[LLVMdev] 128-bit PXOR requires SSE2

[Nicolas Capens]

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?

Thanks,
Nicolas