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Re: Forcing inline assembly code to be produced

From: Kristis Makris <kristis dot makris at asu dot edu>
To: Andrew Haley <aph-gcc at littlepinkcloud dot COM>
Cc: gcc-help at gcc dot gnu dot org
Date: Fri, 27 Apr 2007 10:32:14 -0700
Subject: Re: Forcing inline assembly code to be produced
References: <1177351091.2739.59.camel@syd.mkgnu.net> <17964.64661.769770.630411@zebedee.pink>

On Mon, 2007-04-23 at 19:36 +0100, Andrew Haley wrote:
>  > I'm using gcc 3.3.5 and as 2.15.
> 
>  > Is there a way to force such assembly code to be produced even though it
>  > may be unreachable ? If not should there be a way ?
> 
> If code is unreachable, there's no way to jump to it.  It's not legal
> in gcc to jump into or out of an inline asm.

It seems that I was looking for the 4.1.x optimization flag
-freorder-blocks-and-partition that places the body of uncommon branches
in a separate section and the macro __builtin_expect() that provides
branch prediction hints.

References:
- Forcing inline assembly code to be produced
  - From: Kristis Makris
- Re: Forcing inline assembly code to be produced
  - From: Andrew Haley

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