[LLVMdev] What is the Use of "Implicit EFLAGS" in TableGen

[Shashidhar]

Hi,

     In the Table Gen format of defining Instructions for X86 
architecture, some of the instruction patterns has both the dag 
expression "(implicit EFLAGS)" as well as the definition "Defs = 
[EFLAGS]". What is the difference between these two? Cant the 
Instruction Selector consider the Defs list when doing pattern match. I 
am confused when to use (implicit EFLAGS) expression.

-- 
Thanks and Regards,
Shashidhar