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The underlying type of all plain enums in MSVC is 'int', even if the enumerator contains large 32-bit unsigned values or values greater than UINT_MAX. The only way to get a large or unsigned enum type is to request it explicitly with the C++11 strong enum types feature. However, since LLVM isn't C++11 yet, I had to add a conditional LLVM_ENUM_INT_TYPE to Compiler.h to control its usage. The motivating true positive for this change is compiling PointerIntPair with MSVC for win64. The PointerIntMask value is supposed to be pointer sized value of all ones with some low zeros. Instead, it's truncated to 32-bits! We are only saved later because it is sign extended back in the AND with int64_t, and we happen to want all ones. This silences lots of -Wmicrosoft warnings during a clang self-host targeting Windows. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191241 91177308-0d34-0410-b5e6-96231b3b80d8
Low Level Virtual Machine (LLVM) ================================ This directory and its subdirectories contain source code for the Low Level Virtual Machine, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments. LLVM is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. Please see the documentation provided in docs/ for further assistance with LLVM, and in particular docs/GettingStarted.rst for getting started with LLVM and docs/README.txt for an overview of LLVM's documentation setup. If you're writing a package for LLVM, see docs/Packaging.rst for our suggestions.