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[Bug tree-optimization/81346] Missed constant propagation into comparison
- From: "jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 19 Jul 2017 13:10:37 +0000
- Subject: [Bug tree-optimization/81346] Missed constant propagation into comparison
- Auto-submitted: auto-generated
- References: <bug-81346-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81346
--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Jul 19 13:10:05 2017
New Revision: 250342
URL: https://gcc.gnu.org/viewcvs?rev=250342&root=gcc&view=rev
Log:
PR tree-optimization/81346
* match.pd: Optimize (X - 1U) <= INT_MAX-1U into (int) X > 0.
* gcc.dg/tree-ssa/pr81346-5.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr81346-5.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/match.pd
trunk/gcc/testsuite/ChangeLog