[PATCH] Revert 221429 and fix bug in TargetLowering::SimplifyDemandedBits

[Gil Rapaport]

Hi Quentin,

Ahh, right, removing the SHRUNK_BLEND node would re-invalidate the booleaness property of the VBLEND condition.
I'll prepare a new patch which keeps the SHRUNK_BLEND node and only fixes the DemandedMask bug (to protect other callers to SimplifyDemandedBits). I'll also look into narrowing this optimization to skip cases where the sext-in-reg could provably be removed on account of all bits already being set.

Thanks,
Gil


http://reviews.llvm.org/D6949

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