On Apr 13, 2005, at 5:12 PM, Pat Haugen wrote: > Sorry if there is an obvious answer for this, but I'm not to familiar > with > the tree-ssa phase. > > My question is, why doesn't tree-ssa-dse.c do anything to the following > code? Because it does not understand V_MUST_DEF, see PR 18880 for a patch and more information on the problem. -- Pinski