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The current VSX feature for PowerPC specifies availability of the VSX instructions added with the 2.06 architecture version. With 2.07, the architecture adds new instructions to both the Category:Vector and Category:VSX instruction sets. Additionally, unaligned vector storage operations have improved performance. This patch adds a feature to provide access to the new instructions and performance capabilities of Power8. For compatibility with GCC, the feature is controlled via a new -mpower8-vector switch, and the feature causes the __POWER8_VECTOR__ builtin define to be generated by the preprocessor. There is a companion patch for cfe being committed at the same time. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219501 91177308-0d34-0410-b5e6-96231b3b80d8
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