Sanjay Patel 69faf464ed [InstCombine] allow more shuffle folds using safe constants ...

getSafeVectorConstantForBinop() was calling getBinOpIdentity() assuming
that the constant we wanted was operand 1 (RHS). That's wrong, but I
don't think we could expose a bug or even a suboptimal fold from that
because the callers have other guards for any binop that would have
been affected.

llvm-svn: 336617

2018-07-09 23:22:47 +00:00

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