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Re: Potential bug in stmt.c (expand_value_return)
- To: Joern Rennecke <amylaar at cygnus dot co dot uk>
- Subject: Re: Potential bug in stmt.c (expand_value_return)
- From: Richard Henderson <rth at cygnus dot com>
- Date: Wed, 2 Feb 2000 13:28:47 -0800
- Cc: Denis Chertykov <denisc at overta dot ru>, gcc at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org
- References: <200002021826.VAA01459@tigris.overta.ru> <200002021843.SAA01053@phal.cygnus.co.uk>
On Wed, Feb 02, 2000 at 06:43:23PM +0000, Joern Rennecke wrote:
> stupid was removed, so it stands reason that all the USEs that were
> emitted only for the benefit of stuid are no longer needed.
> However, the USEs of the return value are not only needed by stupid, but
> also by some optimizations, so I suppose this removal was accidential.
No, it wasn't accidental. The information is available instead
from EXIT_BLOCK_PTR->global_live_at_start.
What optimizations need the actual use insn?
r~