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Fix handling of X86_TUNE_AVOID_512FMA_CHAINS

Message ID ZagOpYQD5GpKc8Kz@kam.mff.cuni.cz
State Accepted
Headers
Series Fix handling of X86_TUNE_AVOID_512FMA_CHAINS |

Checks

Context Check Description
snail/gcc-patch-check success Github commit url

Commit Message

Jan Hubicka Jan. 17, 2024, 5:30 p.m. UTC 
  Hi,
I have noticed quite bad pasto in handling of X86_TUNE_AVOID_512FMA_CHAINS.  At the
moment it is ignored, but X86_TUNE_AVOID_256FMA_CHAINS controls 512FMA too.
This patch fixes it, we may want to re-check how that works on AVX512 machines.

Bootstrapped/regtested x86_64-linux, will commit it shortly.

Honza

gcc/ChangeLog:

	* config/i386/i386-options.cc (ix86_option_override_internal): Fix
	handling of X86_TUNE_AVOID_512FMA_CHAINS.
diff mbox series

Patch

diff --git a/gcc/config/i386/i386-options.cc b/gcc/config/i386/i386-options.cc
index 3605c2c53fb..b6f634e9a32 100644
--- a/gcc/config/i386/i386-options.cc
+++ b/gcc/config/i386/i386-options.cc
@@ -3248,7 +3248,7 @@  ix86_option_override_internal (bool main_args_p,
       = (cf_protection_level) (opts->x_flag_cf_protection | CF_SET);
     }
 
-  if (ix86_tune_features [X86_TUNE_AVOID_256FMA_CHAINS])
+  if (ix86_tune_features [X86_TUNE_AVOID_512FMA_CHAINS])
     SET_OPTION_IF_UNSET (opts, opts_set, param_avoid_fma_max_bits, 512);
   else if (ix86_tune_features [X86_TUNE_AVOID_256FMA_CHAINS])
     SET_OPTION_IF_UNSET (opts, opts_set, param_avoid_fma_max_bits, 256);