When generating code for a shift loop, check the shift amount against the literal value 0, not R0 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@304284 91177308-0d34-0410-b5e6-96231b3b80d8
This lets us do bit rotations of variable amount. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301794 91177308-0d34-0410-b5e6-96231b3b80d8