xref: /llvm-project/llvm/test/CodeGen/X86/no-dup-cv-directive.ll (revision 6e1a7ac53163c335868d5773b1b35b55828f329c) 
1; RUN: llc -O3 < %s | FileCheck %s
2
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.
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-llvm
24
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
31
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 !0
38
39; Function Attrs: mustprogress noreturn
40define 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 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
48
49cond.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
54
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
59  unreachable, !dbg !48
60}
61
62declare dso_local x86_thiscallcc void @_ZN1bC1Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #1
63
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