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      1 ; RUN: opt < %s -instcombine -S | FileCheck %s
      2 
      3 define double @mylog(double %x, double %y) {
      4 entry:
      5   %pow = call double @llvm.pow.f64(double %x, double %y)
      6   %call = call double @log(double %pow)
      7   ret double %call
      8 }
      9 
     10 ; CHECK-LABEL: define double @mylog(
     11 ; CHECK:   %pow = call double @llvm.pow.f64(double %x, double %y)
     12 ; CHECK:   %call = call double @log(double %pow)
     13 ; CHECK:   ret double %call
     14 ; CHECK: }
     15 
     16 define double @test3(double %x) {
     17   %call2 = call double @exp2(double %x)
     18   %call3 = call double @log(double %call2)
     19   ret double %call3
     20 }
     21 
     22 ; CHECK-LABEL: @test3
     23 ; CHECK:   %call2 = call double @exp2(double %x)
     24 ; CHECK:   %call3 = call double @log(double %call2)
     25 ; CHECK:   ret double %call3
     26 ; CHECK: }
     27 
     28 declare double @log(double)
     29 declare double @exp2(double)
     30 declare double @llvm.pow.f64(double, double)
     31