[llvm-commits] [PATCH] [InstCombine] Allow for urem optimization to occur when the quotient is a power of two that is being zero extended.

[Michael Gottesman]

Currently LLVM optimizes urem appropriately for power of two quotients if
the numerator and quotient are the same size. On the other hand if the
quotient is a power of two which is zero extended, pattern matching fails
resulting in no optimizations occuring. This patch adds code to InstCombine
to properly match and handle this case.

Patch by David Majnemer. Test Case by me.

Please review,

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Michael