[clang] [llvm] [HLSL] [DXIL] Implement the `AddUint64` HLSL function and the `UAddc` DXIL op (PR #125319)

[Deric Cheung via cfe-commits]

================
@@ -359,18 +359,21 @@ class OpLowerer {
     return lowerToBindAndAnnotateHandle(F);
   }
 
-  Error replaceSplitDoubleCallUsages(CallInst *Intrin, CallInst *Op) {
+  Error replaceExtractElementTypeOfCallUsages(CallInst *Intrin, CallInst *Op) {
     for (Use &U : make_early_inc_range(Intrin->uses())) {
       if (auto *EVI = dyn_cast<ExtractValueInst>(U.getUser())) {
 
         if (EVI->getNumIndices() != 1)
-          return createStringError(std::errc::invalid_argument,
-                                   "Splitdouble has only 2 elements");
+          return createStringError(
----------------
Icohedron wrote:

I can replace the error (that checks the number of indicies = 1) with an 
assert, but since I changed the function name to be more generic, I don't think 
it should even be present.

https://github.com/llvm/llvm-project/pull/125319
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