[LoopIdiomRecognize] Turn two uncheck dyn_casts into regular casts.

These are casts on users of a PHINode to Instruction. I think since PHINode is an Instruction any users would also be Instructions. At least a cast will give us an assertion if its wrong.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@331498 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed