[turbofan] Optimized lowering of DYNAMIC_GLOBAL lookup slot loads.

src/compiler/operator-properties.cc

Index: src/compiler/operator-properties.cc
diff --git a/src/compiler/operator-properties.cc b/src/compiler/operator-properties.cc
index 01acf0f7182152dba66c4980ec3ce44171174ac7..4a7f1d9a2c2a06047cc0dcd1e979f4ae83459363 100644
--- a/src/compiler/operator-properties.cc
+++ b/src/compiler/operator-properties.cc
@@ -49,7 +49,6 @@ int OperatorProperties::GetFrameStateInputCount(const Operator* op) {
     case IrOpcode::kJSCreateLiteralObject:
 
     // Context operations
-    case IrOpcode::kJSLoadDynamicGlobal:
     case IrOpcode::kJSLoadDynamicContext:
     case IrOpcode::kJSCreateScriptContext:
     case IrOpcode::kJSCreateWithContext:
@@ -67,11 +66,12 @@ int OperatorProperties::GetFrameStateInputCount(const Operator* op) {
       return 1;
 
     // We record the frame state immediately before and immediately after
-    // every property access.
+    // every property or global variable access.
     case IrOpcode::kJSLoadNamed:
     case IrOpcode::kJSStoreNamed:
     case IrOpcode::kJSLoadProperty:
     case IrOpcode::kJSStoreProperty:
+    case IrOpcode::kJSLoadDynamicGlobal:
       return 2;
 
     // Binary operators that can deopt in the middle the operation (e.g.,