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Re: RTL problem with optimizations


Petar Penchev wrote:
My questions are about this .web file , what it is ? and why compiler decides to replace clobber register ?

Others have reported the same problem. See for instance PR 15334 for the m68hc11 target. They fixed it by disabling the web pass. They are using the same construct, a clobber of a match_dup of an input operand to a shift.


This is probably a generic bug in the the -fweb pass, that someone will eventually have to track down and fix. Right now, it is only affecting obscure targets, so it hasn't gotten much attention.
--
Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com



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