From: Agniva De Sarker <agnivade@yahoo.co.in>
Date: Thu, 10 Oct 2019 07:01:43 +0000 (+0530)
Subject: runtime,internal/bytealg: optimize wasmZero, wasmMove, Compare
X-Git-Tag: go1.14beta1~786
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=d0f10a6e68b3cd1a0bb8536317cae4e850f38ba5;p=gostls13.git

runtime,internal/bytealg: optimize wasmZero, wasmMove, Compare

Coalesce set/get pairs into a tee.

Change-Id: I88ccdcb148465615437bebf24145e941a037e0a5
Reviewed-on: https://go-review.googlesource.com/c/go/+/200357
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Richard Musiol <neelance@gmail.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
---

diff --git a/src/internal/bytealg/compare_wasm.s b/src/internal/bytealg/compare_wasm.s
index 2d28215b1a..dc8fb33cfb 100644
--- a/src/internal/bytealg/compare_wasm.s
+++ b/src/internal/bytealg/compare_wasm.s
@@ -45,9 +45,8 @@ TEXT cmpbody<>(SB), NOSPLIT, $0-0
 	I32WrapI64
 	Call memcmp<>(SB)
 	I64ExtendI32S
-	Set R5
+	Tee R5
 
-	Get R5
 	I64Eqz
 	If
 		// check length
diff --git a/src/runtime/sys_wasm.s b/src/runtime/sys_wasm.s
index 0cd1fe5080..41260bdf23 100644
--- a/src/runtime/sys_wasm.s
+++ b/src/runtime/sys_wasm.s
@@ -17,10 +17,9 @@ loop:
 		Get R2
 		I32Const $1
 		I32Sub
-		Set R2
+		Tee R2
 
 		// n == 0
-		Get R2
 		I32Eqz
 		If
 			Return
@@ -54,10 +53,9 @@ loop:
 		Get R1
 		I32Const $1
 		I32Sub
-		Set R1
+		Tee R1
 
 		// n == 0
-		Get R1
 		I32Eqz
 		If
 			Return