https://gcc.gnu.org/g:be69c3922f6b95d2b263469d62b3135f2f090d8b
commit be69c3922f6b95d2b263469d62b3135f2f090d8b
Author: Pan Li <pan2...@intel.com>
Date: Fri May 23 13:22:35 2025 +0800
RISC-V: Combine vec_duplicate + vor.vv to vor.vx on GR2VR cost
This patch would like to combine the vec_duplicate + vor.vv to the
vor.vx. From example as below code. The related pattern will depend
on the cost of vec_duplicate from GR2VR. Then the late-combine will
take action if the cost of GR2VR is zero, and reject the combination
if the GR2VR cost is greater than zero.
Assume we have example code like below, GR2VR cost is 0.
#define DEF_VX_BINARY(T, OP) \
void \
test_vx_binary (T * restrict out, T * restrict in, T x, unsigned n) \
{ \
for (unsigned i = 0; i < n; i++) \
out[i] = in[i] OP x; \
}
DEF_VX_BINARY(int32_t, |)
Before this patch:
10 │ test_vx_binary_or_int32_t_case_0:
11 │ beq a3,zero,.L8
12 │ vsetvli a5,zero,e32,m1,ta,ma
13 │ vmv.v.x v2,a2
14 │ slli a3,a3,32
15 │ srli a3,a3,32
16 │ .L3:
17 │ vsetvli a5,a3,e32,m1,ta,ma
18 │ vle32.v v1,0(a1)
19 │ slli a4,a5,2
20 │ sub a3,a3,a5
21 │ add a1,a1,a4
22 │ vor.vv v1,v1,v2
23 │ vse32.v v1,0(a0)
24 │ add a0,a0,a4
25 │ bne a3,zero,.L3
After this patch:
10 │ test_vx_binary_or_int32_t_case_0:
11 │ beq a3,zero,.L8
12 │ slli a3,a3,32
13 │ srli a3,a3,32
14 │ .L3:
15 │ vsetvli a5,a3,e32,m1,ta,ma
16 │ vle32.v v1,0(a1)
17 │ slli a4,a5,2
18 │ sub a3,a3,a5
19 │ add a1,a1,a4
20 │ vor.vx v1,v1,a2
21 │ vse32.v v1,0(a0)
22 │ add a0,a0,a4
23 │ bne a3,zero,.L3
The below test suites are passed for this patch.
* The rv64gcv fully regression test.
gcc/ChangeLog:
* config/riscv/riscv-v.cc (expand_vx_binary_vec_dup_vec): Add new
case for IOR op.
(expand_vx_binary_vec_vec_dup): Ditto.
* config/riscv/riscv.cc (riscv_rtx_costs): Ditto.
* config/riscv/vector-iterators.md: Add new op or to
no_shift_vx_ops.
Signed-off-by: Pan Li <pan2...@intel.com>
(cherry picked from commit 2fab99bb95db4dd47dbd07137a4c03776f476c55)
Diff:
---
gcc/config/riscv/riscv-v.cc | 2 ++
gcc/config/riscv/riscv.cc | 1 +
gcc/config/riscv/vector-iterators.md | 2 +-
3 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/gcc/config/riscv/riscv-v.cc b/gcc/config/riscv/riscv-v.cc
index be6147b80a2c..a6ee582f87e6 100644
--- a/gcc/config/riscv/riscv-v.cc
+++ b/gcc/config/riscv/riscv-v.cc
@@ -5534,6 +5534,7 @@ expand_vx_binary_vec_dup_vec (rtx op_0, rtx op_1, rtx
op_2,
{
case PLUS:
case AND:
+ case IOR:
icode = code_for_pred_scalar (code, mode);
break;
case MINUS:
@@ -5561,6 +5562,7 @@ expand_vx_binary_vec_vec_dup (rtx op_0, rtx op_1, rtx
op_2,
{
case MINUS:
case AND:
+ case IOR:
icode = code_for_pred_scalar (code, mode);
break;
default:
diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index 5c0c8beec3bd..18c8e188f23b 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -3917,6 +3917,7 @@ riscv_rtx_costs (rtx x, machine_mode mode, int
outer_code, int opno ATTRIBUTE_UN
case PLUS:
case MINUS:
case AND:
+ case IOR:
{
rtx op_0 = XEXP (x, 0);
rtx op_1 = XEXP (x, 1);
diff --git a/gcc/config/riscv/vector-iterators.md
b/gcc/config/riscv/vector-iterators.md
index 026be6f65d39..a50b7fde9c6d 100644
--- a/gcc/config/riscv/vector-iterators.md
+++ b/gcc/config/riscv/vector-iterators.md
@@ -4042,7 +4042,7 @@
])
(define_code_iterator any_int_binop_no_shift_vx [
- plus minus and
+ plus minus and ior
])
(define_code_iterator any_int_unop [neg not])
