d9a704cd40
The correct way to compare gc.Types is Eqtype, rather than pointer equality. Introduce an Equal method for ssa.Type to allow us to use it. In the cse pass, use a type's string to build the coarse partition, and then use Type.Equal during refinement. This lets the cse pass do a better job. In the ~20% of the standard library that SSA can compile, the number of common subexpressions recognized by the cse pass increases from 27,550 to 32,199 (+17%). The number of nil checks eliminated increases from 75 to 115 (+50%). Change-Id: I0bdbfcf613ca6bc2ec987eb19b6b1217b51f3008 Reviewed-on: https://go-review.googlesource.com/11451 Reviewed-by: Keith Randall <khr@golang.org> |
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