Make zero_extends explicit for common AArch64 SI mode patterns

From-SVN: r194649

gcc/ChangeLog

+2012-12-20  Ian Bolton  <ian.bolton@arm.com>
+
+	* gcc/config/aarch64/aarch64.md
+	(*addsi3_aarch64_uxtw): New pattern.
+	(*addsi3_compare0_uxtw): New pattern.
+	(*add_<shift>_si_uxtw): New pattern.
+	(*add_<optab><SHORT:mode>_si_uxtw): New pattern.
+	(*add_<optab><SHORT:mode>_shft_si_uxtw): New pattern.
+	(*add_<optab><SHORT:mode>_mult_si_uxtw): New pattern.
+	(*add_<optab>si_multp2_uxtw): New pattern.
+	(*addsi3_carryin_uxtw): New pattern.
+	(*addsi3_carryin_alt1_uxtw): New pattern.
+	(*addsi3_carryin_alt2_uxtw): New pattern.
+	(*addsi3_carryin_alt3_uxtw): New pattern.
+	(*add_uxtsi_multp2_uxtw): New pattern.
+	(*subsi3_uxtw): New pattern.
+	(*subsi3_compare0_uxtw): New pattern.
+	(*sub_<shift>_si_uxtw): New pattern.
+	(*sub_mul_imm_si_uxtw): New pattern.
+	(*sub_<optab><SHORT:mode>_si_uxtw): New pattern.
+	(*sub_<optab><SHORT:mode>_shft_si_uxtw): New pattern.
+	(*sub_<optab>si_multp2_uxtw): New pattern.
+	(*sub_uxtsi_multp2_uxtw): New pattern.
+	(*negsi2_uxtw): New pattern.
+	(*negsi2_compare0_uxtw): New pattern.
+	(*neg_<shift>_si2_uxtw): New pattern.
+	(*neg_mul_imm_si2_uxtw): New pattern.
+	(*mulsi3_uxtw): New pattern.
+	(*maddsi_uxtw): New pattern.
+	(*msubsi_uxtw): New pattern.
+	(*mulsi_neg_uxtw): New pattern.
+	(*<su_optab>divsi3_uxtw): New pattern.
+
 2012-12-20  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/55750