https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109004
Bug ID: 109004
Summary: wrong code for -O2 (any above -O0) with g++ 11.3 for
POWER9 (cross-compiler on x86_64 host)
Product: gcc
Version: 11.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: bugreporter66 at gmail dot com
Target Milestone: ---
Created attachment 54574
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54574&action=edit
archive with all the necessary source and output files
The code sample is attached with all the necessary output files. It's a
regression from g++ 9.x series, where it worked properly.
The line that fails the test is a ternary operator working on two memory
floating point operands: farr[n] < farr[m] ? farr[n] : farr[m];
Two potential workarounds for this are turning optimizations off (-O0) or
re-targeting to POWER8 instead (-O2 -mcpu=power8).
The test case is taken from https://github.com/VectorChief/UniSIMD-assembler,
where that test fails (v1.1.0c) for POWER9 target on Ubuntu MATE 22.04.2
