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On Tue, Dec 16, 2008 at 3:36 PM, Daniel M Gessel <gessel at apple.com> wrote: > I'm working on a Target that only uses the 5 lsbs of the shift amount. Okay, that's quite common... x86 is the same. > I only have 32 bit registers, no 64 bit, so 64 bit math is emulated, > LLVM doing the transformations whenever I can get it to. x86 is the same. > I think I'm seeing a

I'm working on a Target that only uses the 5 lsbs of the shift amount. I only have 32 bit registers, no 64 bit, so 64 bit math is emulated, LLVM doing the transformations whenever I can get it to. I think I'm seeing a case where it ultimately looks like a standard multiword shift (from e.g. Hacker's Delight) is being inline expanded that assumes at least 6 bits of the shift is

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