[tree-ssa] Make remove_phi_arg_num useful.

[Steven Bosscher]

Hi,

It's convenient to use remove_phi_arg_num() instead of remove_phi_arg()
when you've already identified the edge for the PHI arg.  But without
this patch, the out-of-ssa pass seems to get confused.

Bootstrapped and tested, OK?

Gr.
Steven


2003-08-06  Steven Bosscher  <steven@gcc.gnu.org>

	* tree-dfa.c (remove_phi_arg):  When the PHI no longer has
	arguments, don't remove it here, but do so...
	(remove_phi_arg_num): ...from here.

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