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Re: Enabling -frename-registers?

From: Bernd Schmidt <bschmidt at redhat dot com>
To: Alan Modra <amodra at gmail dot com>
Cc: David Edelsohn <dje dot gcc at gmail dot com>, Richard Biener <richard dot guenther at gmail dot com>, Jeffrey Law <law at redhat dot com>, GCC Patches <gcc-patches at gcc dot gnu dot org>, Segher Boessenkool <segher at kernel dot crashing dot org>
Date: Wed, 4 May 2016 11:08:47 +0200
Subject: Re: Enabling -frename-registers?
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References: <CAGWvnykBEjYMgOCaR_ZGLwB3fxPg-pB3WPSwAvmUBXzmXct8gg at mail dot gmail dot com> <57236285 dot 5090908 at redhat dot com> <CAGWvnykKwAtfSin23FP4L0bNgH4bSAdV+vMRTOe+dPk15oAfGg at mail dot gmail dot com> <57236547 dot 2070707 at redhat dot com> <CAGWvnyka9pPjOmFFb8avhBWNAOWGygOeCfUzKCZbY3dxux48LQ at mail dot gmail dot com> <443D7834-6E23-4046-8DD7-F1D8F2593F2B at gmail dot com> <CAGWvny=KPTheWKc-CbKrWGsGfBXB9vWz57RfVRUY_NTOBPUKZg at mail dot gmail dot com> <57292BBF dot 8010202 at redhat dot com> <20160504090528 dot GX18915 at bubble dot grove dot modra dot org>

On 05/04/2016 11:05 AM, Alan Modra wrote:

I agree it's good to find these things..  Another nasty bug to add to
the list is complete breakage of gccgo on powerpc64le.  I see register
renaming around the prologue call to __morestack, which trashes
function arguments.

How does this come about, is there something incorrect about the RTLrepresentation of __morestack?



Bernd

Follow-Ups:
- Re: Enabling -frename-registers?
  - From: Alan Modra

References:
- Re: Enabling -frename-registers?
  - From: David Edelsohn
- Re: Enabling -frename-registers?
  - From: Bernd Schmidt
- Re: Enabling -frename-registers?
  - From: Alan Modra

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