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...down to a 64bit space. To be on the safe side, my patch is mapping them down to a 32bit space, but I am squishing them too much on the lower end. So regions of the CFG that before had distinct temperatures are now showing up with frequency == 1. I need a better smoother for the mapping from the Scale64 floats down to 64bit (or 32bit) integers. Diego.

I've been trying to get rid of the loop scale limiting problem during BFI. Initially, this was saturating frequencies to the max side of the scale, so a double nested loop would get max frequencies in all the blocks (e.g., llvm/test/CodeGen/X86/lsr-i386.ll). This made the inner loop no hotter than the outer loop, so block placement would not bother aligning them. In convertFloatingToInteger()