[llvm] [LV] Use requested calling convention for vector math routines (PR #136122)

[David Sherwood via llvm-commits]

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@@ -1231,6 +1231,8 @@ void VPWidenCallRecipe::execute(VPTransformState &State) {
 
   CallInst *V = State.Builder.CreateCall(Variant, Args, OpBundles);
   setFlags(V);
+  if (CallingConv::ID ID = Variant->getCallingConv())
+    V->setCallingConv(ID);
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david-arm wrote:

Yep, good point. I've moved the assert while I'm here too. :)

https://github.com/llvm/llvm-project/pull/136122