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      1 ; RUN: opt < %s -reassociate -S | FileCheck %s
      2 
      3 define i32 @test1(i32 %A) {
      4 ; CHECK-LABEL: test1
      5 ; CHECK: ret i32 0
      6   %X = add i32 %A, 1
      7   %Y = add i32 %A, 1
      8   %r = sub i32 %X, %Y
      9   ret i32 %r
     10 }
     11