[Bug target/109004] [10/11/12/13 Regression] wrong code for -O2 (any above -O0) with g++ 11.3 for POWER9 (cross-compiler on x86_64 host)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109004 --- Comment #11 from bugreporter66 at gmail dot com --- Created a QEMU bug here: https://gitlab.com/qemu-project/qemu/-/issues/1547

[Bug target/109004] [10/11/12/13 Regression] wrong code for -O2 (any above -O0) with g++ 11.3 for POWER9 (cross-compiler on x86_64 host)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109004 --- Comment #10 from bugreporter66 at gmail dot com --- I checked the simple version of the test with QEMU 6.2.0 and 7.0.0: ubuntu-mate@ubuntu-mate:~/Downloads/test_p64$ ubuntu-mate@ubuntu-mate:~/Downloads/test_p64$ powerpc64le-linux-gnu-g++ -O

[Bug target/109004] [10/11/12/13 Regression] wrong code for -O2 (any above -O0) with g++ 11.3 for POWER9 (cross-compiler on x86_64 host)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109004 --- Comment #9 from bugreporter66 at gmail dot com --- Created attachment 54683 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54683&action=edit sample_p64

[Bug target/109004] [10/11/12/13 Regression] wrong code for -O2 (any above -O0) with g++ 11.3 for POWER9 (cross-compiler on x86_64 host)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109004 --- Comment #7 from bugreporter66 at gmail dot com --- Good to know. I will file a QEMU bug then. Thank you for your efforts.

[Bug target/109004] [10/11/12/13 Regression] wrong code for -O2 (any above -O0) with g++ 11.3 for POWER9 (cross-compiler on x86_64 host)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109004 --- Comment #5 from bugreporter66 at gmail dot com --- The exact command line used to produce the new binaries (added -static): ubuntu-mate@ubuntu-mate:~/Downloads/bug$ powerpc64le-linux-gnu-g++ -o test_p64-test{0,.ii} -mcpu=power9 -O0 -fpie -p

[Bug target/109004] [10/11/12/13 Regression] wrong code for -O2 (any above -O0) with g++ 11.3 for POWER9 (cross-compiler on x86_64 host)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109004 --- Comment #4 from bugreporter66 at gmail dot com --- The test prints two array values (farr[11], farr[3]) and then calculates and prints their respective minimum and maximum values. The first line (unoptimized) is a correct behavior (only showi

[Bug target/109004] [10/11/12/13 Regression] wrong code for -O2 (any above -O0) with g++ 11.3 for POWER9 (cross-compiler on x86_64 host)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109004 --- Comment #3 from bugreporter66 at gmail dot com --- Created attachment 54680 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54680&action=edit binaries and output files as text

[Bug target/109007] building for POWER8 leaks into POWER9 ISA with g++ 11.3 (cross-compiler on x86_64 host)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109007 --- Comment #19 from bugreporter66 at gmail dot com --- On the side note, my POWER8 machine can only run Ubuntu 16.04 LTS and Ubuntu 18.04 LTS, later releases simply won't boot. So it's getting outdated anyway.

[Bug target/109007] building for POWER8 leaks into POWER9 ISA with g++ 11.3 (cross-compiler on x86_64 host)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109007 --- Comment #18 from bugreporter66 at gmail dot com --- I noticed that building on newer Linux distros often produces a binary that then cannot run on older ones even with the same CPU, it requires newer libraries at runtime (tried that with x86_

[Bug target/109007] building for POWER8 leaks into POWER9 ISA with g++ 11.3 (cross-compiler on x86_64 host)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109007 --- Comment #14 from bugreporter66 at gmail dot com --- I should be able to workaround that by emulating all LE targets on POWER9, with a comment that building for POWER8 natively on target should work too.

[Bug target/109007] building for POWER8 leaks into POWER9 ISA with g++ 11.3 (cross-compiler on x86_64 host)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109007 --- Comment #12 from bugreporter66 at gmail dot com --- Yep, thanks. At least I've learned how to debug with QEMU and GDB and I think building without -static should still produce code compatible with POWER8 for the actual target, but not for QE

[Bug target/109007] building for POWER8 leaks into POWER9 ISA with g++ 11.3 (cross-compiler on x86_64 host)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109007 --- Comment #10 from bugreporter66 at gmail dot com --- Yes, it seems so. They've switched to POWER9 by default in Ubuntu 22.04, so it means that gcc itself (along with standard libraries) was compiled for POWER9 as well. It used to be POWER8 in

[Bug target/109007] building for POWER8 leaks into POWER9 ISA with g++ 11.3 (cross-compiler on x86_64 host)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109007 --- Comment #8 from bugreporter66 at gmail dot com --- Created attachment 54583 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54583&action=edit Screenshot with GDB+disassembly

[Bug target/109007] building for POWER8 leaks into POWER9 ISA with g++ 11.3 (cross-compiler on x86_64 host)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109007 --- Comment #7 from bugreporter66 at gmail dot com --- After disassembling the instruction in question is stxv at 100034b0: 10003470 <_GLOBAL__sub_I_eh_alloc.cc>: 10003470: 15 10 40 3c lis r2,4117 10003474: 00 7c 42 3

[Bug target/109007] building for POWER8 leaks into POWER9 ISA with g++ 11.3 (cross-compiler on x86_64 host)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109007 --- Comment #5 from bugreporter66 at gmail dot com --- Created attachment 54582 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54582&action=edit Screenshot with QEMU+GDB

[Bug target/109007] building for POWER8 leaks into POWER9 ISA with g++ 11.3 (cross-compiler on x86_64 host)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109007 --- Comment #4 from bugreporter66 at gmail dot com --- I did the remote debugging as suggested by Andrew Pinski and it seems to fail somewhere in _GLOBAL__sub_i_eh_alloc.cc After connecting to qemu from gdb I issued step command and the program

[Bug target/109007] building for POWER8 leaks into POWER9 ISA with g++ 11.3 (cross-compiler on x86_64 host)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109007 --- Comment #3 from bugreporter66 at gmail dot com --- Thanks, I will try to find out and be more specific where exactly it leaks. It was my first attempt at reducing the code that would fit into 1MB attachment. Checked g++ 10.4 today, it works

[Bug target/109004] [10/11/12/13 Regression] wrong code for -O2 (any above -O0) with g++ 11.3 for POWER9 (cross-compiler on x86_64 host)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109004 --- Comment #1 from bugreporter66 at gmail dot com --- Checked g++ 10.4 today, it works as it should. 11.3 and 12.1 were tested to show the issue so far. The command line for building: powerpc64le-linux-gnu-g++ -O2 -static test.cpp -o test_p64

[Bug target/109007] New: building for POWER8 leaks into POWER9 ISA with g++ 11.3 (cross-compiler on x86_64 host)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109007 Bug ID: 109007 Summary: building for POWER8 leaks into POWER9 ISA with g++ 11.3 (cross-compiler on x86_64 host) Product: gcc Version: 11.3.0 Status: UNCONFIRMED

[Bug target/109004] New: wrong code for -O2 (any above -O0) with g++ 11.3 for POWER9 (cross-compiler on x86_64 host)

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