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Re: combine and unordered compares
- To: Jan Hubicka <jh at suse dot cz>
- Subject: Re: combine and unordered compares
- From: Richard Henderson <rth at redhat dot com>
- Date: Sat, 6 Jan 2001 16:39:04 -0800
- Cc: patches at x86-64 dot org, rth at cygnus dot com, gcc-patches at gcc dot gnu dot org
- References: <20010106224515.D4737@atrey.karlin.mff.cuni.cz>
On Sat, Jan 06, 2001 at 10:45:15PM +0100, Jan Hubicka wrote:
> * combine.c (combine_simplify_rtx): Recognize the unordered compares.
> (nonzero_bits): Likewise.
> (simplify_comparison): Likewise.
> (num_sign_bit_copies): Likewise; return more sane value depending
> on STORE_FLAG_VALUE.
Looks like all of these are missing cases for ORDERED and UNORDERED.
> (known_cond): Do not assume EQ to be always true for equivalent
> operands.
Otherwise ok.
r~