cmd/compile: optimize 386's ADDLconstmodifyidx4
This CL optimize ADDLconstmodifyidx4 to INCL/DECL, when the
constant is +1/-1.
1. The total size of pkg/linux_386/ decreases 28 bytes, excluding
cmd/compile.
2. There is no regression in the go1 benchmark test, excluding noise.
name old time/op new time/op delta
BinaryTree17-4 3.25s ± 2% 3.23s ± 3% -0.70% (p=0.040 n=30+30)
Fannkuch11-4 3.50s ± 1% 3.47s ± 1% -0.68% (p=0.000 n=30+30)
FmtFprintfEmpty-4 44.6ns ± 3% 44.8ns ± 3% +0.46% (p=0.029 n=30+30)
FmtFprintfString-4 79.0ns ± 3% 78.7ns ± 3% ~ (p=0.053 n=30+30)
FmtFprintfInt-4 89.2ns ± 2% 89.4ns ± 3% ~ (p=0.665 n=30+29)
FmtFprintfIntInt-4 142ns ± 3% 142ns ± 3% ~ (p=0.435 n=30+30)
FmtFprintfPrefixedInt-4 182ns ± 2% 182ns ± 2% ~ (p=0.964 n=30+30)
FmtFprintfFloat-4 407ns ± 3% 411ns ± 4% ~ (p=0.080 n=30+30)
FmtManyArgs-4 597ns ± 3% 593ns ± 4% ~ (p=0.222 n=30+30)
GobDecode-4 7.09ms ± 6% 7.07ms ± 7% ~ (p=0.633 n=30+30)
GobEncode-4 6.81ms ± 9% 6.81ms ± 8% ~ (p=0.982 n=30+30)
Gzip-4 398ms ± 4% 400ms ± 6% ~ (p=0.177 n=30+30)
Gunzip-4 41.3ms ± 3% 40.6ms ± 4% -1.71% (p=0.005 n=30+30)
HTTPClientServer-4 63.4µs ± 3% 63.4µs ± 4% ~ (p=0.646 n=30+28)
JSONEncode-4 16.0ms ± 3% 16.1ms ± 3% ~ (p=0.057 n=30+30)
JSONDecode-4 63.3ms ± 8% 63.1ms ± 7% ~ (p=0.786 n=30+30)
Mandelbrot200-4 5.17ms ± 3% 5.15ms ± 8% ~ (p=0.654 n=30+30)
GoParse-4 3.24ms ± 3% 3.23ms ± 2% ~ (p=0.091 n=30+30)
RegexpMatchEasy0_32-4 103ns ± 4% 103ns ± 4% ~ (p=0.575 n=30+30)
RegexpMatchEasy0_1K-4 823ns ± 2% 821ns ± 3% ~ (p=0.827 n=30+30)
RegexpMatchEasy1_32-4 113ns ± 3% 112ns ± 3% ~ (p=0.076 n=30+30)
RegexpMatchEasy1_1K-4 1.02µs ± 4% 1.01µs ± 5% ~ (p=0.087 n=30+30)
RegexpMatchMedium_32-4 129ns ± 3% 127ns ± 4% -1.55% (p=0.009 n=30+30)
RegexpMatchMedium_1K-4 39.3µs ± 4% 39.7µs ± 3% ~ (p=0.054 n=30+30)
RegexpMatchHard_32-4 2.15µs ± 4% 2.15µs ± 4% ~ (p=0.712 n=30+30)
RegexpMatchHard_1K-4 66.0µs ± 3% 65.1µs ± 3% -1.32% (p=0.002 n=30+30)
Revcomp-4 1.85s ± 2% 1.85s ± 3% ~ (p=0.168 n=30+30)
Template-4 69.5ms ± 7% 68.9ms ± 6% ~ (p=0.250 n=28+28)
TimeParse-4 434ns ± 3% 432ns ± 4% ~ (p=0.629 n=30+30)
TimeFormat-4 403ns ± 4% 408ns ± 3% +1.23% (p=0.019 n=30+29)
[Geo mean] 65.5µs 65.3µs -0.20%
name old speed new speed delta
GobDecode-4 108MB/s ± 6% 109MB/s ± 6% ~ (p=0.636 n=30+30)
GobEncode-4 113MB/s ±10% 113MB/s ± 9% ~ (p=0.982 n=30+30)
Gzip-4 48.8MB/s ± 4% 48.6MB/s ± 5% ~ (p=0.178 n=30+30)
Gunzip-4 470MB/s ± 3% 479MB/s ± 4% +1.72% (p=0.006 n=30+30)
JSONEncode-4 121MB/s ± 3% 120MB/s ± 3% ~ (p=0.057 n=30+30)
JSONDecode-4 30.7MB/s ± 8% 30.8MB/s ± 8% ~ (p=0.784 n=30+30)
GoParse-4 17.9MB/s ± 3% 17.9MB/s ± 2% ~ (p=0.090 n=30+30)
RegexpMatchEasy0_32-4 309MB/s ± 4% 309MB/s ± 3% ~ (p=0.530 n=30+30)
RegexpMatchEasy0_1K-4 1.24GB/s ± 2% 1.25GB/s ± 3% ~ (p=0.976 n=30+30)
RegexpMatchEasy1_32-4 282MB/s ± 3% 284MB/s ± 3% +0.81% (p=0.041 n=30+30)
RegexpMatchEasy1_1K-4 1.00GB/s ± 3% 1.01GB/s ± 4% ~ (p=0.091 n=30+30)
RegexpMatchMedium_32-4 7.71MB/s ± 3% 7.84MB/s ± 4% +1.71% (p=0.000 n=30+30)
RegexpMatchMedium_1K-4 26.1MB/s ± 4% 25.8MB/s ± 3% ~ (p=0.051 n=30+30)
RegexpMatchHard_32-4 14.9MB/s ± 4% 14.9MB/s ± 4% ~ (p=0.712 n=30+30)
RegexpMatchHard_1K-4 15.5MB/s ± 3% 15.7MB/s ± 3% +1.34% (p=0.003 n=30+30)
Revcomp-4 138MB/s ± 2% 137MB/s ± 3% ~ (p=0.174 n=30+30)
Template-4 28.0MB/s ± 6% 28.2MB/s ± 6% ~ (p=0.251 n=28+28)
[Geo mean] 82.3MB/s 82.6MB/s +0.36%
Change-Id: I389829699ffe9500a013fcf31be58a97e98043e1
Reviewed-on: https://go-review.googlesource.com/c/140701
Run-TryBot: Ben Shi <powerman1st@163.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>