[Bug middle-end/20714] emit_no_conflict_block does invalid reordering

[amylaar at gcc dot gnu dot org]

------- Additional Comments From amylaar at gcc dot gnu dot org  2005-04-01 15:20 -------
Created an attachment (id=8507)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=8507&action=view)
proposed patch

This implements a similar dependency check as in emit_libcall_block,
except that we might have to consider multiple sets / clobbers.
This also fixes the bogosity of checking only the first set for
setting part of target, and looking at the SET_DEST of USEs and CLOBBERs.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20714