* i386.c (size_cost): New static variable.
(override_function): Use size_cost when -Os is specified.
* i386.c (ix86_expand_prologue): Set use_fast_prologue_epilogue
properly; Use current_function_calls_eh_return.
(ix86_expand_epilogue): Avoid dummy optimize_size tests;
use leave to avoid depdendancy chain.
* local-alloc.c (update_equiv_regs): Use CFG to iterate over INSN stream;
get BB loop_depth instead of computing it from LOOP notes.
* reg-stack.c (subst_stack_reg_pat): Handle reversal of conditional moves.
From-SVN: r45415
