https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116057
Bug ID: 116057
Summary: Miscompilation of nodejs with -ftree-slp-vectorize on
arm64 and probably others
Product: gcc
Version: 14.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: fnkl.kernel at gmail dot com
Target Milestone: ---
Created attachment 58741
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58741&action=edit
Reduced example.
Attempting to compile the attached file with "g++ -pthread -O1
-ftree-slp-vectorize -pipe -std=gnu++20 -fno-stack-protector" on arm64 results
in a miscompilation where ObjectWriteToReadOnlyProperty returns 1 in x0 on
Throw() path. Removing '-ftree-slp-vectorize' results in correct output.
This is a reduced example that was extraced from nodejs code.
On arm64 specifically, this is a regression caused by
33c2b70dbabc02788caabcbc66b7baeafeb95bcf, however as that commit only changes
costs, the bug is most likely somewhere else.
