[clang] [Headers][X86] VisitCallExpr constexpr immediate shifts (#154293) (PR #155542)

[Simon Pilgrim via cfe-commits]

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@@ -2565,10 +2565,38 @@ static bool interp__builtin_elementwise_int_binop(
     return true;
   }
 
+  const auto *VT = Call->getArg(0)->getType()->castAs<VectorType>();
+  assert(VT->getElementType()->isIntegralOrEnumerationType());
+  PrimType ElemT = *S.getContext().classify(VT->getElementType());
+  unsigned NumElems = VT->getNumElements();
+
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RKSimon wrote:

Add `bool DestUnsigned = Call->getType()->isUnsignedIntegerOrEnumerationType();` here and pull out of the code below

https://github.com/llvm/llvm-project/pull/155542