Use intrinsic pattern to make a simpler match
Use intrinsic pattern to make a simpler match

This is a follow-on to r236740 where I took Andrea's advice
in D9504 to remove a redundant pattern...except that I removed
the wrong pattern!

AFAICT, there is no change in the final code produced because 
subsequent passes would clean up the extra instructions created
by the more complicated pattern.



git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@236743 91177308-0d34-0410-b5e6-96231b3b80d8

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