[LLVMdev] X86TarIgetLowering::LowerToBT

[Chris Sears]

Thanks Kevin, Sanjay sent me the icc out put.

icc generates testq for 0-30 and btq for 31-63.
That seems like a small bug in the bit 31 case.

Why is it generating testq rather than test for bits 0-30?
Does the assembler relax that into test, no REX prefix?

I'm mostly interested in the X86_64 (Intel64?) case.
Reading the man pages, icc and llvm -Os are similar.
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