https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113102
--- Comment #1 from Zdenek Sojka <zsojka at seznam dot cz> --- Created attachment 56914 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56914&action=edit testcase failing at -O2 $ x86_64-pc-linux-gnu-gcc -O2 testcase-O2.c -wrapper valgrind,-q ==16387== Invalid read of size 4 ==16387== at 0x114FEA7: phi_nodes_ptr (gimple.h:4700) ==16387== by 0x114FEA7: gsi_start_phis (gimple-iterator.cc:935) ==16387== by 0x114FEA7: gsi_for_stmt(gimple*) (gimple-iterator.cc:620) ==16387== by 0x263223A: gimple_lower_bitint() (gimple-lower-bitint.cc:6695) ==16387== by 0x13C4DCA: execute_one_pass(opt_pass*) (passes.cc:2646) ==16387== by 0x13C56BF: execute_pass_list_1(opt_pass*) (passes.cc:2755) ==16387== by 0x13C56D1: execute_pass_list_1(opt_pass*) (passes.cc:2756) ==16387== by 0x13C56F8: execute_pass_list(function*, opt_pass*) (passes.cc:2766) ==16387== by 0xFC60E5: expand (cgraphunit.cc:1842) ==16387== by 0xFC60E5: cgraph_node::expand() (cgraphunit.cc:1795) ==16387== by 0xFC742A: expand_all_functions (cgraphunit.cc:2025) ==16387== by 0xFC742A: symbol_table::compile() [clone .part.0] (cgraphunit.cc:2399) ==16387== by 0xFC9FA7: compile (cgraphunit.cc:2312) ==16387== by 0xFC9FA7: symbol_table::finalize_compilation_unit() (cgraphunit.cc:2584) ==16387== by 0x1506CF1: compile_file() (toplev.cc:473) ==16387== by 0xDE3BFB: do_compile (toplev.cc:2150) ==16387== by 0xDE3BFB: toplev::main(int, char**) (toplev.cc:2306) ==16387== by 0xDE53DA: main (main.cc:39) ==16387== Address 0x50 is not stack'd, malloc'd or (recently) free'd ==16387== during GIMPLE pass: bitintlower testcase-O2.c: In function 'foo': testcase-O2.c:4:1: internal compiler error: Segmentation fault 4 | foo(void) | ^~~ 0x150680f crash_signal /repo/gcc-trunk/gcc/toplev.cc:316 0x114fea7 phi_nodes_ptr(basic_block_def*) /repo/gcc-trunk/gcc/gimple.h:4700 0x114fea7 gsi_start_phis(basic_block_def*) /repo/gcc-trunk/gcc/gimple-iterator.cc:935 0x114fea7 gsi_for_stmt(gimple*) /repo/gcc-trunk/gcc/gimple-iterator.cc:620 0x263223a gimple_lower_bitint /repo/gcc-trunk/gcc/gimple-lower-bitint.cc:6695 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.
