Speculation in sgicc

[T Vinod Kumar Gupta <tvinod@xxxxxxxxxxxx>]

Hello,
        I am looking into the (control) speculation abilities of the sgi
compiler. I was looking into the gcm.cxx file in be/cg.
        There is some piece of code to decide to do speculation but it
seems that in actual practice, speculation is never done. I tried it with
one of the spec2000 applications as well. 
Also, I remembered to use the -O3 option.

        Is control speculation properly implemented in the compiler??
        If yes, are there some severe constraints??
        
Thanks in advance,
Vinod

Graduate Student
Dept. of ECE,
University of Maryland, College Park