[clang] clang/OpenCL: set sqrt fp accuracy on call to Z4sqrt (PR #66651)

[Romaric Jodin via cfe-commits]

================
@@ -5612,6 +5612,10 @@ RValue CodeGenFunction::EmitCall(const CGFunctionInfo &CallInfo,
                               BundleList);
     EmitBlock(Cont);
   }
+  if (CI->getCalledFunction() && CI->getCalledFunction()->hasName() &&
+      CI->getCalledFunction()->getName().startswith("_Z4sqrt")) {
----------------
rjodinchr wrote:

Using a custom `ext_vector_type` in OpenCL feels like an undefined behaviour. I don't see anything about it in the specification.
Am I missing something?

https://github.com/llvm/llvm-project/pull/66651