Re: LuaJIT optimization bug?
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- Subject: Re: LuaJIT optimization bug?
- From: Pierre Chapuis <catwell@...>
- Date: 2011年8月17日 15:25:07 +0200
There's definitely something wrong with the JIT here.
The line where I call bit_set_1 looks like this:
bit_set_1(_bset,_byte,_bit)
I tried to add an assertion afterwards:
bit_set_1(_bset,_byte,_bit)
assert(bit_get(_bset,_byte,_bit) == 1)
This assertion is never triggered, and *the code works*
when it's here (ie. it gives the expected output).
The bit_get function looks like this:
local bit_get = function(_bset,_byte,_bit)
return band(brshift(_bset[_byte],7-_bit),1)
end
PS: in real code the bit_ functions are in a separate module,
I have abstracted that in snippets to make them simpler.
--
Pierre 'catwell' Chapuis