[LLVMdev] 128-bit PXOR requires SSE2

[Craig Topper]

I suspect this would have been fixed by r*143996*. Though that wasn't the
intention of that commit based on the commit comments.

On Fri, Jan 20, 2012 at 2:55 PM, Eli Friedman <eli.friedman at gmail.com>wrote:

> On Fri, Jan 20, 2012 at 2:47 PM, Nicolas Capens
> <nicolas.capens at gmail.com> wrote:
> > Hi all,
> >
> > I think I found a bug in LLVM 3.0: When compiling for a target without
> > SSE2 support, there were some 128-bit PXOR instructions in the generated
> > code.
> >
> > I traced it down to the following definition in X86InstrSSE.td:
> >
> >   def FsFLD0SS : I<0xEF, MRMInitReg, (outs FR32:$dst), (ins), "",
> >                    [(set FR32:$dst, fp32imm0)]>,
> >                    Requires<[HasSSE1]>, TB, OpSize;
> >
> > I tried replacing the HasSSE1 with a HasSSE2 but that didn't do the
> > trick. I noticed that TOT has a different definition and I tried
> > substituting that as well but again no luck. Is there a simple way to
> > make it work with LLVM 3.0 or should I consider updating to a later
> version?
>
> That particular issue doesn't look familiar; if you can reproduce with
> trunk, please file a bug report.
>
> -Eli
>
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-- 
~Craig
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