i386.c (ix86_function_value_regno_p): Disallow DX_REG for 64-bit ms-abi.

        * config/i386/i386.c (ix86_function_value_regno_p): Disallow DX_REG
        for 64-bit ms-abi.

From-SVN: r211204

gcc/ChangeLog

+2014-06-03  Kai Tietz  <ktietz@redhat.com>
+
+	* config/i386/i386.c (ix86_function_value_regno_p): Disallow DX_REG
+	for 64-bit ms-abi.
+
 2014-06-03  Dehao Chen  <dehao@google.com>
 
 	* tree-cfg.c (gimple_merge_blocks): Only reset count when BBs are in

gcc/config/i386/i386.c

@@ -7774,8 +7774,9 @@ ix86_function_value_regno_p (const unsigned int regno)
   switch (regno)
     {
     case AX_REG:
-    case DX_REG:
       return true;
+    case DX_REG:
+      return (!TARGET_64BIT || ix86_abi != MS_ABI);
     case DI_REG:
     case SI_REG:
       return TARGET_64BIT && ix86_abi != MS_ABI;