[clang] [Driver] Restrict Ofast deprecation help message to Clang (PR #101682)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Kiran Chandramohan (kiranchandramohan)

<details>
<summary>Changes</summary>

The discussion about this in Flang (https://discourse.llvm.org/t/rfc-deprecate-ofast-in-flang/80243) has not concluded hence restricting the deprecation only to Clang.


---
Full diff: https://github.com/llvm/llvm-project/pull/101682.diff


1 Files Affected:

- (modified) clang/include/clang/Driver/Options.td (+3-2) 


``````````diff
diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index f690467bb82cd..d13bc51811c3c 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -932,8 +932,9 @@ def O_flag : Flag<["-"], "O">, Visibility<[ClangOption, CC1Option, FC1Option]>,
   Alias<O>, AliasArgs<["1"]>;
 def Ofast : Joined<["-"], "Ofast">, Group<O_Group>,
   Visibility<[ClangOption, CC1Option, FlangOption]>,
-  HelpText<"Deprecated; use '-O3 -ffast-math' for the same behavior,"
-  " or '-O3' to enable only conforming optimizations">;
+  HelpTextForVariants<[ClangOption,CC1Option],
+                      "Deprecated; use '-O3 -ffast-math' for the same behavior,"
+                      " or '-O3' to enable only conforming optimizations">;
 def P : Flag<["-"], "P">,
   Visibility<[ClangOption, CC1Option, FlangOption, FC1Option]>,
   Group<Preprocessor_Group>,

``````````

</details>


https://github.com/llvm/llvm-project/pull/101682