1; RUN: opt < %s -instcombine -S | grep "ret i32 0"
2; PR4424
3declare void @ext()
4
5define i32 @foo(i32 %ptr) {
6entry:
7        %zero = sub i32 %ptr, %ptr              ; <i32> [#uses=1]
8        %div_zero = sdiv i32 %zero, ptrtoint (ptr getelementptr (i32, ptr null,
9i32 1) to i32)             ; <i32> [#uses=1]
10        ret i32 %div_zero
11}
12
13