[AArch64] Add extra tuning parameters for target processors

gcc/

	* config/aarch64/aarch64-protos.h (tune_params): Add new members
	"max_case_values" and "cache_line_size".
	* config/aarch64/aarch64.c (aarch64_case_values_threshold): New
	function.
	(aarch64_override_options_internal): Tune heuristics based on new
	members in "tune_params".
	(TARGET_CASE_VALUES_THRESHOLD): Define macro.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@230261 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ecd3711..27a1e9e 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,13 @@
+2015-11-12  Evandro Menezes  <e.menezes@samsung.com>
+
+       * config/aarch64/aarch64-protos.h (tune_params): Add new members
+       "max_case_values" and "cache_line_size".
+       * config/aarch64/aarch64.c (aarch64_case_values_threshold): New
+       function.
+       (aarch64_override_options_internal): Tune heuristics based on new
+       members in "tune_params".
+       (TARGET_CASE_VALUES_THRESHOLD): Define macro.
+
 2015-11-12  Richard Biener  <rguenther@suse.de>
 
        PR tree-optimization/68306

diff --git a/gcc/config/aarch64/aarch64-protos.h b/gcc/config/aarch64/aarch64-protos.h
index 7c74f58..9000d67 100644 (file)
--- a/gcc/config/aarch64/aarch64-protos.h
+++ b/gcc/config/aarch64/aarch64-protos.h
@@ -195,6 +195,10 @@ struct tune_params
   int vec_reassoc_width;
   int min_div_recip_mul_sf;
   int min_div_recip_mul_df;
+  /* Value for aarch64_case_values_threshold; or 0 for the default.  */
+  unsigned int max_case_values;
+  /* Value for PARAM_L1_CACHE_LINE_SIZE; or 0 to use the default.  */
+  unsigned int cache_line_size;
 
 /* An enum specifying how to take into account CPU autoprefetch capabilities
    during instruction scheduling:

diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 7d6dfc3..5ec7f08 100644 (file)
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -356,6 +356,8 @@ static const struct tune_params generic_tunings =
   1,   /* vec_reassoc_width.  */
   2,   /* min_div_recip_mul_sf.  */
   2,   /* min_div_recip_mul_df.  */
+  0,   /* max_case_values.  */
+  0,   /* cache_line_size.  */
   tune_params::AUTOPREFETCHER_OFF,     /* autoprefetcher_model.  */
   (AARCH64_EXTRA_TUNE_NONE)    /* tune_flags.  */
 };
@@ -379,6 +381,8 @@ static const struct tune_params cortexa53_tunings =
   1,   /* vec_reassoc_width.  */
   2,   /* min_div_recip_mul_sf.  */
   2,   /* min_div_recip_mul_df.  */
+  0,   /* max_case_values.  */
+  0,   /* cache_line_size.  */
   tune_params::AUTOPREFETCHER_WEAK,    /* autoprefetcher_model.  */
   (AARCH64_EXTRA_TUNE_NONE)    /* tune_flags.  */
 };
@@ -402,6 +406,8 @@ static const struct tune_params cortexa57_tunings =
   1,   /* vec_reassoc_width.  */
   2,   /* min_div_recip_mul_sf.  */
   2,   /* min_div_recip_mul_df.  */
+  0,   /* max_case_values.  */
+  0,   /* cache_line_size.  */
   tune_params::AUTOPREFETCHER_WEAK,    /* autoprefetcher_model.  */
   (AARCH64_EXTRA_TUNE_RENAME_FMA_REGS
    | AARCH64_EXTRA_TUNE_RECIP_SQRT)    /* tune_flags.  */
@@ -426,6 +432,8 @@ static const struct tune_params cortexa72_tunings =
   1,   /* vec_reassoc_width.  */
   2,   /* min_div_recip_mul_sf.  */
   2,   /* min_div_recip_mul_df.  */
+  0,   /* max_case_values.  */
+  0,   /* cache_line_size.  */
   tune_params::AUTOPREFETCHER_OFF,     /* autoprefetcher_model.  */
   (AARCH64_EXTRA_TUNE_NONE)    /* tune_flags.  */
 };
@@ -448,6 +456,8 @@ static const struct tune_params thunderx_tunings =
   1,   /* vec_reassoc_width.  */
   2,   /* min_div_recip_mul_sf.  */
   2,   /* min_div_recip_mul_df.  */
+  0,   /* max_case_values.  */
+  0,   /* cache_line_size.  */
   tune_params::AUTOPREFETCHER_OFF,     /* autoprefetcher_model.  */
   (AARCH64_EXTRA_TUNE_NONE)    /* tune_flags.  */
 };
@@ -470,6 +480,8 @@ static const struct tune_params xgene1_tunings =
   1,   /* vec_reassoc_width.  */
   2,   /* min_div_recip_mul_sf.  */
   2,   /* min_div_recip_mul_df.  */
+  0,   /* max_case_values.  */
+  0,   /* cache_line_size.  */
   tune_params::AUTOPREFETCHER_OFF,     /* autoprefetcher_model.  */
   (AARCH64_EXTRA_TUNE_RECIP_SQRT)      /* tune_flags.  */
 };
@@ -3240,6 +3252,20 @@ aarch64_cannot_force_const_mem (machine_mode mode ATTRIBUTE_UNUSED, rtx x)
   return aarch64_tls_referenced_p (x);
 }
 
+/* Implement TARGET_CASE_VALUES_THRESHOLD.  */
+
+static unsigned int
+aarch64_case_values_threshold (void)
+{
+  /* Use the specified limit for the number of cases before using jump
+     tables at higher optimization levels.  */
+  if (optimize > 2
+      && selected_cpu->tune->max_case_values != 0)
+    return selected_cpu->tune->max_case_values;
+  else
+    return default_case_values_threshold ();
+}
+
 /* Return true if register REGNO is a valid index register.
    STRICT_P is true if REG_OK_STRICT is in effect.  */
 
@@ -7782,6 +7808,13 @@ aarch64_override_options_internal (struct gcc_options *opts)
                         opts->x_param_values,
                         global_options_set.x_param_values);
 
+  /* Set the L1 cache line size.  */
+  if (selected_cpu->tune->cache_line_size != 0)
+    maybe_set_param_value (PARAM_L1_CACHE_LINE_SIZE,
+                          selected_cpu->tune->cache_line_size,
+                          opts->x_param_values,
+                          global_options_set.x_param_values);
+
   aarch64_override_options_after_change_1 (opts);
 }
 
@@ -13526,6 +13559,9 @@ aarch64_promoted_type (const_tree t)
 #undef TARGET_CANNOT_FORCE_CONST_MEM
 #define TARGET_CANNOT_FORCE_CONST_MEM aarch64_cannot_force_const_mem
 
+#undef TARGET_CASE_VALUES_THRESHOLD
+#define TARGET_CASE_VALUES_THRESHOLD aarch64_case_values_threshold
+
 #undef TARGET_CONDITIONAL_REGISTER_USAGE
 #define TARGET_CONDITIONAL_REGISTER_USAGE aarch64_conditional_register_usage