[GISel]: Add support for CSEing continuously during GISel passes.

https://reviews.llvm.org/D52803

This patch adds support to continuously CSE instructions during
each of the GISel passes. It consists of a GISelCSEInfo analysis pass
that can be used by the CSEMIRBuilder.

llvm-svn: 351283
34 files changed
tree: cb33a52687ccae37e6014e6eff2c4e9d2837e40d
  1. clang/
  2. clang-tools-extra/
  3. compiler-rt/
  4. debuginfo-tests/
  5. libclc/
  6. libcxx/
  7. libcxxabi/
  8. libunwind/
  9. lld/
  10. lldb/
  11. llgo/
  12. llvm/
  13. openmp/
  14. parallel-libs/
  15. polly/
  16. pstl/
  17. .arcconfig
  18. README.md
README.md

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