wangpc-pp wrote: The current result on llvm-testsuite of this approach(compiled with `-O3 -march=rva23u64 -mrvv-vector-bits=128`, `-mrvv-vector-bits` is specified to increase the opportunities of vectorization): ``` Metric: riscv-insert-vsetvli.NumInsertedVSETVL,riscv-instr-info.NumVRegSpilled,riscv-instr-info.NumVRegReloaded
Program
riscv-insert-vsetvli.NumInsertedVSETVL
riscv-instr-info.NumVRegSpilled
riscv-instr-info.NumVRegReloaded
baseline
vtype-sched diff baseline vtype-sched diff
baseline vtype-sched diff
SingleSource/Benchmarks/Stanford/Queens 26.00
17.00 -34.6% 12.00 12.00 0.0%
12.00 12.00 0.0%
SingleSource/Benchmarks/Stanford/Oscar 12.00
10.00 -16.7%
MultiSourc...arks/Rodinia/backprop/backprop 14.00
12.00 -14.3%
SingleSource/Benchmarks/Misc/flops-8 7.00
8.00 14.3%
SingleSource/Benchmarks/Misc/flops-6 7.00
8.00 14.3%
SingleSource/Benchmarks/Misc/flops-5 7.00
8.00 14.3%
SingleSour.../floyd-warshall/floyd-warshall 32.00
36.00 12.5%
MultiSourc...hmarks/MallocBench/cfrac/cfrac 33.00
29.00 -12.1% 5.00 5.00 0.0%
5.00 5.00 0.0%
SingleSour...ce/UnitTests/matrix-types-spec 2495.00
2218.00 -11.1% 38865.00 37481.00 -3.6%
58086.00 57734.00 -0.6%
MultiSourc...ch/consumer-lame/consumer-lame 719.00
660.00 -8.2% 29.00 29.00 0.0%
44.00 44.00 0.0%
External/S...2017rate/525.x264_r/525.x264_r 1414.00
1319.00 -6.7% 116.00 111.00 -4.3%
128.00 121.00 -5.5%
External/S...017speed/625.x264_s/625.x264_s 1414.00
1319.00 -6.7% 116.00 111.00 -4.3%
128.00 121.00 -5.5%
MultiSource/Benchmarks/Ptrdist/bc/bc 17.00
18.00 5.9%
MultiSource/Benchmarks/McCat/18-imp/imp 35.00
33.00 -5.7%
External/S...T2017speed/605.mcf_s/605.mcf_s 70.00
66.00 -5.7%
Geomean difference
-0.5% -0.9%
-1.1%
```
We have:
* `-0.5%` of `vsetvli`.
* `-0.9%` of vector spills.
* `-1.1%` of vector reloads.
https://github.com/llvm/llvm-project/pull/95924
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