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The following fixes a regression introduced by r11-5542 which restricts replacing uses of live original defs of now vectorized stmts to when that does not require new loop-closed PHIs to be inserted. That restriction keeps the original scalar definition live which is sub-optimal and also not reflected in costing. The particular case the following fixes can be seen in gcc.dg/vect/bb-slp-57.c is the case where we are replacing an existing loop closed PHI argument. PR tree-optimization/98064 * tree-vect-loop.cc (vectorizable_live_operation): Do not restrict replacing uses in a LC PHI. * gcc.dg/vect/bb-slp-57.c: Verify we do not keep original stmts live.
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