1 ; RUN: llc -O3 < %s | FileCheck %s
3 ; Regression test for https://github.com/llvm/llvm-project/pull/110889#issuecomment-2393405613
4 ; Marking x64 SEH instructions as meta led to cv directives being duplicated, which caused
5 ; `cv_fpo_stackalloc` to be observed after seeing a `cv_fpo_endprologue`, which is an error.
7 ; Generated from the following code:
14 ; char n[sizeof(void *)];
16 ; int p() const { return n[0] ? *i : 1; }
23 ; To reproduce: clang -target i686-w64-mingw32 -w -c repro.cpp -O3 -g -gcodeview -emit-llvm
25 ; CHECK-LABEL: __ZNK1G1sEv:
26 ; CHECK: .cv_fpo_proc __ZNK1G1sEv 0
27 ; CHECK: .cv_fpo_stackalloc 4
28 ; CHECK: .cv_fpo_endprologue
29 ; CHECK-NOT: .cv_fpo_stackalloc
30 ; CHECK-NOT: .cv_fpo_endprologue
32 target 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"
33 target triple = "i686-w64-windows-gnu"
35 %class.b = type { i8 }
37 @q = dso_local local_unnamed_addr global i32 0, align 4, !dbg !0
39 ; Function Attrs: mustprogress noreturn
40 define 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 {
42 %agg.tmp.ensured = alloca %class.b, align 1
43 #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 !39
46 %tobool.not.i = icmp eq i8 %0, 0, !dbg !38
47 br i1 %tobool.not.i, label %_ZNK1G1pEv.exit, label %cond.true.i, !dbg !38
49 cond.true.i: ; preds = %entry
50 %i.i = getelementptr inbounds nuw i8, ptr %this, i32 4, !dbg !38
51 %1 = load ptr, ptr %i.i, align 4, !dbg !38, !tbaa !42
52 %2 = load i32, ptr %1, align 4, !dbg !38, !tbaa !45
53 br label %_ZNK1G1pEv.exit, !dbg !38
55 _ZNK1G1pEv.exit: ; preds = %entry, %cond.true.i
56 %cond.i = phi i32 [ %2, %cond.true.i ], [ 1, %entry ], !dbg !38
57 store i32 %cond.i, ptr @q, align 4, !dbg !47, !tbaa !45
58 call x86_thiscallcc void @_ZN1bC1Ev(ptr noundef nonnull align 1 dereferenceable(1) %agg.tmp.ensured), !dbg !48
62 declare dso_local x86_thiscallcc void @_ZN1bC1Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #1
64 attributes #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" }
65 attributes #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" }
68 !llvm.module.flags = !{!6, !7, !8, !9, !10, !11}
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")
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)
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)
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)
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)
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)