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; RUN: opt < %s -instcombine -S | grep "ret i32 0" ; PR4424 declare void @ext() define i32 @foo(i32 %ptr) { entry: %zero = sub i32 %ptr, %ptr ; <i32> [#uses=1] %div_zero = sdiv i32 %zero, ptrtoint (i32* getelementptr (i32, i32* null, i32 1) to i32) ; <i32> [#uses=1] ret i32 %div_zero }