1 files changed, 1 insertions, 5 deletions
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index bc003facba0..20dbaaddb0c 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -2705,14 +2705,10 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
   // preprocessed inputs and configure concludes that -fPIC is not supported.
   Args.ClaimAllArgs(options::OPT_D);
 
-  // Manually translate -O to -O2 and -O4 to -O3; let clang reject
-  // others.
+  // Manually translate -O4 to -O3; let clang reject others.
   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
     if (A->getOption().matches(options::OPT_O4))
       CmdArgs.push_back("-O3");
-    else if (A->getOption().matches(options::OPT_O) &&
-             A->getValue()[0] == '\0')
-      CmdArgs.push_back("-O2");
     else
       A->render(Args, CmdArgs);
   }