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Implement feedback from Eli re: the purpose of lax vector conversions 

llvm-svn: 74397
This commit is contained in:
Nate Begeman 2009-06-27 22:05:55 +00:00
parent c8ca49659a
commit c8961a424d
1 changed files with 2 additions and 13 deletions
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15
clang/lib/Sema/SemaExpr.cpp
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@ -2931,19 +2931,8 @@ bool Sema::CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty) {
bool Sema::CheckExtVectorCast(SourceRange R, QualType DestTy, QualType SrcTy) { bool Sema::CheckExtVectorCast(SourceRange R, QualType DestTy, QualType SrcTy) {
assert(DestTy->isExtVectorType() && "Not an extended vector type!"); assert(DestTy->isExtVectorType() && "Not an extended vector type!");
// If SrcTy is also an ExtVectorType, the types must be identical unless // If SrcTy is a VectorType, the total size must match to explicitly cast to
// lax vector conversions is enabled. // an ExtVectorType.
if (SrcTy->isExtVectorType()) {
if (getLangOptions().LaxVectorConversions &&
Context.getTypeSize(DestTy) == Context.getTypeSize(SrcTy))
return false;
if (DestTy != SrcTy)
return Diag(R.getBegin(),diag::err_invalid_conversion_between_ext_vectors)
<< DestTy << SrcTy << R;
return false;
}
// If SrcTy is a VectorType, then only the total size must match.
if (SrcTy->isVectorType()) { if (SrcTy->isVectorType()) {
if (Context.getTypeSize(DestTy) != Context.getTypeSize(SrcTy)) if (Context.getTypeSize(DestTy) != Context.getTypeSize(SrcTy))
return Diag(R.getBegin(),diag::err_invalid_conversion_between_ext_vectors) return Diag(R.getBegin(),diag::err_invalid_conversion_between_ext_vectors)