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Re: [patch] Add TST to RX

From: DJ Delorie <dj at redhat dot com>
To: Paolo Bonzini <bonzini at gnu dot org>
Cc: gcc-patches at gcc dot gnu dot org, nickc at redhat dot com
Date: Wed, 14 Jul 2010 12:23:23 -0400
Subject: Re: [patch] Add TST to RX
References: <201007140217.o6E2Hp4w001032@greed.delorie.com> <4C3D7380.5070203@gnu.org>

> This seems wrong.  It should be (if_then_else (ne (zero_extract:SI 
> ...))).  If that one is not generated by combine (likely because ne is 
> removed somewhere?) that should be fixed.
> 
> This pattern may well be the reason why canonicalize_condition is called 
> with a non-comparison RTL.

It is caused by combine.  I put a debug_rtx() after
recog_for_combine() to see what gcc is expecting, and that's the
pattern it's looking for.

Feel free to figure *that* one out too :-)

Follow-Ups:
- Re: [patch] Add TST to RX
  - From: DJ Delorie
- Re: [patch] Add TST to RX
  - From: Paolo Bonzini

References:
- [patch] Add TST to RX
  - From: DJ Delorie
- Re: [patch] Add TST to RX
  - From: Paolo Bonzini

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