Please backport 5b4819e337c662fad7176a1d8e7b95a94f199290 to 21.x

[mgorny]

665e875 was backported to 21.x without the followup fix for 32-bit architectures.

/cherry-pick 5b4819e

[llvmbot]

@llvm/issue-subscribers-clang-codegen

Author: Michał Górny (mgorny)

665e875 was backported to 21.x without the followup fix for 32-bit architectures.

/cherry-pick 5b4819e

[nikic]

Already has a PR here: #159209

[mgorny]

Ah, sorry. I was searching using the full commit hash 🤦.

[llvmbot]

/pull-request #160680