adding test

Author: joaosaffran-zz

llvm/lib/Target/DirectX/DXIL.td

@@ -732,7 +732,6 @@ def BufferStore : DXILOp<69, bufferStore> {
 
 def UpdateCounter : DXILOp<70, bufferUpdateCounter> {
   let Doc = "increments/decrements a buffer counter";
-  let LLVMIntrinsic = int_dx_updateCounter;
   let arguments = [
     HandleTy, Int8Ty
   ];

llvm/lib/Target/DirectX/DXILOpLowering.cpp

@@ -463,6 +463,27 @@ class OpLowerer {
     });
   }
 
+ [[nodiscard]] bool lowerUpdateCounter(Function &F) {
+   IRBuilder<> &IRB = OpBuilder.getIRB();
+   
+    return replaceFunction(F, [&](CallInst *CI) -> Error {
+      IRB.SetInsertPoint(CI);
+      Value *Handle =
+          createTmpHandleCast(CI->getArgOperand(0), OpBuilder.getHandleType());
+      Value *Op1 = CI->getArgOperand(1);
+
+      std::array<Value *, 2> Args{Handle, Op1};
+
+      Expected<CallInst *> OpCall = OpBuilder.tryCreateOp(OpCode::UpdateCounter, Args, CI->getName());
+
+      if (Error E = OpCall.takeError())
+        return E;
+
+      CI->eraseFromParent();
+      return Error::success();
+    });
+ }
+
   [[nodiscard]] bool lowerTypedBufferStore(Function &F) {
     IRBuilder<> &IRB = OpBuilder.getIRB();
     Type *Int8Ty = IRB.getInt8Ty();
@@ -600,6 +621,9 @@ class OpLowerer {
       case Intrinsic::dx_typedBufferStore:
         HasErrors |= lowerTypedBufferStore(F);
         break;
+      case Intrinsic::dx_updateCounter:
+        HasErrors |= lowerUpdateCounter(F);
+      break;
       // TODO: this can be removed when
       // https://github.com/llvm/llvm-project/issues/113192 is fixed
       case Intrinsic::dx_splitdouble:

llvm/test/CodeGen/DirectX/updateCounter.ll

@@ -3,11 +3,29 @@
 
 target triple = "dxil-pc-shadermodel6.6-compute"
 
-define void @loadv4f32() {
+define void @update_counter_decrement_vector() {
   %buffer = call target("dx.TypedBuffer", <4 x float>, 0, 0, 0)
       @llvm.dx.handle.fromBinding.tdx.TypedBuffer_v4f32_0_0_0(
           i32 0, i32 0, i32 1, i32 0, i1 false)
 
   call void @llvm.dx.updateCounter(target("dx.TypedBuffer", <4 x float>, 0, 0, 0) %buffer, i8 -1)
   ret void
 }
+
+define void @update_counter_increment_vector() {
+  %buffer = call target("dx.TypedBuffer", <4 x float>, 0, 0, 0)
+      @llvm.dx.handle.fromBinding.tdx.TypedBuffer_v4f32_0_0_0(
+          i32 0, i32 0, i32 1, i32 0, i1 false)
+
+  call void @llvm.dx.updateCounter(target("dx.TypedBuffer", <4 x float>, 0, 0, 0) %buffer, i8 1)
+  ret void
+}
+
+define void @update_counter_decrement_scalar() {
+  %buffer = call target("dx.RawBuffer", i8, 0, 0)
+      @llvm.dx.handle.fromBinding.tdx.RawBuffer_i8_0_0t(
+          i32 1, i32 8, i32 1, i32 0, i1 false)
+
+  call void @llvm.dx.updateCounter(target("dx.RawBuffer", i8, 0, 0) %buffer, i8 -1)
+  ret void
+}