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9d55e2c85e
This fixes znver1 so that it properly enables CMPXHG8B. We can probably remove explicit CMPXCHG8B from CPUs that also have CMPXCHG16B, but keeping this simple to allow cherry pick to 9.0. Fixes PR42935. llvm-svn: 368324
The LLVM Compiler Infrastructure
This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.