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Re: [RFC] Fix context-sensitiveness of peephole2 pass
- From: Jeff Law <law at redhat dot com>
- To: Eric Botcazou <ebotcazou at adacore dot com>, gcc-patches at gcc dot gnu dot org
- Date: Thu, 24 Oct 2013 23:14:42 -0600
- Subject: Re: [RFC] Fix context-sensitiveness of peephole2 pass
- Authentication-results: sourceware.org; auth=none
- References: <2856601 dot ZucKZt0EVz at polaris>
On 10/24/13 15:10, Eric Botcazou wrote:
As discovered by Richard B. under PR rtl-optimization/58831, the peephole2
pass has been context-sensitive for a long time when scratch registers are
needed, in the sense that the behaviour of the pass for a given function is
dependent on what happened for the previously optimized function.
Obvious patch attached, tested on x86_64-suse-linux. Do we want to apply it
on mainline only or on all the active branches?
2013-10-24 Eric Botcazou <ebotcazou@adacore.com>
* recog.c (search_ofs): New static variable moved from...
(peep2_find_free_register): ...here.
(peephole2_optimize): Initialize it.
OK for trunk. Release branch owners have the final call for their branches.
Thanks for taking the time to track this down.
jeff