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      1 ; RUN: opt < %s -instcombine -S | grep zext
      2 
      3 ; Never merge these two conversions, even though it's possible: this is
      4 ; significantly more expensive than the two conversions on some targets
      5 ; and it causes libgcc to be compile __fixunsdfdi into a recursive 
      6 ; function.
      7 define i64 @test(double %D) {
      8         %A = fptoui double %D to i32            ; <i32> [#uses=1]
      9         %B = zext i32 %A to i64         ; <i64> [#uses=1]
     10         ret i64 %B
     11 }
     12 
     13