Backport f55ab6f90b7317a6bb85303a6102702bdae1199e to 10.0

[nikic]

Bugzilla Link	44702
Resolution	FIXED
Resolved on	Feb 19, 2020 05:23
Version	10.0
OS	Linux
Blocks	#43900
CC	@adrian-prantl,@zmodem,@JDevlieghere

Extended Description

Please backport https://reviews.llvm.org/rGf55ab6f90b7317a6bb85303a6102702bdae1199e to the LLVM 10.x branch.

We've recently found that this issue affects Rust in some cases (ref rust-lang/rust#48300 (comment)).

[zmodem]

The patch doesn't apply cleanly on the branch.

Adrian, can you please help cherry-pick this (with -x) and push it to the 10.x branch?

[zmodem]

It applies if I take 7b0d58e first.

Pushed to 10.x as 7751f0c and cab8152