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7055f496c7
The i586 targets on x86 are defined to be 32-bit and lacking in sse/sse2 unlike the i686 target which has sse2 turned on by default. I was mostly curious what would happen when turning on this target, and it turns out quite a few tests failed! Most of the tests here had to do with calling functions with ABI mismatches where the callee wasn't `#[inline(always)]`. Various pieces have been updated now and we should be passing all tests. Only one instruction assertion ended up changing where the function generates a different instruction with sse2 ambiently enabled and without it enabled.