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device: 0.900
instruction: 0.809
graphic: 0.768
vnc: 0.574
semantic: 0.519
socket: 0.490
network: 0.356
boot: 0.300
other: 0.222
assembly: 0.217
mistranslation: 0.187
KVM: 0.021
qos-test fails when built with LTO and gcc-12
Description of problem:
The issue is already discussed here [1]. I'm simply building latest QEMU release and running the test suite. I thought the issue was fixed in 7.0 but it has resurfaced. Do QEMU dev's not build with LTO? I'm not able to debug this but I can test any proposed fixes etc. Thanks.
[1] https://lore.kernel.org/all/1d3bbff9e92e7c8a24db9e140dcf3f428c2df103.camel@suse.com/
Steps to reproduce:
1. Build QEMU with gcc-12 and LTO enabled
2. Run make check
3. Observe test suite failures in qos-test
Additional information:
```
Summary of Failures:
2/265 qemu:qtest+qtest-aarch64 / qtest-aarch64/qos-test ERROR 0.59s killed by signal 6 SIGABRT
3/265 qemu:qtest+qtest-i386 / qtest-i386/qos-test ERROR 0.22s killed by signal 6 SIGABRT
7/265 qemu:qtest+qtest-x86_64 / qtest-x86_64/qos-test ERROR 0.40s killed by signal 6 SIGABRT
```
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