[clang] [HLSL] get inout/out ABI for array parameters working (PR #111047)

[Chris B via cfe-commits]

================
@@ -5322,6 +5324,11 @@ RValue CodeGenFunction::EmitCall(const CGFunctionInfo &CallInfo,
           IRCallArgs[FirstIRArg] = Val;
           break;
         }
+      } else if (I->getType()->isArrayParameterType()) {
+        // use the tmp created by the HLSLOutArgExpr
+        // instead of creating a new one below and copying the tmp into it.
----------------
llvm-beanz wrote:

```suggestion
        // Don't produce a temporary for ArrayParameterType arguments.
        // ArrayParameterType arguments are only created from
        // HLSL_ArrayRValue casts and HLSLOutArgExpr expressions, both
        // of which create temporaries already. This allows us to just use the
        // scalar for the decayed array pointer as the argument directly.
```

https://github.com/llvm/llvm-project/pull/111047