This is a cherry pick of upstream LLVM r340889.

Bug: b/74603866
Change-Id: I9d0fd16d20d690b5c930e0a915dad8247890fc38
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/46048Tested-by: Peter Collingbourne <pcc@google.com>
Presubmit-Ready: Peter Collingbourne <pcc@google.com>
Kokoro-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>