[clang] [flang] [mlir] [flang] Add basic -mtune support (PR #95043)

[Alexis Perry-Holby via cfe-commits]

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@@ -58,6 +58,15 @@ def FramePointerKindAttr : LLVM_Attr<"FramePointerKind", "framePointerKind"> {
   let assemblyFormat = "`<` $framePointerKind `>`";
 }
 
+//===----------------------------------------------------------------------===//
+// TuneCPUAttr
+//===----------------------------------------------------------------------===//
+
+//def TuneCPUAttr : LLVM_Attr<"TuneCPU", "tuneCPU"> {
+  //let parameters = (ins "tuneCPU::tuneCPU":$tuneCPU);
+  //let assemblyFormat = "`<` $tuneCPU `>`";
+//}
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AlexisPerry wrote:

Thank you for catching that!  I will clean it up.

https://github.com/llvm/llvm-project/pull/95043