Commit 90e98549 authored by Ben Gamari's avatar Ben Gamari 🐢

llvmGen: Fix #14251

Fixes the calling convention for functions passing raw SSE-register
values by adding padding as needed to get the values in the right
registers. This problem cropped up when some args were unused an dropped
from the live list.

This folds together 2e23e1c7 and
73273be4 previously from @kavon.

Metric Increase:
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