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1; RUN: llc -O3 < %s | FileCheck %s2 3; Regression test for https://github.com/llvm/llvm-project/pull/110889#issuecomment-23934056134; Marking x64 SEH instructions as meta led to cv directives being duplicated, which caused5; `cv_fpo_stackalloc` to be observed after seeing a `cv_fpo_endprologue`, which is an error.6 7; Generated from the following code:8; int q;9; class b {10; public:11; b();12; };13; struct G {14; char n[sizeof(void *)];15; int *i;16; int p() const { return n[0] ? *i : 1; }17; int s() const;18; };19; int G::s() const {20; q = p();21; b();22; }23; To reproduce: clang -target i686-w64-mingw32 -w -c repro.cpp -O3 -g -gcodeview -emit-llvm24 25; CHECK-LABEL: __ZNK1G1sEv:26; CHECK: .cv_fpo_proc __ZNK1G1sEv 027; CHECK: .cv_fpo_stackalloc 428; CHECK: .cv_fpo_endprologue29; CHECK-NOT: .cv_fpo_stackalloc30; CHECK-NOT: .cv_fpo_endprologue31 32target datalayout = "e-m:x-p:32:32-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:32-n8:16:32-a:0:32-S32"33target triple = "i686-w64-windows-gnu"34 35%class.b = type { i8 }36 37@q = dso_local local_unnamed_addr global i32 0, align 4, !dbg !038 39; Function Attrs: mustprogress noreturn40define dso_local x86_thiscallcc noundef i32 @_ZNK1G1sEv(ptr nocapture noundef nonnull readonly align 4 dereferenceable(8) %this) local_unnamed_addr #0 align 2 !dbg !13 {41entry:42 %agg.tmp.ensured = alloca %class.b, align 143 #dbg_value(ptr %this, !30, !DIExpression(), !32)44 #dbg_value(ptr %this, !33, !DIExpression(), !36)45 %0 = load i8, ptr %this, align 4, !dbg !38, !tbaa !3946 %tobool.not.i = icmp eq i8 %0, 0, !dbg !3847 br i1 %tobool.not.i, label %_ZNK1G1pEv.exit, label %cond.true.i, !dbg !3848 49cond.true.i: ; preds = %entry50 %i.i = getelementptr inbounds nuw i8, ptr %this, i32 4, !dbg !3851 %1 = load ptr, ptr %i.i, align 4, !dbg !38, !tbaa !4252 %2 = load i32, ptr %1, align 4, !dbg !38, !tbaa !4553 br label %_ZNK1G1pEv.exit, !dbg !3854 55_ZNK1G1pEv.exit: ; preds = %entry, %cond.true.i56 %cond.i = phi i32 [ %2, %cond.true.i ], [ 1, %entry ], !dbg !3857 store i32 %cond.i, ptr @q, align 4, !dbg !47, !tbaa !4558 call x86_thiscallcc void @_ZN1bC1Ev(ptr noundef nonnull align 1 dereferenceable(1) %agg.tmp.ensured), !dbg !4859 unreachable, !dbg !4860}61 62declare dso_local x86_thiscallcc void @_ZN1bC1Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #163 64attributes #0 = { mustprogress noreturn "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="pentium4" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }65attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="pentium4" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }66 67!llvm.dbg.cu = !{!2}68!llvm.module.flags = !{!6, !7, !8, !9, !10, !11}69!llvm.ident = !{!12}70 71!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())72!1 = distinct !DIGlobalVariable(name: "q", scope: !2, file: !3, line: 1, type: !5, isLocal: false, isDefinition: true)73!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !3, producer: "clang version 20.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, globals: !4, splitDebugInlining: false, nameTableKind: None)74!3 = !DIFile(filename: "repro.cpp", directory: "C:\\llvm", checksumkind: CSK_MD5, checksum: "54362b0cc0bf4b9927aafc8b00498049")75!4 = !{!0}76!5 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)77!6 = !{i32 1, !"NumRegisterParameters", i32 0}78!7 = !{i32 2, !"CodeView", i32 1}79!8 = !{i32 2, !"Debug Info Version", i32 3}80!9 = !{i32 1, !"wchar_size", i32 2}81!10 = !{i32 1, !"MaxTLSAlign", i32 65536}82!11 = !{i32 7, !"debug-info-assignment-tracking", i1 true}83!12 = !{!"clang version 20.0.0"}84!13 = distinct !DISubprogram(name: "s", linkageName: "_ZNK1G1sEv", scope: !14, file: !3, line: 12, type: !24, scopeLine: 12, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, declaration: !28, retainedNodes: !29)85!14 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "G", file: !3, line: 6, size: 64, flags: DIFlagTypePassByValue, elements: !15, identifier: "_ZTS1G")86!15 = !{!16, !21, !23, !28}87!16 = !DIDerivedType(tag: DW_TAG_member, name: "n", scope: !14, file: !3, line: 7, baseType: !17, size: 32)88!17 = !DICompositeType(tag: DW_TAG_array_type, baseType: !18, size: 32, elements: !19)89!18 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)90!19 = !{!20}91!20 = !DISubrange(count: 4)92!21 = !DIDerivedType(tag: DW_TAG_member, name: "i", scope: !14, file: !3, line: 8, baseType: !22, size: 32, offset: 32)93!22 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 32)94!23 = !DISubprogram(name: "p", linkageName: "_ZNK1G1pEv", scope: !14, file: !3, line: 9, type: !24, scopeLine: 9, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized)95!24 = !DISubroutineType(cc: DW_CC_BORLAND_thiscall, types: !25)96!25 = !{!5, !26}97!26 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !27, size: 32, flags: DIFlagArtificial | DIFlagObjectPointer)98!27 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !14)99!28 = !DISubprogram(name: "s", linkageName: "_ZNK1G1sEv", scope: !14, file: !3, line: 10, type: !24, scopeLine: 10, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized)100!29 = !{!30}101!30 = !DILocalVariable(name: "this", arg: 1, scope: !13, type: !31, flags: DIFlagArtificial | DIFlagObjectPointer)102!31 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !27, size: 32)103!32 = !DILocation(line: 0, scope: !13)104!33 = !DILocalVariable(name: "this", arg: 1, scope: !34, type: !31, flags: DIFlagArtificial | DIFlagObjectPointer)105!34 = distinct !DISubprogram(name: "p", linkageName: "_ZNK1G1pEv", scope: !14, file: !3, line: 9, type: !24, scopeLine: 9, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, declaration: !23, retainedNodes: !35)106!35 = !{!33}107!36 = !DILocation(line: 0, scope: !34, inlinedAt: !37)108!37 = distinct !DILocation(line: 13, scope: !13)109!38 = !DILocation(line: 9, scope: !34, inlinedAt: !37)110!39 = !{!40, !40, i64 0}111!40 = !{!"omnipotent char", !41, i64 0}112!41 = !{!"Simple C++ TBAA"}113!42 = !{!43, !44, i64 4}114!43 = !{!"_ZTS1G", !40, i64 0, !44, i64 4}115!44 = !{!"any pointer", !40, i64 0}116!45 = !{!46, !46, i64 0}117!46 = !{!"int", !40, i64 0}118!47 = !DILocation(line: 13, scope: !13)119!48 = !DILocation(line: 14, scope: !13)120