https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96513
Bug ID: 96513 Summary: building terminated with -O3 Product: gcc Version: 9.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: zhenglin.huang at qdreamer dot com Target Milestone: --- gcc -o wtk/core/fft/wtk_fixfft.o -c -O3 -DHAVE_MATH_H -DDEBUG_VAD_DELAY -DUSE_LINUX -DUSE_STDLIB_MALLOC -DHAVE_STDIO_H -DVAD_MLF_DEBUG -I. -Ipublic/inc -Itest wtk/core/fft/wtk_fixfft.c when I compile use above command I got this during GIMPLE pass: vect wtk/core/fft/wtk_fixfft.c: In function ‘wtk_fixfft_work.isra.0.constprop’: wtk/core/fft/wtk_fixfft.c:672:13: internal compiler error: in vect_get_vec_def_for_operand_1, at tree-vect-stmts.c:1552 672 | static void wtk_fixfft_work(wtk_fixfft_substate_t *st, wtk_fixcpx_t *Fout, | ^~~~~~~~~~~~~~~ Please submit a full bug report, with preprocessed source if appropriate. See <file:///usr/share/doc/gcc-9/README.Bugs> for instructions. only -O3 got this error, -O2 is normal. Sorry, I can't submit source code as it is not my personal code. gcc -v output Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/9/lto-wrapper OFFLOAD_TARGET_NAMES=nvptx-none:hsa OFFLOAD_TARGET_DEFAULT=1 Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Ubuntu 9.3.0-10ubuntu2' --with-bugurl=file:///usr/share/doc/gcc-9/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,gm2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-9 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none,hsa --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 9.3.0 (Ubuntu 9.3.0-10ubuntu2)