2007-07-01 Richard Sandiford <richard@codesourcery.com>

2007-07-01  Richard Sandiford  <richard@codesourcery.com>

	Unreverting Richard's Revert of:

	2007-06-27  Richard Sandiford  <richard@codesourcery.com>

	* dce.c (deletable_insn_p_1): New function, split out from...
	(deletable_insn_p): ...here.  Only treat bare USEs and CLOBBERs
	specially, not those inside PARALLELs.  Remove BODY argument
	and adjust recursive call accordingly.
	(prescan_insns_for_dce): Update call to delete_insn_p.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@126168 138bc75d-0d04-0410-961f-82ee72b054a4