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      1 ; RUN: opt -dce -S < %s | FileCheck %s
      2 ; RUN: opt -passes=dce -S < %s | FileCheck %s
      3 
      4 ; CHECK-LABEL: @test
      5 define void @test() {
      6 ; CHECK-NOT: add
      7   %add = add i32 1, 2
      8 ; CHECK-NOT: sub
      9   %sub = sub i32 %add, 1
     10   ret void
     11 }
     12