test/Transforms/InstCombine/2007-09-10-AliasConstFold.ll

   1 ; RUN: opt < %s -instcombine -S | grep icmp
   2 ; PR1646
   3
   4 @__gthrw_pthread_cancel = alias weak i32 (i32)* @pthread_cancel         ; <i32 (i32)*> [#uses=1]
   5 @__gthread_active_ptr.5335 = internal constant i8* bitcast (i32 (i32)* @__gthrw_pthread_cancel to i8*)          ; <i8**> [#uses=1]
   6 declare extern_weak i32 @pthread_cancel(i32)
   7
   8 define i1 @__gthread_active_p() {
   9 entry:
  10         %tmp1 = load i8** @__gthread_active_ptr.5335, align 4           ; <i8*> [#uses=1]
  11         %tmp2 = icmp ne i8* %tmp1, null         ; <i1> [#uses=1]
  12         ret i1 %tmp2
  13 }