From cc6eb8b51f9568ae0caf46b80e2a0aff050030ce Mon Sep 17 00:00:00 2001 From: liuhongt Date: Mon, 22 May 2023 10:41:50 +0800 Subject: 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. --- gcc/config/i386/x86-tune.def | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'gcc') diff --git a/gcc/config/i386/x86-tune.def b/gcc/config/i386/x86-tune.def index 9d603cc..e1c72cd 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 -- cgit v1.1