------- Comment #1 from rearnsha at gcc dot gnu dot org 2006-08-29 14:41
-------
The only reason for keeping the old predication-based code is that it can
handle an important case that the generic code cannot. Specifically, it can
conditionally skip a call to a function: this is not normally predicable since
it clobbers the instruction codes. However, the arm-specific code knows that
it is safe to do this iff the call instruction is the last instruction in the
predicated sequence.
If the MI code could be made to handle cases where the predicate register was
clobbered by the last predicable instruction, then the need to keep the
existing MD code could disappear in a puff of smoke.
--
rearnsha at gcc dot gnu dot org changed:
What |Removed |Added
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CC| |rearnsha at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28872
