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This patch support VLS modes auto-vectorization to enhance VLA auto-vectorization
when niters is known.
Consider this following case:
void __attribute__ ((noinline, noclone)) \
PREFIX##_##TYPE##NUM (TYPE *__restrict a, TYPE *__restrict b, TYPE *__restrict c) \
{ \
for (int i = 0; i < NUM; ++i) \
a[i] = b[i] OP c[i]; \
}
DEF_OP_VV (plus, 16, int8_t, +)
Before this patch:
plus_int8_t16(signed char*, signed char*, signed char*):
li a5,16
csrr a4,vlenb
bleu a5,a4,.L2
mv a5,a4
.L2:
vsetvli zero,a5,e8,m1,ta,ma
vle8.v v2,0(a1)
vle8.v v1,0(a2)
vsetvli a4,zero,e8,m1,ta,ma
vadd.vv v1,v1,v2
vsetvli zero,a5,e8,m1,ta,ma
vse8.v v1,0(a0)
ret
After this patch:
plus_int8_t16:
vsetivli zero,16,e8,m1,ta,ma
vle8.v v1,0(a2)
vle8.v v2,0(a1)
vadd.vv v1,v1,v2
vse8.v v1,0(a0)
ret
gcc/ChangeLog:
* config/riscv/autovec-vls.md (<optab><mode>3): Add VLS modes.
* config/riscv/vector-iterators.md: Ditto.
* config/riscv/vector.md: Ditto.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/rvv/autovec/vls/def.h: Add basic operations.
* gcc.target/riscv/rvv/autovec/vls/and-1.c: New test.
* gcc.target/riscv/rvv/autovec/vls/and-2.c: New test.
* gcc.target/riscv/rvv/autovec/vls/and-3.c: New test.
* gcc.target/riscv/rvv/autovec/vls/div-1.c: New test.
* gcc.target/riscv/rvv/autovec/vls/ior-1.c: New test.
* gcc.target/riscv/rvv/autovec/vls/ior-2.c: New test.
* gcc.target/riscv/rvv/autovec/vls/ior-3.c: New test.
* gcc.target/riscv/rvv/autovec/vls/max-1.c: New test.
* gcc.target/riscv/rvv/autovec/vls/min-1.c: New test.
* gcc.target/riscv/rvv/autovec/vls/minus-1.c: New test.
* gcc.target/riscv/rvv/autovec/vls/minus-2.c: New test.
* gcc.target/riscv/rvv/autovec/vls/minus-3.c: New test.
* gcc.target/riscv/rvv/autovec/vls/mod-1.c: New test.
* gcc.target/riscv/rvv/autovec/vls/mult-1.c: New test.
* gcc.target/riscv/rvv/autovec/vls/plus-1.c: New test.
* gcc.target/riscv/rvv/autovec/vls/plus-2.c: New test.
* gcc.target/riscv/rvv/autovec/vls/plus-3.c: New test.
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