On 04/24/2017 03:13 PM, Jakub Jelinek wrote:
Hi!The following testcase ICEs, because ve->reg is a SUBREG and thus should not be shared, but we initialize sum to ve->reg, then add to it some REGs (which can be shared always), and finally assign the addition etc. result into ve->reg. Fixed thusly, bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk? 2017-04-24 Jakub Jelinek <ja...@redhat.com> PR rtl-optimization/80500 * loop-unroll.c (combine_var_copies_in_loop_exit): Call copy_rtx on sum's initial value. * gcc.dg/pr80500.c: New test.
OK with some kind of comment indicating why we need to do the copy. Jeff
