recog.c (scratch_operand): Do not simply allow all hard registers: only allow…

recog.c (scratch_operand): Do not simply allow all hard registers: only allow those that are allocatable.

2014-09-19  Segher Boessenkool  <segher@kernel.crashing.org>

	* recog.c (scratch_operand): Do not simply allow all hard registers:
	only allow those that are allocatable.

From-SVN: r215399

gcc/ChangeLog

+2014-09-19  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	* recog.c (scratch_operand): Do not simply allow all hard registers:
+	only allow those that are allocatable.
+
 2014-09-19  Felix Yang  <felix.yang@huawei.com>
 
 	* cfgrtl.c ira.c ira-color.c ira-conflicts ira-lives.c: Update

gcc/recog.c

@@ -1143,7 +1143,9 @@ scratch_operand (rtx op, enum machine_mode mode)
 
   return (GET_CODE (op) == SCRATCH
 	  || (REG_P (op)
-	      && (lra_in_progress || REGNO (op) < FIRST_PSEUDO_REGISTER)));
+	      && (lra_in_progress
+		  || (REGNO (op) < FIRST_PSEUDO_REGISTER
+		      && REGNO_REG_CLASS (REGNO (op)) != NO_REGS))));
 }
 
 /* Return 1 if OP is a valid immediate operand for mode MODE.