implement support for __builtin_eh_return_data_regno on x86-32 and x86-64.

This implements PR5034 and rdar://6836445.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@82614 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 1 deletions

diff --git a/include/clang/Basic/TargetInfo.h b/include/clang/Basic/TargetInfo.h
index 1f61e3fccc..8ce85cf6bb 100644
--- a/include/clang/Basic/TargetInfo.h
+++ b/include/clang/Basic/TargetInfo.h
@@ -384,10 +384,17 @@ public:
     return RegParmMax;
   }
 
-  // isTLSSupported - Whether the target supports thread-local storage
+  /// isTLSSupported - Whether the target supports thread-local storage.
   bool isTLSSupported() const {
     return TLSSupported;
   }
+  
+  /// getEHDataRegisterNumber - Return the register number that
+  /// __builtin_eh_return_regno would return with the specified argument.
+  virtual int getEHDataRegisterNumber(unsigned RegNo) const {
+    return -1; 
+  }
+  
 
 protected:
   virtual uint64_t getPointerWidthV(unsigned AddrSpace) const {