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[libc++abi] Fix C++ demangling for _BitInt type (#143466)

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The front-end expects _BitInt to be available for substitution; ensure DB<n> is
added to Subs in ItaniumDemangle.h. Also add a test case to libc++abi and
sync the files to llvm/include/llvm.
This commit is contained in:
Larry Meadows
2025-06-25 12:06:11 -07:00
committed by GitHub
parent c873e5f87d
commit 20f56d1409
4 changed files with 8 additions and 2 deletions
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4
libcxxabi/src/demangle/ItaniumDemangle.h
View File

@@ -4468,7 +4468,9 @@ Node *AbstractManglingParser<Derived, Alloc>::parseType() {
return nullptr;
if (!consumeIf('_'))
return nullptr;
return make<BitIntType>(Size, Signed);
// The front end expects this to be available for Substitution
Result = make<BitIntType>(Size, Signed);
break;
}
// ::= Di # char32_t
case 'i':

1
libcxxabi/test/DemangleTestCases.inc
View File

@@ -6,6 +6,7 @@
{"_Z1fDU10_", "f(unsigned _BitInt(10))"},
{"_Z1fIfEvDUstPT__", "void f<float>(unsigned _BitInt(sizeof (float*)))"},
{"_Z1fIiEvDBstPT__", "void f<int>(_BitInt(sizeof (int*)))"},
{"_Z6myfuncRDB8_S0_", "myfunc(_BitInt(8)&, _BitInt(8)&)"},
{"_Z4testI1A1BE1Cv", "C test<A, B>()"},
{"_Z4testI1A1BET0_T_S3_", "B test<A, B>(A, A)"},
{"_ZN1SgtEi", "S::operator>(int)"},

4
llvm/include/llvm/Demangle/ItaniumDemangle.h
View File

@@ -4468,7 +4468,9 @@ Node *AbstractManglingParser<Derived, Alloc>::parseType() {
return nullptr;
if (!consumeIf('_'))
return nullptr;
return make<BitIntType>(Size, Signed);
// The front end expects this to be available for Substitution
Result = make<BitIntType>(Size, Signed);
break;
}
// ::= Di # char32_t
case 'i':

1
llvm/include/llvm/Testing/Demangle/DemangleTestCases.inc
View File

@@ -6,6 +6,7 @@
{"_Z1fDU10_", "f(unsigned _BitInt(10))"},
{"_Z1fIfEvDUstPT__", "void f<float>(unsigned _BitInt(sizeof (float*)))"},
{"_Z1fIiEvDBstPT__", "void f<int>(_BitInt(sizeof (int*)))"},
{"_Z6myfuncRDB8_S0_", "myfunc(_BitInt(8)&, _BitInt(8)&)"},
{"_Z4testI1A1BE1Cv", "C test<A, B>()"},
{"_Z4testI1A1BET0_T_S3_", "B test<A, B>(A, A)"},
{"_ZN1SgtEi", "S::operator>(int)"},