[llvm] [DirectX] Add support for typedBufferLoad and Store for RWBuffer<double2> and RWBuffer<double> (PR #139996)

[Justin Bogner via llvm-commits]

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@@ -532,6 +541,80 @@ static Value *expandRadiansIntrinsic(CallInst *Orig) {
   return Builder.CreateFMul(X, PiOver180);
 }
 
+static void expandTypedBufferLoadIntrinsic(CallInst *Orig) {
+  IRBuilder<> Builder(Orig);
+
+  unsigned ExtractNum =
+      Orig->getType()->getStructElementType(0)->isVectorTy() ? 4 : 2;
+  Type *Ty = VectorType::get(Builder.getInt32Ty(), ExtractNum, false);
+
+  Type *LoadType = StructType::get(Ty, Builder.getInt1Ty());
+  auto *X =
+      Builder.CreateIntrinsic(LoadType, Intrinsic::dx_resource_load_typedbuffer,
+                              {Orig->getOperand(0), Orig->getOperand(1)});
+
+  // create new extract value
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bogner wrote:

This comment just repeats what the next line does. Maybe something like "Extract the buffer load's result" would be more helpful?

https://github.com/llvm/llvm-project/pull/139996