cmd/compile/internal/gc: shrink Sym by 8 bytes on amd64

Move 8-bit flags field after 32-bit Block field

Change-Id: I8e5e9a2285477aac2402a839a105e710d5340224
Reviewed-on: https://go-review.googlesource.com/37848
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

diff --git a/src/cmd/compile/internal/gc/go.go b/src/cmd/compile/internal/gc/go.go
index 8dcb9faed2f5f469cd6d68bedc3f5e5ce83f4594..5b12aad6847a8380f95520171ce86e1a37b93ae6 100644 (file)
--- a/src/cmd/compile/internal/gc/go.go
+++ b/src/cmd/compile/internal/gc/go.go
@@ -51,15 +51,14 @@ type Sym struct {
        Pkg        *Pkg
        Name       string   // object name
        Def        *Node    // definition: ONAME OTYPE OPACK or OLITERAL
-       Block      int32    // blocknumber to catch redeclaration
        Lastlineno src.XPos // last declaration for diagnostic
+       Block      int32    // blocknumber to catch redeclaration
 
+       flags   bitset8
        Label   *Node // corresponding label (ephemeral)
        Origpkg *Pkg  // original package for . import
        Lsym    *obj.LSym
        Fsym    *Sym // funcsym
-
-       flags bitset8
 }
 
 const (

diff --git a/src/cmd/compile/internal/gc/sizeof_test.go b/src/cmd/compile/internal/gc/sizeof_test.go
index 4e1d42b88e73b3d9689cf56deca4d2fb28612c25..55b400f3966aa766e522faa5f60fa1907e43d61f 100644 (file)
--- a/src/cmd/compile/internal/gc/sizeof_test.go
+++ b/src/cmd/compile/internal/gc/sizeof_test.go
@@ -26,7 +26,7 @@ func TestSizeof(t *testing.T) {
                {Name{}, 36, 56},
                {Param{}, 28, 56},
                {Node{}, 84, 136},
-               {Sym{}, 64, 120},
+               {Sym{}, 64, 112},
                {Type{}, 60, 96},
                {MapType{}, 20, 40},
                {ForwardType{}, 20, 32},