Frontend: Define __EXCEPTIONS if -fexceptions is passed

GCC defines __EXCEPTIONS, regardless of language mode, if -fexceptions
is passed.  We should do the same.

This fixes PR21358.

llvm-svn: 220714

diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
index 802b2a9..476e214 100644 (file)
--- a/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -550,7 +550,7 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
     Builder.defineMacro("__BLOCKS__");
   }
 
-  if (!LangOpts.MSVCCompat && LangOpts.CXXExceptions)
+  if (!LangOpts.MSVCCompat && LangOpts.Exceptions)
     Builder.defineMacro("__EXCEPTIONS");
   if (!LangOpts.MSVCCompat && LangOpts.RTTI)
     Builder.defineMacro("__GXX_RTTI");

diff --git a/clang/test/Frontend/exceptions.c b/clang/test/Frontend/exceptions.c
index 4bbaaa3..981b5b9 100644 (file)
--- a/clang/test/Frontend/exceptions.c
+++ b/clang/test/Frontend/exceptions.c
@@ -1,6 +1,9 @@
-// RUN: %clang_cc1 -fms-compatibility -fexceptions -fcxx-exceptions -verify %s
+// RUN: %clang_cc1 -fms-compatibility -fexceptions -fcxx-exceptions -DMS_MODE -verify %s
 // expected-no-diagnostics
 
-#if defined(__EXCEPTIONS)
+// RUN: %clang_cc1 -fms-compatibility -fexceptions -verify %s
+// expected-no-diagnostics
+
+#if defined(MS_MODE) && defined(__EXCEPTIONS)
 #error __EXCEPTIONS should not be defined.
 #endif

diff --git a/clang/test/Preprocessor/predefined-exceptions.m b/clang/test/Preprocessor/predefined-exceptions.m
index c13f429..0791075 100644 (file)
--- a/clang/test/Preprocessor/predefined-exceptions.m
+++ b/clang/test/Preprocessor/predefined-exceptions.m
@@ -1,6 +1,6 @@
 // RUN: %clang_cc1 -x objective-c -fobjc-exceptions -fexceptions -E -dM %s | FileCheck -check-prefix=CHECK-OBJC-NOCXX %s 
 // CHECK-OBJC-NOCXX: #define OBJC_ZEROCOST_EXCEPTIONS 1
-// CHECK-OBJC-NOCXX-NOT: #define __EXCEPTIONS 1
+// CHECK-OBJC-NOCXX: #define __EXCEPTIONS 1
 
 // RUN: %clang_cc1 -x objective-c++ -fobjc-exceptions -fexceptions -fcxx-exceptions -E -dM %s | FileCheck -check-prefix=CHECK-OBJC-CXX %s 
 // CHECK-OBJC-CXX: #define OBJC_ZEROCOST_EXCEPTIONS 1