Re: [PATCH] tree-optimization/93354 FRE redundant store removal validity fix

2020-01-23 Thread Richard Biener
On Wed, 22 Jan 2020, Richard Biener wrote: > > This fixes the validity check for redundant store removal by looking > at the actual stmt that represents the last (relevant) change to > the TBAA state rather than the imperfectly tracked alias set in the > expression hash table which then becomes u

[PATCH] tree-optimization/93354 FRE redundant store removal validity fix

2020-01-22 Thread Richard Biener
This fixes the validity check for redundant store removal by looking at the actual stmt that represents the last (relevant) change to the TBAA state rather than the imperfectly tracked alias set in the expression hash table which then becomes unused (see a followup change to get rid of that). On