i386: Avoid fma_chain for -march=alderlake and sapphirerapids.

For Alderlake there is similar issue like PR81616, enable
avoid_fma256_chain will also benefit on Intel latest platforms
Alderlake and Sapphire Rapids.

gcc/ChangeLog:

	* config/i386/x86-tune.def (X86_TUNE_AVOID_256FMA_CHAINS): Add
	m_SAPPHIRERAPIDS, m_ALDERLAKE.

diff --git a/gcc/config/i386/x86-tune.def b/gcc/config/i386/x86-tune.def
index d983e2f6213f8b54f32ae854145bc25e8da73abd..1e1b206a71c6434380914fa27e43f79319217d9d 100644 (file)
--- a/gcc/config/i386/x86-tune.def
+++ b/gcc/config/i386/x86-tune.def
@@ -485,7 +485,8 @@ DEF_TUNE (X86_TUNE_AVOID_128FMA_CHAINS, "avoid_fma_chains", m_ZNVER)
 
 /* X86_TUNE_AVOID_256FMA_CHAINS: Avoid creating loops with tight 256bit or
    smaller FMA chain.  */
-DEF_TUNE (X86_TUNE_AVOID_256FMA_CHAINS, "avoid_fma256_chains", m_ZNVER2 | m_ZNVER3)
+DEF_TUNE (X86_TUNE_AVOID_256FMA_CHAINS, "avoid_fma256_chains", m_ZNVER2 | m_ZNVER3
+         | m_ALDERLAKE | m_SAPPHIRERAPIDS)
 
 /* X86_TUNE_V2DF_REDUCTION_PREFER_PHADDPD: Prefer haddpd
    for v2df vector reduction.  */