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Re: Reg: Restricting optimization and CR register usage

From: Ian Lance Taylor <iant at google dot com>
To: "Segher Boessenkool" <segher at kernel dot crashing dot org>
Cc: "Void_Star" <praveen_athimon at rediffmail dot com>, gcc-help at gcc dot gnu dot org
Date: Tue, 12 Oct 2010 07:55:27 -0700
Subject: Re: Reg: Restricting optimization and CR register usage
References: <29933073.post@talk.nabble.com> <65370.84.105.60.153.1286813646.squirrel@gate.crashing.org>

"Segher Boessenkool" <segher@kernel.crashing.org> writes:

> Maybe you can force GCC to avoid CR4 by using -ffixed-reg=cr4 .

The option would be -ffixed-cr4.  Another possibility here might be
-fcall-used-cr4, assuming that the system call looks like a function
call rather than, say, an inline asm.

Ian

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References:
- Reg: Restricting optimization and CR register usage
  - From: Void_Star
- Re: Reg: Restricting optimization and CR register usage
  - From: Segher Boessenkool

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