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Author SHA1 Message Date
Juergen Ributzka
27d8a0df16 [FastISel][AArch64] Fold compare with zero and branch into CBZ and CBNZ. 
This takes advanatage of the CBZ and CBNZ instruction to further optimize the
common null check pattern into a single instruction.

This is related to rdar://problem/18358882.

llvm-svn: 217972
 2014-09-17 18:05:34 +00:00