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Re: Using and clobbering hard regs in parallel
- To: Stephen dot Clarke at st dot com (Stephen Clarke)
- Subject: Re: Using and clobbering hard regs in parallel
- From: Joern Rennecke <amylaar at redhat dot com>
- Date: Fri, 20 Jul 2001 19:38:22 +0100 (BST)
- Cc: gcc at gcc dot gnu dot org, geoffk at geoffk dot org
That is a known problem. The new flow.c code has redefined the
semantics of REG_DEAD / REG_UNUSED notes, while the rest of the
compiler - including the documentation - stays with the old semantics.
Note, the REG_DEAD note was never exactly wrong - but it used to be optional.
Now it is optional in all passes but flow.