[PATCH] D27051: Propagate NumRegisterParameters to Backend

[Michael Kuperstein via llvm-commits]

mkuper added a comment.

So, I remember back when I implemented the MCU ABI rnk and I discussed this, and didn't really reach a definitive conclusion.

This would make -mregparm behavior match GCC, but would be an ABI break for clang.
You may want to surface this on llvm-dev, and check that doesn't come as a surprise to anyone.


https://reviews.llvm.org/D27051