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[clang][DebugInfo] Mark _BitInt's as reconstitutable when emitting -gsimple-template-names #168383

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Merged
merged 4 commits into from
Nov 19, 2025
+19 −12
Merged

[clang][DebugInfo] Mark _BitInt's as reconstitutable when emitting -gsimple-template-names #168383

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cce8b0d
[llvm][DebugInfo] Add support for _BitInt in DWARFTypePrinter
Michael137 Nov 17, 2025
8dd33ef
fixup! remove unit-test
Michael137 Nov 19, 2025
1fba5ac
[clang][DebugInfo] Mark _BitInt's as reconstitutable when emitting -g…
Michael137 Nov 17, 2025
7ecfafc
Merge branch 'main' into clang/bitint-simple-template-names
Michael137 Nov 19, 2025
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9 changes: 0 additions & 9 deletions clang/lib/CodeGen/CGDebugInfo.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -5869,15 +5869,6 @@ struct ReconstitutableType : public RecursiveASTVisitor<ReconstitutableType> {
Reconstitutable = false;
return false;
}
bool VisitType(Type *T) {
// _BitInt(N) isn't reconstitutable because the bit width isn't encoded in
// the DWARF, only the byte width.
if (T->isBitIntType()) {
Reconstitutable = false;
return false;
}
return true;
}
bool TraverseEnumType(EnumType *ET, bool = false) {
// Unnamed enums can't be reconstituted due to a lack of column info we
// produce in the DWARF, so we can't get Clang's full name back.
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22 changes: 19 additions & 3 deletions clang/test/DebugInfo/CXX/simple-template-names.cpp
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Expand Up @@ -114,12 +114,28 @@ void f() {

f3<t1>();
// CHECK: !DISubprogram(name: "_STN|f3|<t1>",

f1<_BitInt(3)>();
// CHECK: !DISubprogram(name: "f1<_BitInt(3)>",
// CHECK: !DISubprogram(name: "_STN|f1|<_BitInt(3)>",

f1<const unsigned _BitInt(5)>();
// CHECK: !DISubprogram(name: "f1<const unsigned _BitInt(5)>",
// CHECK: !DISubprogram(name: "_STN|f1|<const unsigned _BitInt(5)>",

f1<_BitInt(120)>();
// CHECK: !DISubprogram(name: "_STN|f1|<_BitInt(120)>",

f1<const unsigned _BitInt(120)>();
// CHECK: !DISubprogram(name: "_STN|f1|<const unsigned _BitInt(120)>",

f2<_BitInt(2), 1>();
// CHECK: !DISubprogram(name: "_STN|f2|<_BitInt(2), (_BitInt(2))1>",

f2<_BitInt(64), 12>();
// CHECK: !DISubprogram(name: "_STN|f2|<_BitInt(64), (_BitInt(64))12>",

// FIXME: make block forms reconstitutable
f2<_BitInt(65), 1>();
// CHECK: !DISubprogram(name: "f2<_BitInt(65), (_BitInt(65))1>",

// Add a parameter just so this differs from other attributed function types
// that don't mangle differently.
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