https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113491
Bug ID: 113491 Summary: ICE: SIGSEGV in make_ssa_name_fn (tree-ssanames.cc:354) at -Os with _BitInt() used as switch control expression Product: gcc Version: 14.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: tree-optimization 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 57146 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57146&action=edit reduced testcase (from gcc.c-torture/compile/pr34093.c -Dint=_BitInt(617) ) Compiler output: $ x86_64-pc-linux-gnu-gcc -Os testcase.c -wrapper valgrind,-q ==8560== Invalid read of size 2 ==8560== at 0x177D8AA: make_ssa_name_fn(function*, tree_node*, gimple*, unsigned int) (tree-ssanames.cc:354) ==8560== by 0x1610EB2: make_ssa_name (tree-ssanames.h:98) ==8560== by 0x1610EB2: tree_switch_conversion::switch_conversion::build_arrays() (tree-switch-conversion.cc:727) ==8560== by 0x1611296: tree_switch_conversion::switch_conversion::expand(gswitch*) [clone .part.0] (tree-switch-conversion.cc:1067) ==8560== by 0x161135A: expand (tree-switch-conversion.cc:2546) ==8560== by 0x161135A: (anonymous namespace)::pass_convert_switch::execute(function*) (tree-switch-conversion.cc:2564) ==8560== by 0x13CC03A: execute_one_pass(opt_pass*) (passes.cc:2646) ==8560== by 0x13CC92F: execute_pass_list_1(opt_pass*) (passes.cc:2755) ==8560== by 0x13CC941: execute_pass_list_1(opt_pass*) (passes.cc:2756) ==8560== by 0x13CC968: execute_pass_list(function*, opt_pass*) (passes.cc:2766) ==8560== by 0x13CD28C: do_per_function_toporder(void (*)(function*, void*), void*) [clone .part.0] (passes.cc:1773) ==8560== by 0x13CD4BE: do_per_function_toporder (passes.cc:1740) ==8560== by 0x13CD4BE: execute_ipa_pass_list(opt_pass*) (passes.cc:3100) ==8560== by 0xFCDD37: ipa_passes (cgraphunit.cc:2211) ==8560== by 0xFCDD37: symbol_table::compile() [clone .part.0] (cgraphunit.cc:2332) ==8560== by 0xFD05B7: compile (cgraphunit.cc:2312) ==8560== by 0xFD05B7: symbol_table::finalize_compilation_unit() (cgraphunit.cc:2584) ==8560== Address 0x0 is not stack'd, malloc'd or (recently) free'd ==8560== during GIMPLE pass: switchconv testcase.c: In function 'foo': testcase.c:263:1: internal compiler error: Segmentation fault 263 | } | ^ 0x150ddef crash_signal /repo/gcc-trunk/gcc/toplev.cc:317 0x177d8aa make_ssa_name_fn(function*, tree_node*, gimple*, unsigned int) /repo/gcc-trunk/gcc/tree-ssanames.cc:354 0x1610eb2 make_ssa_name(tree_node*, gimple*) /repo/gcc-trunk/gcc/tree-ssanames.h:98 0x1610eb2 tree_switch_conversion::switch_conversion::build_arrays() /repo/gcc-trunk/gcc/tree-switch-conversion.cc:727 0x1611296 tree_switch_conversion::switch_conversion::expand(gswitch*) /repo/gcc-trunk/gcc/tree-switch-conversion.cc:1067 0x161135a tree_switch_conversion::switch_conversion::expand(gswitch*) /repo/gcc-trunk/gcc/tree-switch-conversion.cc:2546 0x161135a execute /repo/gcc-trunk/gcc/tree-switch-conversion.cc:2564 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.