tree 7b1dabab5a0522e0c84b2d5e1602a0361409e5e7
parent 539028487866a4c0ae0b49efc05c71ff415f372d
author Sanjay Patel <spatel@rotateright.com> 1547134043 +0000
committer Sanjay Patel <spatel@rotateright.com> 1547134043 +0000

[x86] fix remaining miscompile bug in horizontal binop matching (PR40243)

When we use the partial-matching function on a 128-bit chunk, we must 
account for the possibility that we've matched undef halves of the
original source vectors, so the outputs may need to be reset.

This should allow closing PR40243:
https://bugs.llvm.org/show_bug.cgi?id=40243


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@350830 91177308-0d34-0410-b5e6-96231b3b80d8