https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112445
--- Comment #2 from Zdenek Sojka <zsojka at seznam dot cz> --- Created attachment 56545 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56545&action=edit testcase failing just at -O1 $ x86_64-pc-linux-gnu-gcc -O testcase2.c testcase2.c: In function 'foo': testcase2.c:19:1: error: unable to find a register to spill 19 | } | ^ testcase2.c:19:1: error: this is the insn: (insn 36 155 216 2 (parallel [ (set (reg:TI 280 [orig:142 _66 ] [142]) (mult:TI (zero_extend:TI (reg:DI 171 [ cu8_0 ])) (zero_extend:TI (subreg:DI (reg:TI 104 [ _10 ]) 0)))) (clobber (reg:CC 17 flags)) ]) "testcase2.c":12:9 513 {*umulditi3_1} (expr_list:REG_DEAD (reg:DI 171 [ cu8_0 ]) (expr_list:REG_UNUSED (reg:CC 17 flags) (nil)))) during RTL pass: reload testcase2.c:19:1: internal compiler error: in lra_split_hard_reg_for, at lra-assigns.cc:1861 0x7f4bef _fatal_insn(char const*, rtx_def const*, char const*, int, char const*) /repo/gcc-trunk/gcc/rtl-error.cc:108 0x12bd93d lra_split_hard_reg_for() /repo/gcc-trunk/gcc/lra-assigns.cc:1861 0x12b6e38 lra(_IO_FILE*) /repo/gcc-trunk/gcc/lra.cc:2495 0x1265569 do_reload /repo/gcc-trunk/gcc/ira.cc:5973 0x1265569 execute /repo/gcc-trunk/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.
