Re: [PATCH] Fix reassoc ICE (PR tree-optimization/56559)

2013-03-07 Thread Richard Biener
On Thu, 7 Mar 2013, Jakub Jelinek wrote: > Hi! > > During zero_one_operation I believe we can count in the chain having single > uses if we go through rhs1s, but the change from last year also added > looking through rhs2, and there I don't see anything that would guarantee > a single use, and th

[PATCH] Fix reassoc ICE (PR tree-optimization/56559)

2013-03-07 Thread Jakub Jelinek
Hi! During zero_one_operation I believe we can count in the chain having single uses if we go through rhs1s, but the change from last year also added looking through rhs2, and there I don't see anything that would guarantee a single use, and the following testcase shows where it has two uses. If