !dbg !30 46 } 47 48 ; Function Attrs: nounwind readnone speculatable 49 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 50 51 attributes #0 = { nounwind uwtable } 52 attributes #1 = { nounwind readnone speculatable } 53 attributes #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
