https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115013
Jeffrey A. Law <law at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |law at gcc dot gnu.org Target|RISC-V |RISC-V, pru --- Comment #1 from Jeffrey A. Law <law at gcc dot gnu.org> --- The LRA patch has also been identified as the cause of similar failures in the PRU port (gcc.dg/pr71478.c): /cc1 -O2 pr71478.c -quiet pr71478.c: In function ‘foo’: pr71478.c:19:1: error: unable to find a register to spill 19 | } | ^ pr71478.c:19:1: error: this is the insn: (insn 15 33 30 2 (set (reg:SI 169 [orig:163 _11 ] [163]) (mult:SI (reg:SI 171) (reg:SI 172 [170]))) "pr71478.c":18:12 discrim 1 631 {mulsi3} (expr_list:REG_DEAD (reg:SI 172 [170]) (expr_list:REG_DEAD (reg:SI 171) (nil)))) during RTL pass: reload pr71478.c:19:1: internal compiler error: in lra_split_hard_reg_for, at lra-assigns.cc:1868 0x14fda20 _fatal_insn(char const*, rtx_def const*, char const*, int, char const*) /home/jlaw/test/gcc/gcc/rtl-error.cc:108 0x12eff3a lra_split_hard_reg_for() /home/jlaw/test/gcc/gcc/lra-assigns.cc:1868 0x12e91fe lra(_IO_FILE*, int) /home/jlaw/test/gcc/gcc/lra.cc:2518 0x1291c6b do_reload /home/jlaw/test/gcc/gcc/ira.cc:5973 0x12920fa execute /home/jlaw/test/gcc/gcc/ira.cc:6161 Please submit a full bug report, with preprocessed source (by using -freport-bug). Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions. jlaw@x11-dpi:~/test/obj/pru/gcc/gcc$