; RUN: opt < %s -aa-pipeline=basic-aa -passes=gvn,instcombine -S | FileCheck %s ; PR1600 declare i16 @llvm.cttz.i16(i16, i1) define i32 @test(ptr %P, ptr %Q) { ; CHECK: ret i32 0 %A = load i16, ptr %Q ; [#uses=1] %x = load i32, ptr %P ; [#uses=1] %B = call i16 @llvm.cttz.i16( i16 %A, i1 true ) ; [#uses=1] %y = load i32, ptr %P ; [#uses=1] store i16 %B, ptr %Q %z = sub i32 %x, %y ; [#uses=1] ret i32 %z }