https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111153
--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Pan Li <pa...@gcc.gnu.org>: https://gcc.gnu.org/g:fafd2502c5416fe4f69daf13224ab1efbf256a1c commit r14-4086-gfafd2502c5416fe4f69daf13224ab1efbf256a1c Author: Juzhe-Zhong <juzhe.zh...@rivai.ai> Date: Sun Sep 17 10:05:49 2023 +0800 RISC-V: Support VLS modes reduction[PR111153] This patch supports VLS reduction vectorization. It can optimize the current reduction vectorization codegen with current COST model. TYPE __attribute__ ((noinline, noclone)) \ reduc_plus_##TYPE (TYPE * __restrict a, int n) \ { \ TYPE r = 0; \ for (int i = 0; i < n; ++i) \ r += a[i]; \ return r; \ } T (int32_t) \ TEST_PLUS (DEF_REDUC_PLUS) Before this patch: vle32.v v2,0(a5) addi a5,a5,16 vadd.vv v1,v1,v2 bne a5,a4,.L4 lui a4,%hi(.LC0) lui a5,%hi(.LC1) addi a4,a4,%lo(.LC0) vlm.v v0,0(a4) addi a5,a5,%lo(.LC1) andi a1,a1,-4 vmv1r.v v2,v3 vlm.v v4,0(a5) vcompress.vm v2,v1,v0 vmv1r.v v0,v4 vadd.vv v1,v2,v1 vcompress.vm v3,v1,v0 vadd.vv v3,v3,v1 vmv.x.s a0,v3 sext.w a0,a0 beq a3,a1,.L12 After this patch: vle32.v v2,0(a5) addi a5,a5,16 vadd.vv v1,v1,v2 bne a5,a4,.L4 li a5,0 andi a1,a1,-4 vmv.s.x v2,a5 vredsum.vs v1,v1,v2 vmv.x.s a0,v1 beq a3,a1,.L12 PR target/111153 gcc/ChangeLog: * config/riscv/autovec.md: Add VLS modes. gcc/testsuite/ChangeLog: * gcc.target/riscv/rvv/autovec/vls/def.h: Add VLS mode reduction case. * gcc.target/riscv/rvv/autovec/vls/reduc-1.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-10.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-11.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-12.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-13.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-14.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-15.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-16.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-17.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-18.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-19.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-2.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-20.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-21.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-3.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-4.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-5.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-6.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-7.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-8.c: New test. * gcc.target/riscv/rvv/autovec/vls/reduc-9.c: New test.