[RISCV] Add support for RVC HINT instructions

The hint instructions are enabled by default (if the standard C extension is 
enabled). To disable them pass -mattr=-rvc-hints.

Differential Revision: https://reviews.llvm.org/D62592

llvm-svn: 369528
11 files changed
tree: 030c8dd7701c75dea90f9c91100f44ab22c88ca5
  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. .clang-format
  19. .clang-tidy
  20. .gitignore
  21. README.md
README.md

The LLVM Compiler Infrastructure

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.