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Re: adding movz to machine description

From: "Petar Bajic" <petar dot bajic at micronasnit dot com>
To: "Ian Lance Taylor" <iant at google dot com>
Cc: <gcc-help at gcc dot gnu dot org>
Date: Tue, 25 Jul 2006 12:11:10 +0200
Subject: Re: adding movz to machine description
References: <001c01c6acab$dac77e50$4900a8c0@niit.micronasnit.com> <m38xmmrkec.fsf@dhcp-172-18-108-229.corp.google.com>

It may be correct for the pattern to not be matched with expand.  It's
OK if the if-conversion pass picks it up, which seems to be what is
happening for you.

If the generated code you are getting is wrong, then problem is likely
in the define_insn patterns somewhere.  They don't correct represent
what the instruction does, or they don't correctly implement it.

Ian

After some modifications, I managed to make gcc use my define_expand - I see it in debug.11.ce1 and following files, but then it disapears in debug.17.combine, and in the end it does not appear in asm code. How to find out what kills it? :)

Follow-Ups:
- Re: adding movz to machine description
  - From: Ian Lance Taylor

References:
- adding movz to machine description
  - From: Petar Bajic
- Re: adding movz to machine description
  - From: Ian Lance Taylor

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