https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111486
--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The trunk branch has been updated by Lehua Ding <lh...@gcc.gnu.org>: https://gcc.gnu.org/g:38048fc501b3d53fc38c701ae4625024cd93bd1d commit r14-4193-g38048fc501b3d53fc38c701ae4625024cd93bd1d Author: Juzhe-Zhong <juzhe.zh...@rivai.ai> Date: Thu Sep 21 14:54:33 2023 +0800 RISC-V: Fix SUBREG move of VLS mode[PR111486] This patch fixes this bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111486 Before this patch, we can only handle (subreg:DI (reg:V8QI)) The PR ICE: during RTL pass: reload testcase.c: In function 'foo': testcase.c:8:1: internal compiler error: in require, at machmode.h:313 8 | } | ^ 0xa40cd2 opt_mode<machine_mode>::require() const /repo/gcc-trunk/gcc/machmode.h:313 0xa47091 opt_mode<machine_mode>::require() const /repo/gcc-trunk/gcc/config/riscv/riscv.cc:2546 0xa47091 riscv_legitimize_move(machine_mode, rtx_def*, rtx_def*) /repo/gcc-trunk/gcc/config/riscv/riscv.cc:2543 0x1f1df10 gen_movdi(rtx_def*, rtx_def*) /repo/gcc-trunk/gcc/config/riscv/riscv.md:2024 0x10f1423 rtx_insn* insn_gen_fn::operator()<rtx_def*, rtx_def*>(rtx_def*, rtx_def*) const /repo/gcc-trunk/gcc/recog.h:411 0x10f1423 emit_move_insn_1(rtx_def*, rtx_def*) /repo/gcc-trunk/gcc/expr.cc:4164 0x10f183d emit_move_insn(rtx_def*, rtx_def*) /repo/gcc-trunk/gcc/expr.cc:4334 0x13070ec lra_emit_move(rtx_def*, rtx_def*) /repo/gcc-trunk/gcc/lra.cc:509 0x132295b curr_insn_transform /repo/gcc-trunk/gcc/lra-constraints.cc:4748 0x1324335 lra_constraints(bool) /repo/gcc-trunk/gcc/lra-constraints.cc:5488 0x130a3d4 lra(_IO_FILE*) /repo/gcc-trunk/gcc/lra.cc:2419 0x12bb629 do_reload /repo/gcc-trunk/gcc/ira.cc:5970 0x12bb629 execute /repo/gcc-trunk/gcc/ira.cc:6156 Because of (subreg:DI (reg:V2QI)) PR target/111486 gcc/ChangeLog: * config/riscv/riscv.cc (riscv_legitimize_move): Fix bug. gcc/testsuite/ChangeLog: * gcc.target/riscv/rvv/autovec/pr111486.c: New test.
