[Bug target/106187] armhf: Miscompilation at O2 level (O0 / O1 are working)

[jan.wassenberg at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106187

--- Comment #7 from Jan Wassenberg <jan.wassenberg at gmail dot com> ---
The easiest way to reduce the amount of code in the binary is to comment out
from mul_test.cc all the HWY_EXPORT_AND_TEST_P except the one with
TestAllMulEven.

The actual miscompilation is probably happening within ops/emu128-inl.h.

You can further reduce instantiations by replacing
ForFloatTypes(ForPartialVectors<TestMulAdd>());
with
TestMulAdd()(float(), FixedTag<float, 4>());

That gets us down to a fairly minimal single TU (mul_test.cc).