3bdf9a0880
Currently iterators over EquivalenceClasses will iterate over std::set, which guarantees the order specified by the comperator. Unfortunately in many cases, EquivalenceClasses are used with pointers, so iterating over std::set of pointers will not be deterministic across runs. There are multiple places that explicitly try to sort the equivalence classes before using them to try to get a deterministic order (LowerTypeTests, SplitModule), but there are others that do not at the moment and this can result at least in non-determinstic value naming in Float2Int. This patch updates EquivalenceClasses to keep track of all members via a extra SmallVector and removes code from LowerTypeTests and SplitModule to sort the classes before processing. Overall it looks like compile-time slightly decreases in most cases, but close to noise: https://llvm-compile-time-tracker.com/compare.php?from=7d441d9892295a6eb8aaf481e1715f039f6f224f&to=b0c2ac67a88d3ef86987e2f82115ea0170675a17&stat=instructions PR: https://github.com/llvm/llvm-project/pull/134075
C language Family Front-end
Welcome to Clang.
This is a compiler front-end for the C family of languages (C, C++ and Objective-C) which is built as part of the LLVM compiler infrastructure project.
Unlike many other compiler frontends, Clang is useful for a number of things beyond just compiling code: we intend for Clang to be host to a number of different source-level tools. One example of this is the Clang Static Analyzer.
If you're interested in more (including how to build Clang) it is best to read the relevant websites. Here are some pointers:
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Information on Clang: http://clang.llvm.org/
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Building and using Clang: http://clang.llvm.org/get_started.html
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Clang Static Analyzer: http://clang-analyzer.llvm.org/
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Information on the LLVM project: http://llvm.org/
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If you have questions or comments about Clang, a great place to discuss them is on the Clang forums:
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If you find a bug in Clang, please file it in the LLVM bug tracker: