Revert "[ARM] Allow signed icmps in ARMCodeGenPrepare"

use-after-poison in check-llvm under asan

This reverts commit r339755.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@339806 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed