From: Jan Hubicka <jh@suse.cz>
Date: Wed, 17 Jan 2024 18:14:16 +0000 (+0100)
Subject: Fix handling of X86_TUNE_AVOID_512FMA_CHAINS.
X-Git-Tag: basepoints/gcc-15~1949
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f74dd70c3c7ef2ac19bca33de5fb03a73fbcd339;p=thirdparty%2Fgcc.git

Fix handling of X86_TUNE_AVOID_512FMA_CHAINS.

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.

gcc/ChangeLog:

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

diff --git a/gcc/config/i386/i386-options.cc b/gcc/config/i386/i386-options.cc
index 3605c2c53fbd..b6f634e9a323 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);