https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109477
Bug ID: 109477 Summary: [13 regression] ICE: internal compiler error: verify_flow_info failed (error: returns_twice call is not first in basic block 8) when building busybox Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: sjames at gcc dot gnu.org Target Milestone: --- Host: x86_64-pc-linux-gnu Target: x86_64-pc-linux-gnu Build: x86_64-pc-linux-gnu Created attachment 54832 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54832&action=edit wget.i.orig Hit this when building busybox-1.34.1 w/ 13.0.1 20230409 with checking. ``` x86_64-pc-linux-gnu-gcc -Wp,-MD,networking/.wget.o.d -std=gnu99 -Iinclude -Ilibbb -include include/autoconf.h -D_GNU_SOURCE -DNDEBUG -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -DBB_VER='"1.34.1"' -O2 -pipe -march=native -fdiagnostics-color=always -frecord-gcc-switches -Wreturn-type -fno-strict-aliasing -Wall -Wshadow -Wwrite-strings -Wundef -Wstrict-prototypes -Wunused -Wunused-parameter -Wunused-function -Wunused-value -Wmissing-prototypes -Wmissing-declarations -Wno-format-security -Wdeclaration-after-statement -Wold-style-definition -finline-limit=0 -fno-builtin-strlen -ffunction-sections -fdata-sections -fno-guess-branch-probability -funsigned-char -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-builtin-printf -DKBUILD_BASENAME='"wget"' -DKBUILD_MODNAME='"wget"' -c -o networking/wget.o networking/wget.c networking/wget.c: In function ‘spawn_https_helper_openssl’: networking/wget.c:666:12: error: returns_twice call is not first in basic block 8 666 | static int spawn_https_helper_openssl(const char *host, unsigned port) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ bb__xvfork_pid_45 = vfork (); during GIMPLE pass: slp networking/wget.c:666:12: internal compiler error: verify_flow_info failed 0x7acafb verify_flow_info() /usr/src/debug/sys-devel/gcc-13.0.1_pre20230409-r1/gcc-13-20230409/gcc/cfghooks.cc:285 0x1523abd execute_function_todo /usr/src/debug/sys-devel/gcc-13.0.1_pre20230409-r1/gcc-13-20230409/gcc/passes.cc:2110 0x1489c51 do_per_function /usr/src/debug/sys-devel/gcc-13.0.1_pre20230409-r1/gcc-13-20230409/gcc/passes.cc:1694 0x1489c51 execute_todo /usr/src/debug/sys-devel/gcc-13.0.1_pre20230409-r1/gcc-13-20230409/gcc/passes.cc:2152 Please submit a full bug report, with preprocessed source (by using -freport-bug). Please include the complete backtrace with any bug report. See <https://bugs.gentoo.org/> for instructions. ```