shader: allow partial SDWA destinations for V_NOT_B32 (#684)

tests/ShaderRecompilerComputeTests.cpp

@@ -18065,6 +18065,29 @@ TestCase Vop1SdwaNotCapturedByte0Source() {
   return test;
 }
 
+TestCase Vop1SdwaNotPreservesHighWordDestination() {
+  using O = ShaderOpcode;
+
+  std::vector<u32> code;
+  AppendBufferLoadDword(&code, 0, 30);
+  AppendVMovLiteral(&code, 3, 0xabcd5555u);
+  code.push_back(0x7e066ef9u);
+  code.push_back(0x00061400u);
+  AppendStoreVgpr(&code, 3, 0);
+  AppendEnd(&code);
+
+  TestCase test;
+  test.name = "Vop1SdwaNotPreservesHighWordDestination";
+  test.code = std::move(code);
+  test.initial = {0x12345678u};
+  test.expected = {0xabcda987u};
+  test.opcodes = {O::BUFFER_LOAD_DWORD, O::V_MOV_B32, O::V_NOT_B32,
+                  O::BUFFER_STORE_DWORD, O::S_ENDPGM};
+  test.ir_counts = {{" = BitwiseNot32 ", 1}};
+  test.required_spirv = {"OpNot"};
+  return test;
+}
+
 TestCase Vop1SdwaMovByteDestinations() {
   using O = ShaderOpcode;
 
@@ -27176,6 +27199,7 @@ std::vector<TestCase> MakeCases() {
   AddCase(VectorFfbhI32NativeAndVop3OnGpu);
   AddCase(Vop1SdwaFfblCapturedHighWordSource);
   AddCase(Vop1SdwaNotCapturedByte0Source);
+  AddCase(Vop1SdwaNotPreservesHighWordDestination);
   AddCase(Vop1SdwaMovByteDestinations);
   AddCase(Vop2SdwaSubNcExactByte2Destination);
   AddCase(Vop2SdwaAddNcCapturedHighWordDestination);