llvm dev - Apr 2014 - [LLVMdev] fast isel question

If the FastiSel TargetSelectInstuction returns false, does that mean 
that the whole basic block needs to be done
without FastIsel?

Tia.

Reed

On Mon, Apr 21, 2014 at 1:45 PM, reed kotler <rkotler at mips.com> wrote:
> If the FastiSel TargetSelectInstuction returns false, does that mean that
> the whole basic block needs to be done
> without FastIsel?
>
No. FastISel is used as much as possible. Once it fails on some
instruction, this instruction and the rest in the BB go through
SelectionDAG. Skim through SelectionDAGISel::SelectAllBasicBlocks - the
comments there explain what's going on pretty reasonably.

Eli
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20140422/11f3235b/attachment.html>