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Re: [GCC 4.2 Project] Replacements for CSE path following


Paolo Bonzini <bonzini@gnu.org> wrote:

>      This pass does simple forward propagation and simplification when
> an operand of an insn can only come from a single def. The pass has a
> very good potential of catching simplifications currently done by
> inter-basic-block CSE (-fcse-follow-jumps and -fcse-skip-blocks) and
> combine: however, it is much faster than inter-basic-block CSE and
> runs much earlier than combine.

It is not clear whether this patch will make -fcse-follow-jumps
/ -fcse-skip-blocks obsolete and thus disable/remove them. I think this should
be clearly stated.

Giovanni Bajo


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