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      1 ; RUN: llc < %s -march=x86 -tailcallopt | FileCheck %s
      2 
      3 declare i32 @putchar(i32)
      4 
      5 define fastcc i32 @checktail(i32 %x, i32* %f, i32 %g) nounwind {
      6 ; CHECK: checktail:
      7         %tmp1 = icmp sgt i32 %x, 0
      8         br i1 %tmp1, label %if-then, label %if-else
      9 
     10 if-then:
     11         %fun_ptr = bitcast i32* %f to i32(i32, i32*, i32)* 
     12         %arg1    = add i32 %x, -1
     13         call i32 @putchar(i32 90)       
     14 ; CHECK: jmpl *%e{{.*}}
     15         %res = tail call fastcc i32 %fun_ptr( i32 %arg1, i32 * %f, i32 %g)
     16         ret i32 %res
     17 
     18 if-else:
     19         ret i32  %x
     20 }
     21 
     22 
     23 define i32 @main() nounwind { 
     24  %f   = bitcast i32 (i32, i32*, i32)* @checktail to i32*
     25  %res = tail call fastcc i32 @checktail( i32 10, i32* %f,i32 10)
     26  ret i32 %res
     27 }
     28