When compiling with `-march=armv9-a+nosve` we found that Clang still defines the `__ARM_FEATURE_SVE2` macro, which is explicitly set in `setArchFeatures` when compiling for armv9-a. After some experimenting, I found out that the list of features passed into `AArch64TargetInfo::handleTargetFeatures` has already been expanded and takes into account `+no[feature]` and has already expanded features like `armv9-a`. From that I conclude that `setArchFeatures` is no longer required.
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: