tree cb356b8539f1c8ec399a8e8856fdca4d1c2fd559
parent 75cbca09a42dd2ea9f38d8f4bb4c3f3630ebade5
author Craig Topper <craig.topper@intel.com> 1571119811 +0000
committer Craig Topper <craig.topper@intel.com> 1571119811 +0000

[X86] Don't check for VBROADCAST_LOAD being a user of the source of a VBROADCAST when trying to share broadcasts.

The only things VBROADCAST_LOAD uses is an address and a chain
node. It has no vector inputs.

So if its a user of the source of another broadcast that could
only mean one of two things. The other broadcast is broadcasting
the address of the broadcast_load. Or the source is a load and
the use we're seeing is the chain result from that load. Neither
of these cases make sense to combine here.

This issue was reported post-commit r373871. Test case has not
been reduced yet.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@374862 91177308-0d34-0410-b5e6-96231b3b80d8