Re: [PATCH PR79663]Only reversely combine refs for ZERO length chains in predcom

2017-02-23 Thread Jeff Law
On 02/23/2017 04:24 AM, Bin Cheng wrote: Hi, This patch resolves spec2k/mgrid regression as reported by PR79663. Root cause has been described thoroughly in comment #1/#2 of https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79663 This patch handles ZERO/non-ZERO length chains differently and only r

Re: [PATCH PR79663]Only reversely combine refs for ZERO length chains in predcom

2017-02-23 Thread Richard Biener
On Thu, Feb 23, 2017 at 12:24 PM, Bin Cheng wrote: > Hi, > This patch resolves spec2k/mgrid regression as reported by PR79663. Root > cause has been > described thoroughly in comment #1/#2 of > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79663 > This patch handles ZERO/non-ZERO length chains d

[PATCH PR79663]Only reversely combine refs for ZERO length chains in predcom

2017-02-23 Thread Bin Cheng
Hi, This patch resolves spec2k/mgrid regression as reported by PR79663. Root cause has been described thoroughly in comment #1/#2 of https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79663 This patch handles ZERO/non-ZERO length chains differently and only reversely combines refs for ZERO length cha