[llvm] [DirectX] Introduce the DXILResourceAccess pass (PR #116726)

[Farzon Lotfi via llvm-commits]

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@@ -0,0 +1,196 @@
+//===- DXILResourceAccess.cpp - Resource access via load/store ------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "DXILResourceAccess.h"
+#include "DirectX.h"
+#include "llvm/Analysis/DXILResource.h"
+#include "llvm/IR/Dominators.h"
+#include "llvm/IR/IRBuilder.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/IntrinsicInst.h"
+#include "llvm/IR/Intrinsics.h"
+#include "llvm/IR/IntrinsicsDirectX.h"
+#include "llvm/InitializePasses.h"
+
+#define DEBUG_TYPE "dxil-resource-access"
+
+using namespace llvm;
+
+static void replaceTypedBufferAccess(IntrinsicInst *II,
+                                     dxil::ResourceInfo &RI) {
+  const DataLayout &DL = II->getDataLayout();
+
+  auto *HandleType = cast<TargetExtType>(II->getOperand(0)->getType());
+  assert(HandleType->getName() == "dx.TypedBuffer" &&
+         "Unexpected typed buffer type");
+  Type *ContainedType = HandleType->getTypeParameter(0);
+  Type *ScalarType = ContainedType->getScalarType();
+  uint64_t ScalarSize = DL.getTypeSizeInBits(ScalarType) / 8;
+  int NumElements = ContainedType->getNumContainedTypes();
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farzonl wrote:

I don't see `NumElements` ever get used?

https://github.com/llvm/llvm-project/pull/116726