https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89316
Bug ID: 89316 Summary: ICE in gen_reg_rtx, at emit-rtl.c:1155 Product: gcc Version: 9.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: gs...@t-online.de Target Milestone: --- Starting with gcc-8 and options -fsplit-stack -mforce-indirect-call; affects several test cases, e.g. : $ cat first-global.C struct foo { foo (); }; foo foobar; $ g++-9-20190210 -c first-global.C $ g++-9-20190210 -c first-global.C -fsplit-stack $ $ g++-9-20190210 -c first-global.C -fsplit-stack -mforce-indirect-call during RTL pass: pro_and_epilogue first-global.C: In function 'void __static_initialization_and_destruction_0(int, int)': first-global.C:2:11: internal compiler error: in gen_reg_rtx, at emit-rtl.c:1155 2 | foo foobar; | ^ 0x8bdda5 gen_reg_rtx(machine_mode) ../../gcc/emit-rtl.c:1155 0x8d1ffe copy_to_mode_reg(machine_mode, rtx_def*) ../../gcc/explow.c:622 0xe825b4 ix86_expand_call(rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*, bool) ../../gcc/config/i386/i386.c:28304 0xe831ba ix86_expand_split_stack_prologue() ../../gcc/config/i386/i386.c:14763 0x10bfa9a gen_split_stack_prologue() ../../gcc/config/i386/i386.md:13199 0xe4e548 target_gen_split_stack_prologue ../../gcc/config/i386/i386.md:12962 0x93a0c1 make_split_prologue_seq ../../gcc/function.c:5714 0x93a35a thread_prologue_and_epilogue_insns() ../../gcc/function.c:5850 0x93a952 rest_of_handle_thread_prologue_and_epilogue ../../gcc/function.c:6342 0x93a952 execute ../../gcc/function.c:6384