LuaJIT 2 bug with constants passed to IRCALL functions

[Erik Lindroos <gliptic@...>]

Hi,

I found a bug in the JIT that happens when passing numeric constants to e.g. sinh. This happens only on x64, tested on Windows with VC++.

Here's a snippet that reproduces it:

local sum = 0

for i=1,100 do

sum = sum + math.sinh(2)

end

assert(math.abs(math.sinh(2)*100 - sum) < 0.1)

It appears the JIT fails to assign the constant to the xmm0 register in the call to sinh.

Regards,

Erik Lindroos