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Hi, I'm interested in implementing an InstCombine optimization that I discovered and verified with Alive-NJ (with the help of the authors of Alive-NJ). The optimization is described in Alive-NJ format as follows: Name: xor->fsub Pre: isSignBit(C) %x = bitcast %A %y = xor %x, C %z = bitcast %y => %z = fsub -0.0, %A Effectively the optimization targets code that casts a float to an int

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