xtensa.c (xtensa_secondary_reload_class): Revert change from 2008-04-03.

	* config/xtensa/xtensa.c (xtensa_secondary_reload_class): Revert
	change from 2008-04-03.
	* config/xtensa/xtensa.h (IRA_COVER_CLASSES): Define.

From-SVN: r139771

gcc/ChangeLog

+2008-08-29  Bob Wilson  <bob.wilson@acm.org>
+
+	* config/xtensa/xtensa.c (xtensa_secondary_reload_class): Revert
+	change from 2008-04-03.
+	* config/xtensa/xtensa.h (IRA_COVER_CLASSES): Define.
+
 2008-08-29  Vladimir Makarov  <vmakarov@redhat.com>
 
 	PR rtl-opt/37251

gcc/config/xtensa/xtensa.c

@@ -2852,8 +2852,7 @@ xtensa_secondary_reload_class (enum reg_class rclass,
 
   if (!isoutput)
     {
-      if ((rclass == FP_REGS || GET_MODE_SIZE (mode) < UNITS_PER_WORD)
-	  && constantpool_mem_p (x))
+      if (rclass == FP_REGS && constantpool_mem_p (x))
 	return RL_REGS;
     }
 

gcc/config/xtensa/xtensa.h

@@ -479,6 +479,11 @@ enum reg_class
   { 0xffffffff, 0x0000000f }  /* all registers */ \
 }
 
+#define IRA_COVER_CLASSES						\
+{									\
+  BR_REGS, FP_REGS, ACC_REG, AR_REGS, LIM_REG_CLASSES			\
+}
+
 /* A C expression whose value is a register class containing hard
    register REGNO.  In general there is more that one such class;
    choose a class which is "minimal", meaning that no smaller class