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gcc/ChangeLog * common.opt (flag_ira_hoist_pressure): New. * doc/invoke.texi (-fira-hoist-pressure): Describe. * ira-costs.c (ira_set_pseudo_classes): New parameter. * ira.h: Update copyright dates. (ira_set_pseudo_classes): Update prototype. * haifa-sched.c (sched_init): Update call. * ira.c (ira): Update call. * regmove.c: Update copyright dates. (regmove_optimize): Update call. * loop-invariant.c: Update copyright dates. (move_loop_invariants): Update call. * gcse.c: (struct bb_data): New structure. (BB_DATA): New macro. (curr_bb, curr_reg_pressure): New static variables. (should_hoist_expr_to_dom): Rename from hoist_expr_reaches_here_p. Change parameter expr_index to expr. New parameters pressure_class, nregs and hoisted_bbs. Use reg pressure to determine the distance expr can be hoisted. (hoist_code): Use reg pressure to direct the hoist process. (get_regno_pressure_class, get_pressure_class_and_nregs) (change_pressure, calculate_bb_reg_pressure): New. (one_code_hoisting_pass): Calculate register pressure. Allocate and free data. gcc/testsuite/ChangeLog * testsuite/gcc.dg/hoist-register-pressure.c: New test. From-SVN: r192604
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