[clang] [Clang][AMDGPU] Add builtins for instrinsic `llvm.amdgcn.raw.ptr.buffer.load` (PR #99258)

[Matt Arsenault via cfe-commits]

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@@ -19177,6 +19177,42 @@ Value *CodeGenFunction::EmitAMDGPUBuiltinExpr(unsigned BuiltinID,
   case AMDGPU::BI__builtin_amdgcn_raw_buffer_store_b128:
     return emitBuiltinWithOneOverloadedType<5>(
         *this, E, Intrinsic::amdgcn_raw_ptr_buffer_store);
+  case AMDGPU::BI__builtin_amdgcn_raw_buffer_load_b8:
+  case AMDGPU::BI__builtin_amdgcn_raw_buffer_load_b16:
+  case AMDGPU::BI__builtin_amdgcn_raw_buffer_load_b32:
+  case AMDGPU::BI__builtin_amdgcn_raw_buffer_load_b64:
+  case AMDGPU::BI__builtin_amdgcn_raw_buffer_load_b96:
+  case AMDGPU::BI__builtin_amdgcn_raw_buffer_load_b128: {
+    llvm::Type *RetTy = nullptr;
+    switch (BuiltinID) {
+    case AMDGPU::BI__builtin_amdgcn_raw_buffer_load_b8:
+      RetTy = Int8Ty;
+      break;
+    case AMDGPU::BI__builtin_amdgcn_raw_buffer_load_b16:
+      RetTy = Int16Ty;
+      break;
+    case AMDGPU::BI__builtin_amdgcn_raw_buffer_load_b32:
+      RetTy = Int32Ty;
+      break;
+    case AMDGPU::BI__builtin_amdgcn_raw_buffer_load_b64:
+      RetTy = llvm::FixedVectorType::get(Int32Ty, /*NumElements=*/2);
+      break;
+    case AMDGPU::BI__builtin_amdgcn_raw_buffer_load_b96:
+      RetTy = llvm::FixedVectorType::get(Int32Ty, /*NumElements=*/3);
+      break;
+    case AMDGPU::BI__builtin_amdgcn_raw_buffer_load_b128:
+      RetTy = llvm::FixedVectorType::get(Int32Ty, /*NumElements=*/4);
+      break;
+    }
+    SmallVector<Value *, 4> Args;
+    Args.push_back(EmitScalarExpr(E->getArg(0)));
+    Args.push_back(EmitScalarExpr(E->getArg(1)));
+    Args.push_back(EmitScalarExpr(E->getArg(2)));
+    Args.push_back(EmitScalarExpr(E->getArg(3)));
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arsenm wrote:

Can do this in initializer list 

https://github.com/llvm/llvm-project/pull/99258