https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82674
--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> --- Author: segher Date: Tue Oct 31 09:49:40 2017 New Revision: 254252 URL: https://gcc.gnu.org/viewcvs?rev=254252&root=gcc&view=rev Log: Subject: [PATCH] rs6000: Fix crash with big stack clash interval (PR82674) If the user asks for a stack clash probe interval of 64kB, we currently generate a "stdu rX,-65536(r1)" instruction. That instruction does not exist (the offset is a 16-bit signed number). If the offset is too big we should force it into a register and generate a "stdux rX,rY,r1" instruction, instead. PR target/82674 * config/rs6000/rs6000.md (allocate_stack): Force update interval into a register if it does not fit into an immediate offset field. Modified: trunk/gcc/ChangeLog trunk/gcc/config/rs6000/rs6000.md
