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* [gcc r14-3614] RISC-V: Enable VECT_COMPARE_COSTS by default
@ 2023-09-01 11:02 Pan Li
0 siblings, 0 replies; only message in thread
From: Pan Li @ 2023-09-01 11:02 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:5f2098cce6c75117927fef317c714dd2088b0189
commit r14-3614-g5f2098cce6c75117927fef317c714dd2088b0189
Author: Juzhe-Zhong <juzhe.zhong@rivai.ai>
Date: Fri Sep 1 07:10:00 2023 +0800
RISC-V: Enable VECT_COMPARE_COSTS by default
since we have added COST framework, we by default enable VECT_COMPARE_COSTS.
Also, add 16/32/64 to provide more choices for COST comparison.
This patch doesn't change any behavior from the current testsuite since we are using
default COST model.
gcc/ChangeLog:
* config/riscv/riscv-v.cc (autovectorize_vector_modes): Enable
VECT_COMPARE_COSTS by default.
Diff:
---
gcc/config/riscv/riscv-v.cc | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/gcc/config/riscv/riscv-v.cc b/gcc/config/riscv/riscv-v.cc
index 6228ff3d92e9..c8ad96f44d5e 100644
--- a/gcc/config/riscv/riscv-v.cc
+++ b/gcc/config/riscv/riscv-v.cc
@@ -2173,7 +2173,7 @@ autovectorize_vector_modes (vector_modes *modes, bool)
full vectors for wider elements.
- full_size / 8:
Try using 64-bit containers for all element types. */
- static const int rvv_factors[] = {1, 2, 4, 8};
+ static const int rvv_factors[] = {1, 2, 4, 8, 16, 32, 64};
for (unsigned int i = 0; i < sizeof (rvv_factors) / sizeof (int); i++)
{
poly_uint64 units;
@@ -2183,12 +2183,8 @@ autovectorize_vector_modes (vector_modes *modes, bool)
modes->safe_push (mode);
}
}
- unsigned int flag = 0;
if (TARGET_VECTOR_VLS)
{
- /* Enable VECT_COMPARE_COSTS between VLA modes VLS modes for scalable
- auto-vectorization. */
- flag |= VECT_COMPARE_COSTS;
/* Push all VLSmodes according to TARGET_MIN_VLEN. */
unsigned int i = 0;
unsigned int base_size = TARGET_MIN_VLEN * riscv_autovec_lmul / 8;
@@ -2201,7 +2197,8 @@ autovectorize_vector_modes (vector_modes *modes, bool)
size = base_size / (1U << i);
}
}
- return flag;
+ /* Enable LOOP_VINFO comparison in COST model. */
+ return VECT_COMPARE_COSTS;
}
/* If the given VECTOR_MODE is an RVV mode, first get the largest number
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