From comment about this:
Adjust alignment for HLSL rules
TODO: make this consistent in early phases of code: adjusting this late means inconsistencies with earlier code, which for reflection is an issue.
Until reflection is brought in sync with these adjustments, don't apply to $Global,
which is the most likely to rely on reflection, and least likely to rely
implicit layouts.
The prior decomposition of isfinite was not setting the return type on the
sequence node. (Sequence was used because there's an internal temporary
to avoid the complex rvalue problem).
