[llvm-branch-commits] [DirectX] Lower `@llvm.dx.typedBufferLoad` to DXIL ops (PR #104252)

[Chris B via llvm-branch-commits]

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@@ -683,6 +686,17 @@ def CreateHandle : DXILOp<57, createHandle> {
   let stages = [Stages<DXIL1_0, [all_stages]>];
 }
 
+def BufferLoad : DXILOp<68, bufferLoad> {
+  let Doc = "reads from a TypedBuffer";
+  // Handle, Coord0, Coord1
+  let arguments = [HandleTy, Int32Ty, Int32Ty];
+  let result = OverloadTy;
+  let overloads =
+      [Overloads<DXIL1_0,
+                 [ResRetHalfTy, ResRetFloatTy, ResRetInt16Ty, ResRetInt32Ty]>];
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llvm-beanz wrote:

The 16-bit overloads were always valid in DXIL 1.0, but they didn't actually mean 16-bit types, they meant the min16{float|int|uint} types. This is one of the things that's really wonky about DXIL defining interpretations of LLVM IR that conflicted with LLVM's core definition.

I think the code here is accurate to what we need for that.

https://github.com/llvm/llvm-project/pull/104252