Tweak the pipeline model for Exynos M1

	* gcc/config/aarch64/aarch64.c
	(exynosm1_tunings): Enable the weak prefetching model.

From-SVN: r234307

gcc/ChangeLog

+2016-03-17  Evandro Menezes  <e.menezes@samsung.com>
+	
+	Tweak the pipeline model for Exynos M1
+
+	* config/aarch64/aarch64.c (exynosm1_tunings): 	Enable weak prefetching
+	model.
+
 2016-03-17  David Malcolm  <dmalcolm@redhat.com>
 
 	PR c/70264

gcc/config/aarch64/aarch64.c

@@ -537,7 +537,7 @@ static const struct tune_params exynosm1_tunings =
   2,	/* min_div_recip_mul_df.  */
   48,	/* max_case_values.  */
   64,	/* cache_line_size.  */
-  tune_params::AUTOPREFETCHER_OFF, /* autoprefetcher_model.  */
+  tune_params::AUTOPREFETCHER_WEAK, /* autoprefetcher_model.  */
   (AARCH64_EXTRA_TUNE_APPROX_RSQRT) /* tune_flags.  */
 };