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* ifcvt.c (dead_or_predicable): Use df_simulate_find_defs and
authorbernds <bernds@138bc75d-0d04-0410-961f-82ee72b054a4>
Thu, 22 Apr 2010 10:42:21 +0000 (10:42 +0000)
committerbernds <bernds@138bc75d-0d04-0410-961f-82ee72b054a4>
Thu, 22 Apr 2010 10:42:21 +0000 (10:42 +0000)
commitf1565c91fb52479b661892f111a74d830df15233
tree9189a0396519f211744af9abcdd1e55ace0a2d12
parent60cc67651dd7b14ff931b856fe791193168844e0
* ifcvt.c (dead_or_predicable): Use df_simulate_find_defs and
df_simulate_find_noclobber_defs as appropriate.  Keep track of an
extra set merge_set_noclobber, and use it to relax the final test
slightly.
* df.h (df_simulate_find_noclobber_defs): Declare.
* df-problems.c (df_simulate_find_defs): Don't ignore partial or
conditional defs.
(df_simulate_find_noclobber_defs): New function.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@158639 138bc75d-0d04-0410-961f-82ee72b054a4
gcc/ChangeLog
gcc/df-problems.c
gcc/df.h
gcc/ifcvt.c