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* reg-stack.c (propagate_stack): Always copy the source stack to the destination. This routine is now only called when this is safe. (better_edge): New function split out from convert_regs_1 to determine which of two edges is better to propagate across. (convert_regs_1): We need only search for a best edge if the stack layout hasn't been defined yet. Use better_edge to help find beste. No longer traverse unnecessary edges. From-SVN: r100323
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