https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92301
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> --- Created attachment 47145 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47145&action=edit Reproduce patch Ok, steps to reproduce that: 1) install latest GCC trunk and use it as compiler 2) apply the patch 3) build df-scan.o with -O3 -march=skylake 4) echo 'int foo() {}' | ./xgcc -B. -x c -g -O2 - during RTL pass: stv <stdin>: In function ‘foo’: <stdin>:1:1: internal compiler error: in df_reorganize_refs_by_reg_by_reg, at df-scan.c:1350 0x620205 df_reorganize_refs_by_reg_by_reg /home/marxin/Programming/gcc/gcc/df-scan.c:1350 0x9cbac4 df_reorganize_refs_by_reg /home/marxin/Programming/gcc/gcc/df-scan.c:1563 0x9cbac4 df_maybe_reorganize_def_refs(df_ref_order) /home/marxin/Programming/gcc/gcc/df-scan.c:1717 0x9c077f df_rd_local_compute /home/marxin/Programming/gcc/gcc/df-problems.c:401 0x9ba6a1 df_analyze_problem(dataflow*, bitmap_head*, int*, int) /home/marxin/Programming/gcc/gcc/df-core.c:1170 0x9ba799 df_analyze_1 /home/marxin/Programming/gcc/gcc/df-core.c:1227 0x1160cfa convert_scalars_to_vector /home/marxin/Programming/gcc/gcc/config/i386/i386-features.c:1621 0x1160cfa execute /home/marxin/Programming/gcc/gcc/config/i386/i386-features.c:1909 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions.
