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      1 ; RUN: opt < %s -instcombine -S | FileCheck %s
      2 
      3 define float @mytan(float %x) {
      4 entry:
      5   %call = call float @atanf(float %x)
      6   %call1 = call float @tanf(float %call) 
      7   ret float %call1
      8 }
      9 
     10 ; CHECK-LABEL: define float @mytan(
     11 ; CHECK:   %call = call float @atanf(float %x)
     12 ; CHECK-NEXT:   %call1 = call float @tanf(float %call)
     13 ; CHECK-NEXT:   ret float %call1
     14 ; CHECK-NEXT: }
     15 
     16 declare float @tanf(float)
     17 declare float @atanf(float)
     18