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Re: How to teach gcc, that registers are clobbered by api calls?

From: "H.J. Lu" <hjl dot tools at gmail dot com>
To: "Kai Tietz" <Kai dot Tietz at onevision dot com>
Cc: gcc at gcc dot gnu dot org
Date: Mon, 21 Apr 2008 09:03:00 -0700
Subject: Re: How to teach gcc, that registers are clobbered by api calls?
References: <OFDBB7E7A6.9CE3CC50-ONC1257432.002AA1A6-C1257432.002AE96C@onevision.de>

Are r10-r15 callee-saved in w64ABI?


H.J.
On Mon, Apr 21, 2008 at 12:48 AM, Kai Tietz <Kai.Tietz@onevision.com> wrote:
> Hi,
>
>  I found, that the problem for an optimized build (by -O2) is broken for
>  the x86_64-pc-mingw32 target, because the runtime functions from msvcrt
>  are clobbering registers (%r10 upto %r15). I tried to get it solved by
>  call_used and fixed_regs, but it seems not to work. May somebody could
>  give me a hint how to solve this problem?
>
>  Thanks in advance,
>   Kai
>
>  |  (\_/)  This is Bunny. Copy and paste Bunny
>  | (='.'=) into your signature to help him gain
>  | (")_(") world domination.
>
>

References:
- How to teach gcc, that registers are clobbered by api calls?
  - From: Kai Tietz

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