From 14179673e27b3a0620f4dfd92fb40e8f1c38605a Mon Sep 17 00:00:00 2001 From: Kristina Brooks Date: Tue, 12 Mar 2019 15:44:18 +0000 Subject: [PATCH] [Docs] Add note about legacy PM to Ch4 of tutorial Add a note about legacy FunctionPassManager to the LLVM tutorial. It seems to confuse some people, worth adding a warning to the tutorial to elaborate and suggest using `llvm::legacy::FunctionPassManager` for now. Not a perfect solution but hopefully will avoid confusion in the meantime. Differential Revision: https://reviews.llvm.org/D59258 llvm-svn: 355930 --- llvm/docs/tutorial/LangImpl04.rst | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/llvm/docs/tutorial/LangImpl04.rst b/llvm/docs/tutorial/LangImpl04.rst index 8927a91..bdd21d6 100644 --- a/llvm/docs/tutorial/LangImpl04.rst +++ b/llvm/docs/tutorial/LangImpl04.rst @@ -94,6 +94,14 @@ use, in the form of "passes". LLVM Optimization Passes ======================== +.. warning:: + + Due to the transition to the new PassManager infrastructure this tutorial + is based on ``llvm::legacy::FunctionPassManager`` which can be found in + `LegacyPassManager.h `_. + For the purpose of the this tutorial the above should be used until + the pass manager transition is complete. + LLVM provides many optimization passes, which do many different sorts of things and have different tradeoffs. Unlike other systems, LLVM doesn't hold to the mistaken notion that one set of optimizations is right for -- 2.7.4