From 342764a21606ba6f964400cc747ee6c9a88fc959 Mon Sep 17 00:00:00 2001
From: Iskander Sharipov <quasilyte@gmail.com>
Date: Mon, 26 Nov 2018 11:40:32 +0300
Subject: [PATCH] runtime/pprof/internal/profile: use idiomatic swapping

gogrep found only one such case with the pattern below:

	$tmp := $x; $x = $y; $y = $tmp

R=1.13

Change-Id: I6e46fb5ef2887f24fa9fc451323a8cef272e2886
Reviewed-on: https://go-review.googlesource.com/c/151200
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
---
 src/runtime/pprof/internal/profile/profile.go | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/runtime/pprof/internal/profile/profile.go b/src/runtime/pprof/internal/profile/profile.go
index a6f8354b1e8..443accdd6d3 100644
--- a/src/runtime/pprof/internal/profile/profile.go
+++ b/src/runtime/pprof/internal/profile/profile.go
@@ -211,9 +211,7 @@ func (p *Profile) setMain() {
 			continue
 		}
 		// Swap what we guess is main to position 0.
-		tmp := p.Mapping[i]
-		p.Mapping[i] = p.Mapping[0]
-		p.Mapping[0] = tmp
+		p.Mapping[i], p.Mapping[0] = p.Mapping[0], p.Mapping[i]
 		break
 	}
 }