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; RUN: opt < %s -basicaa -gvn -instcombine -S | grep {ret i32 0} ; PR4189 @G = external constant [4 x i32] define i32 @test(i8* %p, i32 %i) nounwind { entry: %P = getelementptr [4 x i32]* @G, i32 0, i32 %i %A = load i32* %P store i8 4, i8* %p %B = load i32* %P %C = sub i32 %A, %B ret i32 %C }