https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110989
--- 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:0618adfa80fcd2fd7ae03b30553c60a6b1abf573 commit r14-3222-g0618adfa80fcd2fd7ae03b30553c60a6b1abf573 Author: Juzhe-Zhong <juzhe.zh...@rivai.ai> Date: Sat Aug 12 22:15:15 2023 +0800 RISC-V: Fix autovec_length_operand predicate[PR110989] Currently, autovec_length_operand predicate incorrect configuration is discovered in PR110989 since this following situation: vect__6.24_107 = .MASK_LEN_LOAD (vectp.22_105, 32B, mask__49.21_99, POLY_INT_CST [2, 2], 0); ---> dummy length = VF. The current autovec length operand failed to recognize the VF dummy length. -march=rv64gcv -mabi=lp64d --param=riscv-autovec-preference=scalable -Ofast -fno-schedule-insns -fno-schedule-insns2: Before this patch: srli a4,s0,2 addi a4,a4,-3 srli s0,s0,3 vsetvli a5,zero,e64,m1,ta,ma vid.v v1 vmul.vx v1,v1,a4 addi a4,s0,-2 vadd.vx v1,v1,a4 addi a4,s0,-1 vslide1up.vx v2,v1,a4 vmv.v.x v1,a4 vand.vv v1,v2,v1 vl1re64.v v3,0(t2) vrgather.vv v2,v3,v1 vmv.v.i v1,0 vmfeq.vv v0,v2,v1 vsetvli zero,s0,e32,mf2,ta,ma ---> s0 = POLY (2,2) vle32.v v3,0(t3),v0.t vsetvli a5,zero,e64,m1,ta,ma vmfne.vv v0,v2,v1 vsetvli zero,zero,e32,mf2,ta,ma vfwcvt.f.x.v v1,v3 vsetvli zero,zero,e64,m1,ta,ma vmerge.vvm v1,v1,v2,v0 vslidedown.vx v1,v1,a4 vfmv.f.s fa5,v1 j .L6 After this patch: srli a4,s0,2 addi a4,a4,-3 srli s0,s0,3 vsetvli a5,zero,e64,m1,ta,ma vid.v v1 vmul.vx v1,v1,a4 addi a4,s0,-2 vadd.vx v1,v1,a4 addi s0,s0,-1 vslide1up.vx v2,v1,s0 vmv.v.x v1,s0 vand.vv v1,v2,v1 vl1re64.v v3,0(t2) vrgather.vv v2,v3,v1 vmv.v.i v1,0 vmfeq.vv v0,v2,v1 vle32.v v3,0(t3),v0.t vmfne.vv v0,v2,v1 vsetvli zero,zero,e32,mf2,ta,ma vfwcvt.f.x.v v1,v3 vsetvli zero,zero,e64,m1,ta,ma vmerge.vvm v1,v1,v2,v0 vslidedown.vx v1,v1,s0 vfmv.f.s fa5,v1 j .L6 2 vsetvli insns are reduced. gcc/ChangeLog: PR target/110989 * config/riscv/predicates.md: Fix predicate. gcc/testsuite/ChangeLog: PR target/110989 * gcc.target/riscv/rvv/autovec/pr110989.c: Add vsetvli assembly check.
