90 lines
4.1 KiB
LLVM
90 lines
4.1 KiB
LLVM
; RUN: llc < %s | FileCheck %s
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; Make sure we insert DW_OP_deref when spilling indirect DBG_VALUE instructions.
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; In this example, 'nt' is passed by address because it is not trivially
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; copyable. When we spill the physical argument register at the barrier, we need
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; to insert DW_OP_deref.
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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 NonTrivial {
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; NonTrivial();
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; ~NonTrivial();
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; int i;
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; };
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; int foo(NonTrivial nt) {
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; FORCE_SPILL();
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; return nt.i;
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; }
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; CHECK-LABEL: _Z3foo10NonTrivial:
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; CHECK: #DEBUG_VALUE: foo:nt <- [$rdi+0]
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; CHECK: movq %rdi, -8(%rsp) # 8-byte Spill
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; CHECK: #DEBUG_VALUE: foo:nt <- [DW_OP_constu 8, DW_OP_minus, DW_OP_deref] [$rsp+0]
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; CHECK: #APP
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; CHECK: #NO_APP
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; CHECK: movq -8(%rsp), %rax # 8-byte Reload
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; CHECK: movl (%rax), %eax
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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.NonTrivial = type { i32 }
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; Function Attrs: nounwind uwtable
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define i32 @_Z3foo10NonTrivial(%struct.NonTrivial* nocapture readonly %nt) local_unnamed_addr #0 !dbg !7 {
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entry:
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tail call void @llvm.dbg.declare(metadata %struct.NonTrivial* %nt, metadata !20, metadata !DIExpression()), !dbg !21
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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
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%i = getelementptr inbounds %struct.NonTrivial, %struct.NonTrivial* %nt, i64 0, i32 0, !dbg !24
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%0 = load i32, i32* %i, align 4, !dbg !24, !tbaa !25
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ret i32 %0, !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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attributes #0 = { nounwind uwtable }
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attributes #1 = { nounwind readnone speculatable }
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attributes #2 = { 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: "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)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10, !11}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "NonTrivial", file: !1, line: 5, size: 32, elements: !12, identifier: "_ZTS10NonTrivial")
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!12 = !{!13, !14, !18}
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!13 = !DIDerivedType(tag: DW_TAG_member, name: "i", scope: !11, file: !1, line: 8, baseType: !10, size: 32)
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!14 = !DISubprogram(name: "NonTrivial", scope: !11, file: !1, line: 6, type: !15, isLocal: false, isDefinition: false, scopeLine: 6, 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: !11, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
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!18 = !DISubprogram(name: "~NonTrivial", scope: !11, file: !1, line: 7, type: !15, isLocal: false, isDefinition: false, scopeLine: 7, flags: DIFlagPrototyped, isOptimized: true)
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!19 = !{!20}
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!20 = !DILocalVariable(name: "nt", arg: 1, scope: !7, file: !1, line: 10, type: !11)
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!21 = !DILocation(line: 10, column: 20, scope: !7)
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!22 = !DILocation(line: 11, column: 3, scope: !7)
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!23 = !{i32 -2147471481}
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!24 = !DILocation(line: 12, column: 13, scope: !7)
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!25 = !{!26, !27, i64 0}
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!26 = !{!"_ZTS10NonTrivial", !27, i64 0}
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!27 = !{!"int", !28, i64 0}
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!28 = !{!"omnipotent char", !29, i64 0}
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!29 = !{!"Simple C++ TBAA"}
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!30 = !DILocation(line: 12, column: 3, scope: !7)
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