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[clang] Make sure EvalInfo pointer isn't null #155563

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Merged
merged 1 commit into from
Aug 27, 2025
Merged

[clang] Make sure EvalInfo pointer isn't null #155563

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10 changes: 6 additions & 4 deletions clang/lib/AST/ExprConstant.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -7975,8 +7975,9 @@ static bool checkBitCastConstexprEligibilityType(SourceLocation Loc,
// so its layout is unspecified. For now, we'll simply treat these cases
// as unsupported (this should only be possible with OpenCL bool vectors
// whose element count isn't a multiple of the byte size).
Info->FFDiag(Loc, diag::note_constexpr_bit_cast_invalid_vector)
<< QualType(VTy, 0) << EltSize << NElts << Ctx.getCharWidth();
if (Info)
Info->FFDiag(Loc, diag::note_constexpr_bit_cast_invalid_vector)
<< QualType(VTy, 0) << EltSize << NElts << Ctx.getCharWidth();
return false;
}

Expand All @@ -7985,8 +7986,9 @@ static bool checkBitCastConstexprEligibilityType(SourceLocation Loc,
// The layout for x86_fp80 vectors seems to be handled very inconsistently
// by both clang and LLVM, so for now we won't allow bit_casts involving
// it in a constexpr context.
Info->FFDiag(Loc, diag::note_constexpr_bit_cast_unsupported_type)
<< EltTy;
if (Info)
Info->FFDiag(Loc, diag::note_constexpr_bit_cast_unsupported_type)
<< EltTy;
return false;
}
}
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7 changes: 7 additions & 0 deletions clang/test/Sema/constexpr.c
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Expand Up @@ -391,3 +391,10 @@ void ghissue109095() {
_Static_assert(i == c[0]); // expected-error {{static assertion expression is not an integral constant expression}}\
// expected-note {{initializer of 'i' is not a constant expression}}
}

typedef bool __vbool2 __attribute__((ext_vector_type(2)));
typedef short v2int16_t __attribute__((ext_vector_type(2)));

bool issue155507(v2int16_t a, v2int16_t b) {
return __builtin_bit_cast(unsigned char, __builtin_convertvector(a == b, __vbool2)) == 0b11;
}