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Hi, The issue here is that we have: sv_1(D)->i = { 0, 0, 0, 0 }; D.1242_2 = VIEW_CONVERT_EXPR<vector float>(sv_1(D)->i); And FRE/PRE does not see that it could look through the VCE even though we could. This patch allows SCCVN to look through the VCE. OK? Bootstrapped and tested on i686-linux-gnu with no regressions. Thanks, Andrew Pinski ChangeLog: * tree-ssa-sccvn.c (visit_reference_op_load): If vn_reference_lookup is returns NULL and OP is a VCE, look through the VCE. (visit_reference_op_store): Unwrap the VCE. * gcc.dg/tree-ssa/fre-vce-1.c: New testcase.
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