backport 3cb7e7bf959dcd3b8080986c62e10a75c7af43f0 to 10.0.1

[yonghong-song]

Bugzilla Link	45625
Resolution	FIXED
Resolved on	May 06, 2020 20:00
Version	unspecified
OS	Linux
Blocks	#44654
CC	@tstellar
Fixed by commit(s)	3cb7e7b 1d1469a

Extended Description

The following commit in llvm 11 trunk fixed a BPF code generation bug.

commit 3cb7e7b
Author: Yonghong Song yhs@fb.com
Date: Sun Apr 19 15:19:06 2020 -0700

BPF: fix a CORE optimization bug

I would like to backport to 10.0.1.

[yonghong-song]

assigned to @4ast

[tstellar]

Alexei, Is this Ok to backport?

https://reviews.llvm.org/rG3cb7e7bf959dcd3b8080986c62e10a75c7af43f0

[4ast]

yes. Though it's a corner cases I think it's worth backporting. Thanks

[tstellar]

Merged: 1d1469a