[clang] [HLSL] Add the DXC matrix orientation flags (PR #171550)

[Farzon Lotfi via cfe-commits]

================
@@ -3723,6 +3723,10 @@ static void RenderHLSLOptions(const ArgList &Args, ArgStringList &CmdArgs,
   if (!Args.hasArg(options::OPT_dxc_no_stdinc) &&
       !Args.hasArg(options::OPT_nostdinc))
     CmdArgs.push_back("-finclude-default-header");
+  if (Args.hasArg(options::OPT_dxc_col_major))
+    CmdArgs.push_back("-fmatrix-memory-layout=column-major");
+  if (Args.hasArg(options::OPT_dxc_row_major))
+    CmdArgs.push_back("-fmatrix-memory-layout=row-major");
----------------
farzonl wrote:

try and figure out how to replace this with
```diff
diff --git a/clang/lib/Driver/ToolChains/HLSL.cpp b/clang/lib/Driver/ToolChains/HLSL.cpp
index 5d7221b8718a..11597b168f59 100644
--- a/clang/lib/Driver/ToolChains/HLSL.cpp
+++ b/clang/lib/Driver/ToolChains/HLSL.cpp
@@ -506,7 +510,18 @@ HLSLToolChain::TranslateArgs(const DerivedArgList &Args, StringRef BoundArch,
       A->claim();
       continue;
     }
-
+    if (A->getOption().getID() == options::OPT_dxc_col_major) {
+      DAL->AddSeparateArg(nullptr, Opts.getOption(options::OPT_fmatrix_memory_layout_EQ),
+                          "column-major");
+      A->claim();
+      continue;
+    }
+    if (A->getOption().getID() == options::OPT_dxc_row_major) {
+      DAL->AddSeparateArg(nullptr, Opts.getOption(options::OPT_fmatrix_memory_layout_EQ),
+                          "row-major");
+      A->claim();
+      continue;
+    }
     DAL->append(A);
   }
```

https://github.com/llvm/llvm-project/pull/171550