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Re: mach pass

From: Jeff Law <law at redhat dot com>
To: Ian Lance Taylor <iant at google dot com>
Cc: Abdul Wahid Memon <engrwahidmemon at gmail dot com>, gcc at gcc dot gnu dot org
Date: Fri, 05 Nov 2010 09:18:36 -0600
Subject: Re: mach pass
References: <AANLkTi=BWR0OXjPqvk1df33pX6TEWpEafpBJytg8u+Dz@mail.gmail.com> <mcrwrorddc6.fsf@google.com>

On 11/05/10 09:01, Ian Lance Taylor wrote:

Abdul Wahid Memon<engrwahidmemon@gmail.com> writes:
Can anyone please give me a two line description about mach pass in
GCC or any source reference for that.
I don't know what you mean by "mach pass".

I'd hazard a guess Abdul is referring to the machine dependent reorg pass, which has the .mach debugging dump file.

The machine dependent reorg pass is a late optimization pass (runs just prior to delay slot filling) that is entirely machine dependent. It is generally frowned upon to implement optimizations in the machine dependent reorganization pass, though several ports now implement such optimizations, including:

alpha, arm, avr, bfin, frv, h8300, x86, ia64, m68hc11, mcore, mep, mips, mmix, pa, pico, s390, sh, spu, xstormy16, v850.

jeff

References:
- mach pass
  - From: Abdul Wahid Memon
- Re: mach pass
  - From: Ian Lance Taylor

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