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[Bug tree-optimization/81403] [8 Regression] wrong code at -O3
- From: "glisse at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 12 Jul 2017 07:14:51 +0000
- Subject: [Bug tree-optimization/81403] [8 Regression] wrong code at -O3
- Auto-submitted: auto-generated
- References: <bug-81403-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81403
--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
/* x & C -> x if we know that x & ~C == 0. */
Not clear where it is getting the bogus range/nonzero information from, I
thought we had fixed all the places reusing SSA_NAMEs with stale information.