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Summary: Utility pass to remove gc.relocates created by rewrite statepoints for GC. With respect to safepoint verification, the IR generated would be incorrect, and cannot run as such. This would be a single transformation on the final optimized IR. The benefit of the pass is for easy analysis when the IRs are 'polluted' by too many gc.relocates. Added tests. test run: All RS4GC tests with -verify option. Local downstream tests on large IR files. This also works when the pointer being gc.relocated is another gc.relocate. Reviewers: sanjoy, reames Subscribers: beanz, mgorny, llvm-commits Differential Revision: https://reviews.llvm.org/D25096 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284855 91177308-0d34-0410-b5e6-96231b3b80d8