[Bug target/93532] RISCV g++ hangs with optimization >= -O2

[giulio.benetti at benettiengineering dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93532

--- Comment #5 from Giulio Benetti <giulio.benetti at benettiengineering dot com> ---
Here is the specific command line which compiles .cpp file:
/home/giuliobenetti/br_reproduce/9a405ec6fabfa306c14a671a5e09359ac623c25b/output/host/bin/riscv32-linux-g++
--sysroot=/home/giuliobenetti/br_reproduce/9a405ec6fabfa306c14a671a5e09359ac623c25b/output/host/riscv32-buildroot-linux-gnu/sysroot
 -DBT_USE_EGL -DBulletCollision_EXPORTS -DNO_OPENGL3 -DUSE_GRAPHICAL_BENCHMARK
-I/home/giuliobenetti/br_reproduce/9a405ec6fabfa306c14a671a5e09359ac623c25b/output/build/bullet-2.89/src
 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -O2  
-save-temps  -DNDEBUG -fPIC   -o
CMakeFiles/BulletCollision.dir/NarrowPhaseCollision/btPolyhedralContactClipping.o
-c
/home/giuliobenetti/br_reproduce/9a405ec6fabfa306c14a671a5e09359ac623c25b/output/build/bullet-2.89/src/BulletCollision/NarrowPhaseCollision/btPolyhedralContactClipping.cpp

then it sits there forever.