Driver/Obj-C: Be compatible with GCC behavior in that -fno-exceptions *does not*

disable Obj-C exceptions.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@127836 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 19 deletions

diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index cf6a853952..45fdd8be2e 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -843,25 +843,16 @@ static void addExceptionArgs(const ArgList &Args, types::ID InputType,
   if (ExceptionsEnabled && DidHaveExplicitExceptionFlag)
     ShouldUseExceptionTables = true;
 
-  if (types::isObjC(InputType)) {
-    bool ObjCExceptionsEnabled = ExceptionsEnabled;
-
-    if (Arg *A = Args.getLastArg(options::OPT_fobjc_exceptions, 
-                                 options::OPT_fno_objc_exceptions,
-                                 options::OPT_fexceptions,
-                                 options::OPT_fno_exceptions)) {
-      if (A->getOption().matches(options::OPT_fobjc_exceptions))
-        ObjCExceptionsEnabled = true;
-      else if (A->getOption().matches(options::OPT_fno_objc_exceptions))
-        ObjCExceptionsEnabled = false;
-    }
-
-    if (ObjCExceptionsEnabled) {
-      CmdArgs.push_back("-fobjc-exceptions");
-
-      ShouldUseExceptionTables |= 
-        shouldUseExceptionTablesForObjCExceptions(Args, Triple);
-    }
+  // Obj-C exceptions are enabled by default, regardless of -fexceptions. This
+  // is not necessarily sensible, but follows GCC.
+  if (types::isObjC(InputType) &&
+      Args.hasFlag(options::OPT_fobjc_exceptions, 
+                   options::OPT_fno_objc_exceptions,
+                   true)) {
+    CmdArgs.push_back("-fobjc-exceptions");
+
+    ShouldUseExceptionTables |= 
+      shouldUseExceptionTablesForObjCExceptions(Args, Triple);
   }
 
   if (types::isCXX(InputType)) {