[AArch64] Fix some warnings about unused variables.

gcc/
	* config/aarch64/aarch64.c (aarch64_simd_attr_length_move):
	Remove unused variables.
	(aarch64_split_compare_and_swap): Likewise.

From-SVN: r194588

gcc/ChangeLog

+2012-12-18  James Greenhalgh  <james.greenhalgh@arm.com>
+
+	* config/aarch64/aarch64.c (aarch64_simd_attr_length_move):
+	Remove unused variables.
+	(aarch64_split_compare_and_swap): Likewise.
+
 2012-12-18  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
 	* config/arm/driver-arm.c (arm_cpu_table):

gcc/config/aarch64/aarch64.c

@@ -6382,8 +6382,6 @@ aarch64_simd_disambiguate_copy (rtx *operands, rtx *dest,
 int
 aarch64_simd_attr_length_move (rtx insn)
 {
-  rtx reg, mem, addr;
-  int load;
   enum machine_mode mode;
 
   extract_insn_cached (insn);
@@ -6666,7 +6664,6 @@ aarch64_split_compare_and_swap (rtx operands[])
 {
   rtx rval, mem, oldval, newval, scratch;
   enum machine_mode mode;
-  enum memmodel mod_s;
   bool is_weak;
   rtx label1, label2, x, cond;
 
@@ -6675,7 +6672,6 @@ aarch64_split_compare_and_swap (rtx operands[])
   oldval = operands[2];
   newval = operands[3];
   is_weak = (operands[4] != const0_rtx);
-  mod_s = (enum memmodel) INTVAL (operands[5]);
   scratch = operands[7];
   mode = GET_MODE (mem);