Temporarily revert "Recommit r328307: [IPSCCP] Use constant range information for comparisons of parameters." as it's causing miscompiles.

A testcase was provided in the original review thread.

This reverts commit r336098.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@336877 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed