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[Bug tree-optimization/55334] mgrid regression (ipa-cp disables vectorization)
- From: "vincenzo.innocente at cern dot ch" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 16 Nov 2012 13:58:33 +0000
- Subject: [Bug tree-optimization/55334] mgrid regression (ipa-cp disables vectorization)
- Auto-submitted: auto-generated
- References: <bug-55334-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55334
--- Comment #12 from vincenzo Innocente <vincenzo.innocente at cern dot ch> 2012-11-16 13:58:33 UTC ---
so a "better" c case is
float * mem;
void sumN(int n) {
float * a=mem;
/*const*/ float * b=mem+n;
/*const*/ float * c=mem+2*n;
for (int i=0;i!=n;++i)
a[i]=b[i]+c[i];
}