From: liuhongt Date: Mon, 22 May 2023 02:41:50 +0000 (+0800) Subject: Disable avoid_false_dep_for_bmi for atom and icelake(and later) core processors. X-Git-Tag: basepoints/gcc-15~8833 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cc6eb8b51f9568ae0caf46b80e2a0aff050030ce;p=thirdparty%2Fgcc.git Disable avoid_false_dep_for_bmi for atom and icelake(and later) core processors. lzcnt/tzcnt has been fixed since skylake, popcnt has been fixed since icelake. At least for icelake and later intel Core processors, the errata tune is not needed. And the tune isn't need for ATOM either. gcc/ChangeLog: * config/i386/x86-tune.def (X86_TUNE_AVOID_FALSE_DEP_FOR_BMI): Remove ATOM and ICELAKE(and later) core processors. --- diff --git a/gcc/config/i386/x86-tune.def b/gcc/config/i386/x86-tune.def index 9d603cc84e44..e1c72cddf1fb 100644 --- a/gcc/config/i386/x86-tune.def +++ b/gcc/config/i386/x86-tune.def @@ -335,7 +335,8 @@ DEF_TUNE (X86_TUNE_USE_BT, "use_bt", /* X86_TUNE_AVOID_FALSE_DEP_FOR_BMI: Avoid false dependency for bit-manipulation instructions. */ DEF_TUNE (X86_TUNE_AVOID_FALSE_DEP_FOR_BMI, "avoid_false_dep_for_bmi", - m_SANDYBRIDGE | m_CORE_AVX2 | m_TREMONT | m_ALDERLAKE | m_CORE_ATOM + m_SANDYBRIDGE | m_HASWELL | m_SKYLAKE | m_SKYLAKE_AVX512 + | m_CANNONLAKE | m_CASCADELAKE | m_COOPERLAKE | m_LUJIAZUI | m_GENERIC) /* X86_TUNE_ADJUST_UNROLL: This enables adjusting the unroll factor based