i386-options.c (ix86_option_override_internal): Default PARAM_AVOID_FMA_MAX_BITS...

	* config/i386/i386-options.c (ix86_option_override_internal): Default
	PARAM_AVOID_FMA_MAX_BITS to 256 for znver2.

From-SVN: r273730

diff --git a/gcc/config/i386/i386-options.c b/gcc/config/i386/i386-options.c
index 6f8851aaf863b9f3941e7dff58152772414a9c5c..a1741c02e915f7a41ad573fa1b41e85845b06945 100644 (file)
--- a/gcc/config/i386/i386-options.c
+++ b/gcc/config/i386/i386-options.c
@@ -2779,7 +2779,11 @@ ix86_option_override_internal (bool main_args_p,
     opts->x_flag_cf_protection
       = (cf_protection_level) (opts->x_flag_cf_protection | CF_SET);
 
-  if (ix86_tune_features [X86_TUNE_AVOID_128FMA_CHAINS])
+  if (ix86_tune_features [X86_TUNE_AVOID_256FMA_CHAINS])
+    maybe_set_param_value (PARAM_AVOID_FMA_MAX_BITS, 256,
+                          opts->x_param_values,
+                          opts_set->x_param_values);
+  else if (ix86_tune_features [X86_TUNE_AVOID_128FMA_CHAINS])
     maybe_set_param_value (PARAM_AVOID_FMA_MAX_BITS, 128,
                           opts->x_param_values,
                           opts_set->x_param_values);