https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68634
--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> --- Author: segher Date: Fri Jan 8 03:58:40 2016 New Revision: 232148 URL: https://gcc.gnu.org/viewcvs?rev=232148&root=gcc&view=rev Log: shrink-wrap: Once more PRs 67778, 68634, and now 68909 If a candidate PRE cannot get the prologue because a block BB is reachable from it, but PRE does not dominate BB, we try again with the dominators of PRE. That "try again" needs to again consider BB though, we aren't done with it. PR rtl-optimization/67778 PR rtl-optimization/68634 PR rtl-optimization/68909 * shrink-wrap.c (try_shrink_wrapping): Add comment. Don't pop block from the stack until done with it. Remove a superfluous bitmap set. Remove a superfluous bitmap test. Modified: trunk/gcc/ChangeLog trunk/gcc/shrink-wrap.c
