[PATCH] D120666: [docs] Add note about interaction between clang plugins and -clear-ast-before-backend

[Nico Weber via Phabricator via cfe-commits]

thakis added inline comments.


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Comment at: clang/docs/ClangPlugins.rst:209
+codegen action automatically turns off ``-clear-ast-before-backend``, which
+saves peak memory by clearing the Clang AST after generating IR and before
+running IR optimizations. Use ``CmdlineBeforeMainAction`` or
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this sounds like plugins turning off that flag saves memory


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  https://reviews.llvm.org/D120666/new/

https://reviews.llvm.org/D120666