Hal Finkel b998915ee1 Swap PPC isel operands to allow for 0-folding
The PPC isel instruction can fold 0 into the first operand (thus eliminating
the need to materialize a zero-containing register when the 'true' result of
the isel is 0). When the isel is fed by a bit register operation that we can
invert, do so as part of the bit-register-operation peephole routine.

llvm-svn: 202469
2014-02-28 06:11:16 +00:00
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