Improve handling of vector casts in C++.
llvm-svn: 82072
diff --git a/clang/lib/Sema/SemaCXXCast.cpp b/clang/lib/Sema/SemaCXXCast.cpp
index dbd6c6f..f0ae9a1 100644
--- a/clang/lib/Sema/SemaCXXCast.cpp
+++ b/clang/lib/Sema/SemaCXXCast.cpp
@@ -956,6 +956,32 @@
return TC_Success;
}
+ bool destIsVector = DestType->isVectorType();
+ bool srcIsVector = SrcType->isVectorType();
+ if (srcIsVector || destIsVector) {
+ bool srcIsScalar = SrcType->isIntegralType() && !SrcType->isEnumeralType();
+ bool destIsScalar =
+ DestType->isIntegralType() && !DestType->isEnumeralType();
+
+ // Check if this is a cast between a vector and something else.
+ if (!(srcIsScalar && destIsVector) && !(srcIsVector && destIsScalar) &&
+ !(srcIsVector && destIsVector))
+ return TC_NotApplicable;
+
+ // If both types have the same size, we can successfully cast.
+ if (Self.Context.getTypeSize(SrcType) == Self.Context.getTypeSize(DestType))
+ return TC_Success;
+
+ if (destIsScalar)
+ msg = diag::err_bad_cxx_cast_vector_to_scalar_different_size;
+ else if (srcIsScalar)
+ msg = diag::err_bad_cxx_cast_scalar_to_vector_different_size;
+ else
+ msg = diag::err_bad_cxx_cast_vector_to_vector_different_size;
+
+ return TC_Failed;
+ }
+
bool destIsPtr = DestType->isPointerType();
bool srcIsPtr = SrcType->isPointerType();
if (!destIsPtr && !srcIsPtr) {