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Re: fix libgomp miscompilation on ppc64

From: Mike Stump <mrs at apple dot com>
To: Richard Henderson <rth at redhat dot com>
Cc: gcc-patches at gcc dot gnu dot org
Date: Tue, 24 Jan 2006 18:11:50 -0800
Subject: Re: fix libgomp miscompilation on ppc64
References: <20060124235345.GA22539@redhat.com>

On Jan 24, 2006, at 3:53 PM, Richard Henderson wrote:

As discussed elsewhere, provides another way for memory barriers
to have memory barrier semantics

+#define ALIAS_SET_MEMORY_BARRIER ((HOST_WIDE_INT) -1)

Random thought for the day, can this be used for stack slot reuse when unions are involved and -Os is given to shrink the stack space required and yet still get the impossible to conflict stack slots to then conflict?

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References:
- fix libgomp miscompilation on ppc64
  - From: Richard Henderson

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