Joe Ellis 5a476987f7 [InstSimplify] Properly constrain {insert,extract}_subvector intrinsic fold ...

The previous rule:

   (insert_vector _, (extract_vector X, 0), 0) -> X

is not quite correct. The correct fold should be:

   (insert_vector Y, (extract_vector X, 0), 0) -> X
   where: Y is X, or Y is undef

This commit updates the pattern.

Reviewed By: peterwaller-arm, paulwalker-arm

Differential Revision: https://reviews.llvm.org/D102699

2021-05-21 10:05:03 +00:00

2.4 KiB

Raw Blame History

View Raw