https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87686
Bug ID: 87686 Summary: [9 regression] internal error in expand, at tree-switch-conversion.c:916 Product: gcc Version: 9.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: ebotcazou at gcc dot gnu.org Target Milestone: --- Target: x86_64-linux Created attachment 44878 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44878&action=edit Testcase It's a doubly-reduced testcase (reduced for this PR after having being reduced for another issue) so it might be borderline, but it should not ICE anyway: t.cpp: In member function 'k k::l()': t.cpp:16:18: warning: no return statement in function returning non-void [-Wreturn-type] 16 | k l() { j.i(); } | ^ t.cpp: In member function 'a a::i()': t.cpp:12:3: warning: control reaches end of non-void function [-Wreturn-type] 12 | } | ^ during GIMPLE pass: switchconv t.cpp: In member function 'k k::l()': t.cpp:18:22: internal compiler error: in expand, at tree-switch-conversion.c:916 18 | void m(k h) { h.l(); } | ^ Please submit a full bug report, with preprocessed source if appropriate. See <https://gcc.gnu.org/bugs/> for instructions.