https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97636
Bug ID: 97636 Summary: error: missing ‘PHI’ def Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: dcb314 at hotmail dot com Target Milestone: --- Created attachment 49469 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49469&action=edit C++ source code For the attached C++ code, with compiler flag -O3, does this: $ /home/dcb/gcc/results/bin/gcc -c -w -O3 bug664.cc bug664.cc: In function ‘int main()’: bug664.cc:77:1: error: missing ‘PHI’ def 77 | main() { | ^~~~ vect_b_b_6.26_26 = PHI <(8), vect_b_b_19.25_25(7)> during GIMPLE pass: slp bug664.cc:77:1: internal compiler error: verify_gimple failed 0xf6b14f verify_gimple_in_cfg(function*, bool) ../../trunk.git/gcc/tree-cfg.c:5461 0xe4e78c execute_function_todo(function*, void*) ../../trunk.git/gcc/passes.c:1992 The bug first seems to appear sometime between 20201027 and 20201028