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

[Kiran Chandramohan via cfe-commits]

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

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.


>From e94fab5ceb88e5a6b44b66263b671aa33cb6faf0 Mon Sep 17 00:00:00 2001
From: Kiran Chandramohan <kiran.chandramohan at arm.com>
Date: Fri, 2 Aug 2024 14:59:48 +0000
Subject: [PATCH] [Driver] Restrict Ofast deprecation help message to Clang

---
 clang/include/clang/Driver/Options.td | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

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>,