Reapply "[clang][SPIR-V] Implement -fspv-preserve-interface (#196404)" (#204249) This reverts commit 6746898d2bfc086947d86715e065f8dbf74e9690. [clang][SPIR-V] Re-land -fspv-preserve-interface (#196404) This had been reverted in #202558 due to a missing symbol (llvm::removeFromUsedLists). That symbol is now available in main. @jmmartinez @jplehr could you please review? I did not need to modify the original PR #196404 . As I described in https://github.com/llvm/llvm-project/pull/196404#issuecomment-4661219367, the build failure on `main` was not due to it. Tested locally. Will watch the bots once the PR is created.
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