[LLVMdev] Using branches in lowered operations

[Evan Cheng]

See X86InstrInfo.td
let usesCustomInserter = 1, isTwoAddress = 0, Defs = [EFLAGS] in
def CMOV_GR8 : I<0, Pseudo,

This creates a CMOV_GR8 pseudo instruction at isel time which can be expanded during scheduling time.

Evan

On Dec 10, 2009, at 11:46 AM, Javier Martinez wrote:

> Hello,
> 
> My expansion for an operation uses if and loops. How do I introduce
> branches in the target lowering stage? Do I have to create basic blocks,
> add the instructions to them and and add them to the machine function's
> basic block list?
> 
> Thanks,
> Javier
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