https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113193
Oleg Endo <olegendo at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Known to fail| |13.2.1 Version|14.0 |13.0 Status|UNCONFIRMED |NEW Keywords| |ra Ever confirmed|0 |1 Last reconfirmed| |2024-01-05 --- Comment #1 from Oleg Endo <olegendo at gcc dot gnu.org> --- I was able to reproduce the bug with the following compiler options on 13 branch: -x c++ -std=c++17 -O3 -m4-single -ml -mfsca -mfsrra -funsafe-math-optimizations combined.cpp: In function 'void transform(const model_transform&, const vec3*, int, float*)': combined.cpp:574:1: internal compiler error: in gen_reg_rtx, at emit-rtl.cc:1171 0x61da53 gen_reg_rtx(machine_mode) ../../gcc/gcc/emit-rtl.cc:1171 0x9e8cc1 copy_to_reg(rtx_def*) ../../gcc/gcc/explow.cc:622 0x9d7727 operand_subword_force(rtx_def*, poly_int<1u, unsigned long>, machine_mode) ../../gcc/gcc/emit-rtl.cc:1812 0xa0eddc emit_move_multi_word ../../gcc/gcc/expr.cc:4129 0xa12bdb gen_move_insn(rtx_def*, rtx_def*) ../../gcc/gcc/expr.cc:4359 0xccfcda gen_reload ../../gcc/gcc/reload1.cc:8614 0xcd8956 emit_output_reload_insns ../../gcc/gcc/reload1.cc:7667 0xcd8956 do_output_reload ../../gcc/gcc/reload1.cc:7939 0xcd8956 emit_reload_insns ../../gcc/gcc/reload1.cc:8003 0xcd8956 reload_as_needed ../../gcc/gcc/reload1.cc:4543 0xcdc460 reload(rtx_insn*, int) ../../gcc/gcc/reload1.cc:1047 0xb78004 do_reload ../../gcc/gcc/ira.cc:5975 0xb78004 execute ../../gcc/gcc/ira.cc:6149 With added -mlra: ombined.cpp: In function 'void transform(const model_transform&, const vec3*, int, float*)': combined.cpp:574:1: internal compiler error: maximum number of generated reload insns per insn achieved (90) 0xbd0699 lra_constraints(bool) ../../gcc/gcc/lra-constraints.cc:5258 0xbbc182 lra(_IO_FILE*) ../../gcc/gcc/lra.cc:2375 0xb77999 do_reload ../../gcc/gcc/ira.cc:5963 0xb77999 execute ../../gcc/gcc/ira.cc:6149