[X86] When applying the shuffle-to-zero-extend transformation on floating point, bitcast to integer first.

Fix issue described in PR34577.

Differential Revision: https://reviews.llvm.org/D37803

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@313256 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed