Driver/Darwin: Darwin uses -fobjc-legacy-dispatch on ARM.

llvm-svn: 95006

2 files changed, 6 insertions, 1 deletions

diff --git a/clang/lib/Driver/ToolChains.h b/clang/lib/Driver/ToolChains.h
index e683c2d4842..fbb1136199d 100644
--- a/clang/lib/Driver/ToolChains.h
+++ b/clang/lib/Driver/ToolChains.h
@@ -161,6 +161,11 @@ public:
     // Non-fragile ABI default to on for iPhoneOS and x86-64.
     return isTargetIPhoneOS() || getTriple().getArch() == llvm::Triple::x86_64;
   }
+  virtual bool IsObjCLegacyDispatchDefault() const {
+    // This is only used with the non-fragile ABI.
+    return (getTriple().getArch() == llvm::Triple::arm ||
+            getTriple().getArch() == llvm::Triple::thumb);
+  }
   virtual bool IsUnwindTablesDefault() const;
   virtual unsigned GetDefaultStackProtectorLevel() const {
     // Stack protectors default to on for 10.6 and beyond.
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 88dffa98f96..b0278b8aece 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -1031,7 +1031,7 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
       // defaults to off.
       if (Args.hasFlag(options::OPT_fobjc_legacy_dispatch,
                        options::OPT_fno_objc_legacy_dispatch,
-                       false))
+                       getToolChain().IsObjCLegacyDispatchDefault()))
         CmdArgs.push_back("-fobjc-legacy-dispatch");
     }
   }