https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113637
Bug ID: 113637 Summary: ICE: in as_a, at machmode.h:381 with extern function declaration and _BitInt() used as VLA size Product: gcc Version: 14.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: debug Assignee: unassigned at gcc dot gnu.org Reporter: zsojka at seznam dot cz CC: jakub at gcc dot gnu.org Target Milestone: --- Host: x86_64-pc-linux-gnu Target: x86_64-pc-linux-gnu Created attachment 57244 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57244&action=edit reduced testcase (from gcc.dg/Wvla-parameter-4.c) Compiler output: $ x86_64-pc-linux-gnu-gcc testcase.c -g testcase.c: In function 'foo': testcase.c:5:1: internal compiler error: in as_a, at machmode.h:381 5 | } | ^ 0x7418a8 scalar_int_mode as_a<scalar_int_mode>(machine_mode) /repo/gcc-trunk/gcc/machmode.h:381 0x748787 scalar_int_mode as_a<scalar_int_mode>(machine_mode) /repo/gcc-trunk/gcc/tree.h:3813 0x748787 loc_list_from_tree_1 /repo/gcc-trunk/gcc/dwarf2out.cc:19030 0x1058d7b loc_list_from_tree_1 /repo/gcc-trunk/gcc/dwarf2out.cc:19443 0x1066138 loc_list_from_tree /repo/gcc-trunk/gcc/dwarf2out.cc:19737 0x1066138 add_scalar_info /repo/gcc-trunk/gcc/dwarf2out.cc:21528 0x10671e1 add_subscript_info /repo/gcc-trunk/gcc/dwarf2out.cc:21767 0x1053f12 gen_array_type_die /repo/gcc-trunk/gcc/dwarf2out.cc:22641 0x1053f12 gen_type_die_with_usage /repo/gcc-trunk/gcc/dwarf2out.cc:26433 0x10557fd gen_type_die /repo/gcc-trunk/gcc/dwarf2out.cc:26496 0x10557fd modified_type_die /repo/gcc-trunk/gcc/dwarf2out.cc:13924 0x1055dc5 modified_type_die /repo/gcc-trunk/gcc/dwarf2out.cc:14068 0x10577a6 add_type_attribute /repo/gcc-trunk/gcc/dwarf2out.cc:22387 0x1068fc1 gen_formal_parameter_die /repo/gcc-trunk/gcc/dwarf2out.cc:23096 0x10693ce gen_formal_types_die /repo/gcc-trunk/gcc/dwarf2out.cc:23191 0x104ce8b gen_subprogram_die /repo/gcc-trunk/gcc/dwarf2out.cc:24063 0x10508ca gen_decl_die /repo/gcc-trunk/gcc/dwarf2out.cc:27113 0x106e6cf decls_for_scope /repo/gcc-trunk/gcc/dwarf2out.cc:26676 0x104beee gen_subprogram_die /repo/gcc-trunk/gcc/dwarf2out.cc:24174 0x10508ca gen_decl_die /repo/gcc-trunk/gcc/dwarf2out.cc:27113 Please submit a full bug report, with preprocessed source (by using -freport-bug). Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions. $ x86_64-pc-linux-gnu-gcc -v Using built-in specs. COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r14-8474-20240128132141-g46df13697a4-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/14.0.1/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++ --enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra --with-cloog --with-ppl --with-isl --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld --with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch --prefix=/repo/gcc-trunk//binary-trunk-r14-8474-20240128132141-g46df13697a4-checking-yes-rtl-df-extra-amd64 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 14.0.1 20240128 (experimental) (GCC)