Property extraction getters (tear-offs) are effect-free

pkg/compiler/lib/src/ssa/nodes.dart

Index: pkg/compiler/lib/src/ssa/nodes.dart
diff --git a/pkg/compiler/lib/src/ssa/nodes.dart b/pkg/compiler/lib/src/ssa/nodes.dart
index 1b06943251b20d45cd1608838019d5e6c55dcd0b..fd35edd45cdae5c9c61508d36502305c884a7ed6 100644
--- a/pkg/compiler/lib/src/ssa/nodes.dart
+++ b/pkg/compiler/lib/src/ssa/nodes.dart
@@ -1627,6 +1627,10 @@ class HInvokeDynamicGetter extends HInvokeDynamicField {
       : super(selector, mask, element, inputs, type);
   toString() => 'invoke dynamic getter: selector=$selector, mask=$mask';
   accept(HVisitor visitor) => visitor.visitInvokeDynamicGetter(this);
+
+  bool get isTearOff => element != null && element.isFunction;
+
+  bool canThrow() => isTearOff ? inputs.last.canBeNull() : super.canThrow();

[Siggi Cherem (dart-lang), 2016/10/18 23:26:02]

inputs should be a single element right? maybe do inputs.single?

[sra1, 2016/10/19 02:16:57]

There might be an interceptor, e.g  [].add;
'getDartReceiver' takes the 'compiler'.
I'll add a comment.

 }
 
 class HInvokeDynamicSetter extends HInvokeDynamicField {