cmd/internal/gc: shrink Node.Ostk to uint8

Change-Id: Ifda5d84b28717986c93b63767298180a6d6236c0
josharian · May 15, 2015 · 69cd9cd · 69cd9cd
1 parent f6482f7
commit 69cd9cd
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Showing 2 changed files with 4 additions and 4 deletions.
diff --git a/src/cmd/6g/ggen.go b/src/cmd/6g/ggen.go
@@ -306,7 +306,7 @@ func dodiv(op int, nl *gc.Node, nr *gc.Node, res *gc.Node) {
  * known to be dead.
  */
 func savex(dr int, x *gc.Node, oldx *gc.Node, res *gc.Node, t *gc.Type) {
-	r := int(reg[dr])
+	r := reg[dr]
 
 	// save current ax and dx if they are live
 	// and not the destination
@@ -318,15 +318,15 @@ func savex(dr int, x *gc.Node, oldx *gc.Node, res *gc.Node, t *gc.Type) {
 		x.Type = gc.Types[gc.TINT64]
 		gmove(x, oldx)
 		x.Type = t
-		oldx.Ostk = int32(r) // squirrel away old r value
+		oldx.Ostk = r // squirrel away old r value
 		reg[dr] = 1
 	}
 }
 
 func restx(x *gc.Node, oldx *gc.Node) {
 	if oldx.Op != 0 {
 		x.Type = gc.Types[gc.TINT64]
-		reg[x.Reg] = uint8(oldx.Ostk)
+		reg[x.Reg] = oldx.Ostk
 		gmove(oldx, x)
 		gc.Regfree(oldx)
 	}

diff --git a/src/cmd/internal/gc/syntax.go b/src/cmd/internal/gc/syntax.go
@@ -97,7 +97,7 @@ type Node struct {
 	Lineno   int32
 	Xoffset  int64
 	Stkdelta int64 // offset added by stack frame compaction phase.
-	Ostk     int32 // 6g only
+	Ostk     uint8 // 6g only
 	Iota     int32
 	Walkgen  uint32
 	Esclevel Level