MIPS: Do not reload unallocated FP_REGS pseudos via GR_REGS

gcc/

	* config/mips/mips.c (mips_secondary_reload_class): Handle
	regno < 0 case.

From-SVN: r215120

gcc/ChangeLog

+2014-09-10  Matthew Fortune  <matthew.fortune@imgtec.com>
+
+	* config/mips/mips.c (mips_secondary_reload_class): Handle
+	regno < 0 case.
+
 2014-09-10  Robert Suchanek   <robert.suchanek@imgtec.com>
 
 	* lra-lives.c (process_bb_lives): Replace assignment with bitwise OR

gcc/config/mips/mips.c

@@ -12143,8 +12143,9 @@ mips_secondary_reload_class (enum reg_class rclass,
 
   if (reg_class_subset_p (rclass, FP_REGS))
     {
-      if (MEM_P (x)
-	  && (GET_MODE_SIZE (mode) == 4 || GET_MODE_SIZE (mode) == 8))
+      if (regno < 0
+	  || (MEM_P (x)
+	      && (GET_MODE_SIZE (mode) == 4 || GET_MODE_SIZE (mode) == 8)))
 	/* In this case we can use lwc1, swc1, ldc1 or sdc1.  We'll use
 	   pairs of lwc1s and swc1s if ldc1 and sdc1 are not supported.  */
 	return NO_REGS;