tree 70f516f510b4d352b96d496e6bcc3f0687c0e32b
parent 3eb36b48dbd28d1ddcfb55a1310297fd23164349
author Fraser Cormack <fraser@codeplay.com> 1613553958 +0000
committer Copybara-Service <copybara-worker@google.com> 1613734018 -0800

[SVE][CodeGen] Expand SVE MULH[SU] and [SU]MUL_LOHI nodes

This patch fixes a codegen crash introduced in fde24661718c, where the
DAGCombiner started generating optimized MULH[SU] or [SU]MUL_LOHI nodes
unless the target opted out. The AArch64 backend cannot currently select
any of these nodes, so ensure that they are not generated in the first
place.

This issue was raised by @huihuiz in D94501.

Reviewed By: paulwalker-arm

Differential Revision: https://reviews.llvm.org/D96849

GitOrigin-RevId: 0176fecfbcd6b867fd31d7b85cc748220150babc