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[Bug tree-optimization/30997] FRE does not value number comparisons in COND_EXPRs
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 28 Feb 2007 19:20:12 -0000
- Subject: [Bug tree-optimization/30997] FRE does not value number comparisons in COND_EXPRs
- References: <bug-30997-10053@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #1 from pinskia at gcc dot gnu dot org 2007-02-28 19:20 -------
well that is undefined code anyways :)
int foo(int a) { int tmp = a > 2; if (a > 2) return tmp; return 10;}
Note we do simplify this later on after PRE/FRE as we sink the a>2 into the
other basic block and then VRP comes about and finds it is always true.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30997