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The x86 add_stmt_hook relies on the passed vectype to determine the mode and whether it is FP for a scalar operation. This is unreliable now for stmts involving patterns and in the future when there is no vector type passed for scalar operations. To be least disruptive I've kept using the vector type if it is passed. * config/i386/i386.cc (ix86_vector_costs::add_stmt_cost): Use the LHS of a scalar stmt to determine mode and whether it is FP.
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