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112 lines
4.9 KiB
112 lines
4.9 KiB
4 months ago
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; RUN: llc < %s | FileCheck -check-prefixes=CHECK,OPT %s
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; RUN: llc -O0 < %s | FileCheck -check-prefixes=CHECK,OPTNONE %s
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; Make sure we insert DW_OP_deref when spilling indirect DBG_VALUE instructions.
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; C++ source:
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; #define FORCE_SPILL() \
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; __asm volatile("" : : : \
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; "rax", "rbx", "rcx", "rdx", "rsi", "rdi", "rbp", "r8", \
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; "r9", "r10", "r11", "r12", "r13", "r14", "r15")
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; struct string {
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; string();
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; string(int i);
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; ~string();
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; int i = 0;
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; };
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; string get_string() {
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; string result = 3;
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; FORCE_SPILL();
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; return result;
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; }
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; CHECK-LABEL: _Z10get_stringv:
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; OPT: #DEBUG_VALUE: get_string:result <- [$rdi+0]
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; OPT: movq %rdi, [[OFFS:[0-9]+]](%rsp) # 8-byte Spill
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; OPT: #DEBUG_VALUE: get_string:result <- [DW_OP_plus_uconst [[OFFS]], DW_OP_deref] [$rsp+0]
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; OPT: callq _ZN6stringC1Ei
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; OPTNONE: #DEBUG_VALUE: get_string:result <- [DW_OP_deref] [$rsp+0]
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; OPTNONE: movq %rdi, %rax
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; OPTNONE: movq %rax, [[OFFS:[0-9]+]](%rsp) # 8-byte Spill
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; OPTNONE: #DEBUG_VALUE: get_string:result <- [$rdi+0]
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; OPTNONE: callq _ZN6stringC1Ei
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; CHECK: #APP
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; CHECK: #NO_APP
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; ModuleID = 't.cpp'
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source_filename = "t.cpp"
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64--linux"
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%struct.string = type { i32 }
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; Function Attrs: uwtable
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define void @_Z10get_stringv(%struct.string* noalias sret(%struct.string) %agg.result) #0 !dbg !7 {
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entry:
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%nrvo = alloca i1, align 1
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store i1 false, i1* %nrvo, align 1, !dbg !24
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call void @llvm.dbg.declare(metadata %struct.string* %agg.result, metadata !23, metadata !DIExpression()), !dbg !25
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call void @_ZN6stringC1Ei(%struct.string* %agg.result, i32 3), !dbg !26
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call void asm sideeffect "", "~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"() #3, !dbg !27, !srcloc !28
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store i1 true, i1* %nrvo, align 1, !dbg !29
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%nrvo.val = load i1, i1* %nrvo, align 1, !dbg !30
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br i1 %nrvo.val, label %nrvo.skipdtor, label %nrvo.unused, !dbg !30
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nrvo.unused: ; preds = %entry
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call void @_ZN6stringD1Ev(%struct.string* %agg.result), !dbg !30
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br label %nrvo.skipdtor, !dbg !30
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nrvo.skipdtor: ; preds = %nrvo.unused, %entry
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ret void, !dbg !30
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}
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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declare void @_ZN6stringC1Ei(%struct.string*, i32) unnamed_addr
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declare void @_ZN6stringD1Ev(%struct.string*) unnamed_addr
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attributes #0 = { uwtable }
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attributes #1 = { nounwind readnone speculatable }
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attributes #3 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!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)
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!1 = !DIFile(filename: "t.cpp", directory: "C:\5Csrc\5Cllvm-project\5Cbuild")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"clang version 6.0.0 "}
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!7 = distinct !DISubprogram(name: "get_string", linkageName: "_Z10get_stringv", scope: !1, file: !1, line: 13, type: !8, isLocal: false, isDefinition: true, scopeLine: 13, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !22)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10}
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!10 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "string", file: !1, line: 7, size: 32, elements: !11, identifier: "_ZTS6string")
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!11 = !{!12, !14, !18, !21}
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!12 = !DIDerivedType(tag: DW_TAG_member, name: "i", scope: !10, file: !1, line: 11, baseType: !13, size: 32)
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!13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!14 = !DISubprogram(name: "string", scope: !10, file: !1, line: 8, type: !15, isLocal: false, isDefinition: false, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: true)
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!15 = !DISubroutineType(types: !16)
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!16 = !{null, !17}
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!17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
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!18 = !DISubprogram(name: "string", scope: !10, file: !1, line: 9, type: !19, isLocal: false, isDefinition: false, scopeLine: 9, flags: DIFlagPrototyped, isOptimized: true)
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!19 = !DISubroutineType(types: !20)
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!20 = !{null, !17, !13}
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!21 = !DISubprogram(name: "~string", scope: !10, file: !1, line: 10, type: !15, isLocal: false, isDefinition: false, scopeLine: 10, flags: DIFlagPrototyped, isOptimized: true)
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!22 = !{!23}
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!23 = !DILocalVariable(name: "result", scope: !7, file: !1, line: 14, type: !10)
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!24 = !DILocation(line: 14, column: 3, scope: !7)
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!25 = !DILocation(line: 14, column: 10, scope: !7)
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!26 = !DILocation(line: 14, column: 19, scope: !7)
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!27 = !DILocation(line: 15, column: 3, scope: !7)
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!28 = !{i32 -2147471175}
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!29 = !DILocation(line: 16, column: 3, scope: !7)
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!30 = !DILocation(line: 17, column: 1, scope: !7)
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