[clang] [llvm] [SPIRV][HLSL] Add DXC compatibility option for extension (PR #151554)

[Chris B via llvm-commits]

================
@@ -173,24 +173,84 @@ bool isLegalValidatorVersion(StringRef ValVersionStr, const Driver &D) {
   return true;
 }
 
-std::string getSpirvExtArg(ArrayRef<std::string> SpvExtensionArgs) {
+void getSpirvExtOperand(llvm::StringRef SpvExtensionArg, raw_ostream &out) {
----------------
llvm-beanz wrote:

```suggestion
void getSpirvExtOperand(StringRef SpvExtensionArg, raw_ostream &out) {
```

https://github.com/llvm/llvm-project/pull/151554