https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78186
--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> --- Author: segher Date: Thu Nov 3 16:04:22 2016 New Revision: 241824 URL: https://gcc.gnu.org/viewcvs?rev=241824&root=gcc&view=rev Log: combine lhs zero_extract fix (PR78186) PR rtl-optimization/78186 * combine.c (change_zero_ext): Mask the RHS of a zero_extract as well, when converting to IOR. Modified: trunk/gcc/ChangeLog trunk/gcc/combine.c