tree 2c3f4a0096d53bda47abe98f18cc67d1f581fe7f
parent 29dd0aa5bb94c654bd5591b3c8bcbe066c8bb51f
author Simon Pilgrim <llvm-dev@redking.me.uk> 1545072223 +0000
committer Simon Pilgrim <llvm-dev@redking.me.uk> 1545072223 +0000

[TargetLowering] Add DemandedElts mask to SimplifyDemandedBits (PR40000)

This is an initial patch to add the necessary support for a DemandedElts argument to SimplifyDemandedBits, more closely matching computeKnownBits and to help improve vector codegen.

I've added only a small amount of the changes necessary to get at least one test to update - a lot more can be done but I'd like to add these methodically with proper test coverage, at the same time the hope is to slowly move some/all of SimplifyDemandedVectorElts into SimplifyDemandedBits as well.

Differential Revision: https://reviews.llvm.org/D55768

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@349374 91177308-0d34-0410-b5e6-96231b3b80d8