f8f41c3fcd
On 64-bit target, when doing i64 SELECT_CC where one of the comparison operands is a constant zero, try to fold the compare and MOVcc into a MOVr instruction. For all integers, EQ and NE comparison are available, additionally for signed integers, GT, GE, LT, and LE is also available. Reviewed By: arsenm Differential Revision: https://reviews.llvm.org/D138922