https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91880
--- Comment #4 from jcmvbkbc at gcc dot gnu.org --- Author: jcmvbkbc Date: Thu Sep 26 20:51:27 2019 New Revision: 276166 URL: https://gcc.gnu.org/viewcvs?rev=276166&root=gcc&view=rev Log: xtensa: fix PR target/91880 Xtensa hwloop_optimize segfaults when zero overhead loop is about to be inserted as the first instruction of the function. Insert zero overhead loop instruction into new basic block before the loop when basic block that precedes the loop is empty. 2019-09-26 Max Filippov <jcmvb...@gmail.com> gcc/ * config/xtensa/xtensa.c (hwloop_optimize): Insert zero overhead loop instruction into new basic block before the loop when basic block that precedes the loop is empty. gcc/testsuite/ * gcc.target/xtensa/pr91880.c: New test case. * gcc.target/xtensa/xtensa.exp: New test suite. Added: trunk/gcc/testsuite/gcc.target/xtensa/ trunk/gcc/testsuite/gcc.target/xtensa/pr91880.c trunk/gcc/testsuite/gcc.target/xtensa/xtensa.exp Modified: trunk/gcc/ChangeLog trunk/gcc/config/xtensa/xtensa.c trunk/gcc/testsuite/ChangeLog
