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Re: [cxx-mem-model] expand_atomic_load: Handle an empty target

From: Aldy Hernandez <aldyh at redhat dot com>
To: Andrew MacLeod <amacleod at redhat dot com>
Cc: gcc-patches <gcc-patches at gcc dot gnu dot org>
Date: Thu, 20 Oct 2011 16:05:16 -0500
Subject: Re: [cxx-mem-model] expand_atomic_load: Handle an empty target
References: <4EA08A96.4070209@redhat.com> <4EA08B05.2040802@redhat.com>

On 10/20/11 15:56, Andrew MacLeod wrote:

On 10/20/2011 04:54 PM, Aldy Hernandez wrote:

Found this while testing the branch on ia64. The call to
expand_val_compare_and_swap() above returns NULL_RTX when it can't
find a suitable instruction.

OK for branch?


yes. btw, did you audit the other new expand routines to see if they
handled a NULL return target as well?

Andrew

They seem ok, but I am re-running tests on ia64 to see if I find other similar failures. If I do, I will submit fixes.

Aldy

References:
- [cxx-mem-model] expand_atomic_load: Handle an empty target
  - From: Aldy Hernandez
- Re: [cxx-mem-model] expand_atomic_load: Handle an empty target
  - From: Andrew MacLeod

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