[clang] [clang] Restrict use of scalar types in vector builtins (PR #119423)

[Fraser Cormack via cfe-commits]

================
@@ -14585,11 +14585,18 @@ void Sema::CheckAddressOfPackedMember(Expr *rhs) {
                      _2, _3, _4));
 }
 
+static ExprResult UsualUnaryConversionsNoPromoteInt(Sema &S, Expr *E) {
+  // Don't promote integer types
+  if (QualType Ty = E->getType(); 
S.getASTContext().isPromotableIntegerType(Ty))
+    return S.DefaultFunctionArrayLvalueConversion(E);
+  return S.UsualUnaryConversions(E);
----------------
frasercrmck wrote:

I don't have strong opinions either way. I've added some CodeGen tests for 
bitfields so at least the current behaviour is tested.

https://github.com/llvm/llvm-project/pull/119423
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