[LLVMdev] Cannot Select ConstantFP on x86

[David Greene]

On Thursday 25 September 2008 19:12, Chris Lattner wrote:
> On Sep 24, 2008, at 5:11 PM, David Greene wrote:
> > I just ran into this today with x86-64:
> >
> > Cannot yet select: 0x3cbc180: f64 = ConstantFP <1>
> >
> > As far as I can tell, DAGCombiner comes along and sees an sint_to_fp
> > of the
> > constant 1 and hapilly folds it into a ConstantFP<1>.  ISel then
> > blows up
> > because there's no pattern for it.
> >
> > Does this look familiar to anyone?  I don't see any relevant bugs in
> > the
> > database.
>
> Do you have a testcase?  It sounds like something that would be easy
> to fix.

I have a fix (yes, it was trivial).  I'll have to see about a testcase as it's 
proprietary code.

                                                   -Dave