https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111533
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Li Xu <x...@gcc.gnu.org>: https://gcc.gnu.org/g:110ffb2d8d3a64b32dd56ac995c2e30e8f64d4dc commit r14-4301-g110ffb2d8d3a64b32dd56ac995c2e30e8f64d4dc Author: xuli <xu...@eswincomputing.com> Date: Thu Sep 28 01:29:12 2023 +0000 RISC-V: Bugfix for RTL check[PR111533] Consider the flowing situation: BB5: local_dem(RVV Insn 1, AVL(reg zero)) RVV Insn 1: vmv.s.x, AVL (const_int 1) RVV Insn 2: vredsum.vs, AVL(reg zero) vmv.s.x has vl operand, the following code will get avl (cosnt_int) from RVV Insn 1. rtx avl = has_vl_op (insn->rtl ()) ? get_vl (insn->rtl ()) : dem.get_avl (); If use REGNO for const_int, the compiler will crash: during RTL pass: vsetvl res_debug.c: In function '__dn_count_labels': res_debug.c:1050:1: internal compiler error: RTL check: expected code 'reg', have 'const_int' in rhs_regno, at rtl.h:1934 1050 | } | ^ 0x8fb169 rtl_check_failed_code1(rtx_def const*, rtx_code, char const*, int, char const*) ../.././gcc/gcc/rtl.cc:770 0x1399818 rhs_regno(rtx_def const*) ../.././gcc/gcc/rtl.h:1934 0x1399818 anticipatable_occurrence_p ../.././gcc/gcc/config/riscv/riscv-vsetvl.cc:348 So in this case avl should be obtained from dem. Another issue is caused by the following code: HOST_WIDE_INT diff = INTVAL (builder.elt (i)) - i; during RTL pass: expand ../../.././gcc/libgfortran/generated/matmul_c4.c: In function 'matmul_c4': ../../.././gcc/libgfortran/generated/matmul_c4.c:2906:39: internal compiler error: RTL check: expected code 'const_int', have 'const_poly_int' in expand_const_vector, at config/riscv/riscv-v.cc:1149 The builder.elt (i) can be either const_int or const_poly_int. PR target/111533 gcc/ChangeLog: * config/riscv/riscv-v.cc (expand_const_vector): Fix bug. * config/riscv/riscv-vsetvl.cc (anticipatable_occurrence_p): Fix bug. gcc/testsuite/ChangeLog: * gcc.target/riscv/rvv/base/pr111533-1.c: New test. * gcc.target/riscv/rvv/base/pr111533-2.c: New test.
