2012-10-23  Marc Glisse  <marc.glisse@inria.fr>

gcc/
	* tree-ssa-forwprop.c (forward_propagate_into_cond): Handle vectors.
	* fold-const.c (fold_relational_const): Handle VECTOR_CST.
	* doc/generic.texi (VEC_COND_EXPR): Document current policy.

gcc/testsuite/
	* gcc.dg/tree-ssa/foldconst-6.c: New testcase.

From-SVN: r192711