commit 8712e1867b47e3b741f399c9be0f1e32252a792c
author Dave Cheney <dave@cheney.net> Mon Sep 07 11:11:14 2015 +1000
committer Dave Cheney <dave@cheney.net> Mon Sep 07 21:35:06 2015 +0000
tree b6c3dbeebcc1941c9a09117a0121d917fa46d9c9
parent 0388d4303fbcc9cc0ed7949a2fb759ee4bd0ea47

cmd/compile/internal/gc: convert Label.Used to bool

Convert Label.Used to a boolean. Also move the field to the
bottom of the struct to avoid padding.

This change passes go build -toolexec 'toolstash -cmp' -a std.

Change-Id: If09ee92f9d54dce807e7b862cf771005daed810d
Reviewed-on: https://go-review.googlesource.com/14308
Run-TryBot: Dave Cheney <dave@cheney.net>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/cmd/compile/internal/gc/gen.go

diff --git a/src/cmd/compile/internal/gc/gen.go b/src/cmd/compile/internal/gc/gen.go
index 355210b..22d8a1e 100644
--- a/src/cmd/compile/internal/gc/gen.go
+++ b/src/cmd/compile/internal/gc/gen.go
@@ -729,7 +729,7 @@
 				break
 			}
 
-			lab.Used = 1
+			lab.Used = true
 			if lab.Breakpc == nil {
 				Yyerror("invalid break label %v", n.Left.Sym)
 				break
@@ -754,7 +754,7 @@
 				break
 			}
 
-			lab.Used = 1
+			lab.Used = true
 			if lab.Continpc == nil {
 				Yyerror("invalid continue label %v", n.Left.Sym)
 				break
@@ -994,7 +994,7 @@
 			continue
 		}
 
-		if lab.Use == nil && lab.Used == 0 {
+		if lab.Use == nil && !lab.Used {
 			yyerrorl(int(lab.Def.Lineno), "label %v defined and not used", lab.Sym)
 			continue
 		}

src/cmd/compile/internal/gc/go.go

diff --git a/src/cmd/compile/internal/gc/go.go b/src/cmd/compile/internal/gc/go.go
index 8c7328f..91838ff 100644
--- a/src/cmd/compile/internal/gc/go.go
+++ b/src/cmd/compile/internal/gc/go.go
@@ -217,7 +217,6 @@
 }
 
 type Label struct {
-	Used uint8
 	Sym  *Sym
 	Def  *Node
 	Use  []*Node
@@ -228,6 +227,8 @@
 	Labelpc  *obj.Prog // pointer to code
 	Breakpc  *obj.Prog // pointer to code
 	Continpc *obj.Prog // pointer to code
+
+	Used bool
 }
 
 type InitEntry struct {