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5c71858076
Move type promotion of the size of the array allocation to the end of `simplifyAllocaArraySize()`. This avoids promoting the type of the array size if it's a `ConstantInt`, since the next -instcombine iteration will drop it to a scalar allocation anyway. Similarly, this avoids promoting the type if it's an `UndefValue`, in which case the alloca gets RAUW'ed. This is NFC when considered over the lifetime of -instcombine, since it's just reducing the number of iterations needed to reach fixed point. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232201 91177308-0d34-0410-b5e6-96231b3b80d8
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