From fdbba5eb702a945c0a72ae5c4ab00c5579730f4a Mon Sep 17 00:00:00 2001
From: Alon Zakai <alonzakai@gmail.com>
Date: Thu, 21 Jul 2016 16:07:30 -0700
Subject: support wasm globals (#650)

---
 src/ast_utils.h | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'src/ast_utils.h')

diff --git a/src/ast_utils.h b/src/ast_utils.h
index 77bfaf1f3..3e45d0e33 100644
--- a/src/ast_utils.h
+++ b/src/ast_utils.h
@@ -160,6 +160,8 @@ struct EffectAnalyzer : public PostWalker<EffectAnalyzer, Visitor<EffectAnalyzer
   void visitSetLocal(SetLocal *curr) {
     localsWritten.insert(curr->index);
   }
+  void visitGetGlobal(GetGlobal *curr) { readsMemory = true; }  // TODO: global-specific
+  void visitSetGlobal(SetGlobal *curr) { writesMemory = true; } //       stuff?
   void visitLoad(Load *curr) { readsMemory = true; }
   void visitStore(Store *curr) { writesMemory = true; }
   void visitReturn(Return *curr) { branches = true; }
@@ -277,6 +279,12 @@ struct ExpressionManipulator {
       Expression* visitSetLocal(SetLocal *curr) {
         return builder.makeSetLocal(curr->index, copy(curr->value));
       }
+      Expression* visitGetGlobal(GetGlobal *curr) {
+        return builder.makeGetGlobal(curr->index, curr->type);
+      }
+      Expression* visitSetGlobal(SetGlobal *curr) {
+        return builder.makeSetGlobal(curr->index, copy(curr->value));
+      }
       Expression* visitLoad(Load *curr) {
         return builder.makeLoad(curr->bytes, curr->signed_, curr->offset, curr->align, copy(curr->ptr), curr->type);
       }
@@ -476,6 +484,15 @@ struct ExpressionAnalyzer {
           PUSH(SetLocal, value);
           break;
         }
+        case Expression::Id::GetGlobalId: {
+          CHECK(GetGlobal, index);
+          break;
+        }
+        case Expression::Id::SetGlobalId: {
+          CHECK(SetGlobal, index);
+          PUSH(SetGlobal, value);
+          break;
+        }
         case Expression::Id::LoadId: {
           CHECK(Load, bytes);
           CHECK(Load, signed_);
@@ -678,6 +695,15 @@ struct ExpressionAnalyzer {
           PUSH(SetLocal, value);
           break;
         }
+        case Expression::Id::GetGlobalId: {
+          HASH(GetGlobal, index);
+          break;
+        }
+        case Expression::Id::SetGlobalId: {
+          HASH(SetGlobal, index);
+          PUSH(SetGlobal, value);
+          break;
+        }
         case Expression::Id::LoadId: {
           HASH(Load, bytes);
           HASH(Load, signed_);
-- 
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