https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82084
Bug ID: 82084 Summary: internal compiler error: constructing wstring with -O3 Product: gcc Version: 7.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: no_s...@loehndorf-flintbek.de Target Milestone: --- Created attachment 42107 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42107&action=edit preprocessed file for gcc 7 #include <string> int main() { wchar_t strs[4][2]= { L"A", L"B", L"C" , L"D"}; std::wstring ss(strs[0]); return 0; } Commandline: gcc -O3 -c test.cpp -o test.o Error message: test.cpp: In function ‘int main()’: test.cpp:2:5: internal compiler error: in vect_get_constant_vectors, at tree-vect-slp.c:3221 int main() ^~~~ 0xcc009a vect_get_constant_vectors ../../src/gcc/tree-vect-slp.c:3221 0xcc084a vect_get_slp_defs(vec<tree_node*, va_heap, vl_ptr>, _slp_tree*, vec<vec<tree_node*, va_heap, vl_ptr>, va_heap, vl_ptr>*, int) ../../src/gcc/tree-vect-slp.c:3453 0xc93060 vect_get_vec_defs(tree_node*, tree_node*, gimple*, vec<tree_node*, va_heap, vl_ptr>*, vec<tree_node*, va_heap, vl_ptr>*, _slp_tree*, int) ../../src/gcc/tree-vect-stmts.c:1558 0xc9bc16 vectorizable_store ../../src/gcc/tree-vect-stmts.c:6201 0xca68d6 vect_transform_stmt(gimple*, gimple_stmt_iterator*, bool*, _slp_tree*, _slp_instance*) ../../src/gcc/tree-vect-stmts.c:8696 0xcbdeca vect_schedule_slp_instance ../../src/gcc/tree-vect-slp.c:3787 0xcbf715 vect_schedule_slp(vec_info*) ../../src/gcc/tree-vect-slp.c:3858 0xcc4d47 vect_slp_bb(basic_block_def*) ../../src/gcc/tree-vect-slp.c:2891 0xcc5fb5 execute ../../src/gcc/tree-vectorizer.c:908 gcc version: gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper OFFLOAD_TARGET_NAMES=nvptx-none OFFLOAD_TARGET_DEFAULT=1 Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 7.2.0-1' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr --with-gcc-major-version-only --program-suffix=-7 --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 --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib --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 --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 7.2.0 (Debian 7.2.0-1) Compiles fine without optimization or -O2, also fails in with gcc-6 Using built-in specs. COLLECT_GCC=gcc-6 COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/6/lto-wrapper Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 6.4.0-3' --with-bugurl=file:///usr/share/doc/gcc-6/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-6 --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 --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-6-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-6-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-6-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --with-target-system-zlib --enable-objc-gc=auto --enable-multiarch --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 6.4.0 20170805 (Debian 6.4.0-3)