[ARM]Make CLZ_DEFINED_VALUE_AT_ZERO and CTZ_DEFINED_VALUE_AT_ZERO return 2.

gcc/

	* config/arm/arm.h (CLZ_DEFINED_VALUE_AT_ZERO): Return 2.
	(CTZ_DEFINED_VALUE_AT_ZERO): Ditto.

From-SVN: r219544

gcc/ChangeLog

+2015-01-13  Renlin Li  <renlin.li@arm.com>
+
+	* config/arm/arm.h (CLZ_DEFINED_VALUE_AT_ZERO): Return 2.
+	(CTZ_DEFINED_VALUE_AT_ZERO): Ditto.
+
 2015-01-13  Martin Liska  <mliska@suse.cz>
 
 	* ipa-icf.c (sem_function::equals_private): Call new functions

gcc/config/arm/arm.h

@@ -2150,9 +2150,9 @@ extern int making_const_table;
    : reverse_condition (code))
 
 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \
-  ((VALUE) = GET_MODE_UNIT_BITSIZE (MODE))
+  ((VALUE) = GET_MODE_UNIT_BITSIZE (MODE), 2)
 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \
-  ((VALUE) = GET_MODE_UNIT_BITSIZE (MODE))
+  ((VALUE) = GET_MODE_UNIT_BITSIZE (MODE), 2)
 
 #define CC_STATUS_INIT \
   do { cfun->machine->thumb1_cc_insn = NULL_RTX; } while (0)