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Re: [patch] tuning gcc for Intel Core2


Vladimir Makarov <vmakarov@redhat.com> writes:

> +const int x86_accumulate_outgoing_args = m_ATHLON_K8 | m_CORE2 | m_PENT4 | m_NOCONA | m_PPRO | m_GENERIC;
> +const int x86_prologue_using_move = m_ATHLON_K8 | m_PPRO | m_CORE2 | m_GENERIC;
> +const int x86_epilogue_using_move = m_ATHLON_K8 | m_PPRO | m_CORE2 | m_GENERIC;

Are you sure this is correct? Using moves in epilogue/prolgue
generates much bigger code and AFAIK Core2 has special hardware
to avoid any dependencies on the stack pointer, so shorter push/pop
should be as fast here and use less icache.

-Andi


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