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llvm/powerpc64*: fix broken binaries generated by clang12

Description

llvm/powerpc64*: fix broken binaries generated by clang12

Amends LLVM commit 2518433f861fcb877d0a7bdd9aec1aec1f77505a that
was pointed as the source of regression on LLVM12.

This affects powerpc64*, making binaries crash with segmentation fault
due to bad code generation around "__stack_chk_guard"

Root cause and/or proper fix is under investigation by:

https://bugs.llvm.org/show_bug.cgi?id=51590

Reviewed by: dim
MFC after: 2 days
Sponsored by: Instituto de Pesquisas Eldorado (eldorado.org.br)
Differential Revision: https://reviews.freebsd.org/D31698

(cherry picked from commit 9a4d48a645a7a3ebee05fae25afd154a132b638a)

Details

Provenance
alfredoAuthored on Aug 27 2021, 2:47 PM
Reviewer
dim
Differential Revision
D31698: powerpc64*: fix for broken binaries generated by llvm12
Parents
R10:7e583075a411: virtio-modern: fix PCI common read/write functions on big endian targets
Branches
Unknown
Tags
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