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7697370adf
As Jakob pointed out in his review of r177423, having a shared ZERO register between the 32- and 64-bit register classes causes this odd G8RC_NOX0_and_GPRC_NOR0 class to be created. As recommended, this adds a ZERO8 register which differentiates the 32- and 64-bit zeros. No functionality change intended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177683 91177308-0d34-0410-b5e6-96231b3b80d8
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