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Yes, although I make fun of LLVM for the non-optimal code, I really doubt anyone would consider them 'bugs' -- and I did not. They aren't bugs, they are just optimizations that we haven't found a good way to automatically identify yet.

Though, it does seem to always store the old stack pointer in r7, even though it doesn't restore from r7, and even though my inline assembly block specifies r7 on the clobber list. That might be a bug, but it's a single 'add', so who cares.

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