Subzero: Control memory growth from local label fixups.

src/IceOperand.h

Index: src/IceOperand.h
diff --git a/src/IceOperand.h b/src/IceOperand.h
index 888e4df2f52b124eb0dbed809487580dd10501f1..bc48b74da0639623550479d341a400dc5ec01dde 100644
--- a/src/IceOperand.h
+++ b/src/IceOperand.h
@@ -270,8 +270,8 @@ class RelocOffset final {
   RelocOffset &operator=(const RelocOffset &) = delete;
 
 public:
-  static RelocOffset *create(GlobalContext *Ctx) {
-    return new (Ctx->allocate<RelocOffset>()) RelocOffset();
+  template <typename T> static RelocOffset *create(T *AllocOwner) {
+    return new (AllocOwner->template allocate<RelocOffset>()) RelocOffset();
   }
 
   static RelocOffset *create(GlobalContext *Ctx, RelocOffsetT Value) {
@@ -342,10 +342,12 @@ class ConstantRelocatable : public Constant {
   ConstantRelocatable &operator=(const ConstantRelocatable &) = delete;
 
 public:
-  static ConstantRelocatable *create(GlobalContext *Ctx, Type Ty,
+  template <typename T>
+  static ConstantRelocatable *create(T *AllocOwner, Type Ty,
                                      const RelocatableTuple &Tuple) {
-    return new (Ctx->allocate<ConstantRelocatable>()) ConstantRelocatable(
-        Ty, Tuple.Offset, Tuple.OffsetExpr, Tuple.Name, Tuple.EmitString);
+    return new (AllocOwner->template allocate<ConstantRelocatable>())
+        ConstantRelocatable(Ty, Tuple.Offset, Tuple.OffsetExpr, Tuple.Name,
+                            Tuple.EmitString);
   }
 
   RelocOffsetT getOffset() const {