Fwd: [PATCH 3/3]Improve induction variable elimination

Hi, forward to Zdenek for the review. Thanks, bin -- Forwarded message -- From: Bin Cheng Date: Thu, Jul 17, 2014 at 10:09 AM Subject: [PATCH 3/3]Improve induction variable elimination To: gcc-patches@gcc.gnu.org Hi, Function iv_elimination_compare_lt is used to eliminate

Fwd: [PATCH 3/3]Improve induction variable elimination

Forward to Zdenek for the review. Thanks, bin -- Forwarded message -- From: Bin Cheng Date: Thu, Jul 17, 2014 at 10:09 AM Subject: [PATCH 3/3]Improve induction variable elimination To: gcc-patches@gcc.gnu.org Hi, Function iv_elimination_compare_lt is used to eliminate

[PATCH 3/3]Improve induction variable elimination

Hi, Function iv_elimination_compare_lt is used to eliminate induction variable when the loop's latch could run for zero time (i.e., may_be_zero in loop niter information evaluates to true). As stated in the first message, it only handles very specific case that rarely happens for either GCC bootst