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Re: An issue for the SC: horrible documentation quality of GCC
- From: kenner at vlsi1 dot ultra dot nyu dot edu (Richard Kenner)
- To: rth at redhat dot com
- Cc: gcc at gcc dot gnu dot org
- Date: Fri, 9 May 03 17:41:12 EDT
- Subject: Re: An issue for the SC: horrible documentation quality of GCC
Because cse.c is too slow. It cannot be used for code cleanup
within another pass. Compilation time being high on everyone's
minds, I think this is an exceedingly good reason to have two
passes.
Fair enough, but it would seem that all it has to do is to add a
REG_EQUAL note to accomplish its inter-pass purposes and then let CSE
decide whether the zero or a register is best.