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Re: combine twee
- To: jh at suse dot cz
- Subject: Re: combine twee
- From: Joern Rennecke <amylaar at redhat dot com>
- Date: Mon, 6 Nov 2000 21:08:26 +0000 (GMT)
- Cc: gcc-patches at gcc dot gnu dot org, rth at cygnus dot com, discuss at x86-64 dot org, amylaar at cygnus dot co dot uk
>Hi
>This patch avoids combine from combining loads/stores to hard register with the
>instruction. This was primarily made to fix testcase sent few minutes ago
>(that shows up in the x86-64 port due to register passing conventions), but it
>also improves the code on 2 address non-SRC machines.
This patch is an uncalled-for pessimization. You should allow combinations
that involve fixed hard registers.