dart2js: Allow 'throw' when inlining

sdk/lib/_internal/compiler/implementation/ssa/codegen.dart

Index: sdk/lib/_internal/compiler/implementation/ssa/codegen.dart
diff --git a/sdk/lib/_internal/compiler/implementation/ssa/codegen.dart b/sdk/lib/_internal/compiler/implementation/ssa/codegen.dart
index 42f055a7eda9f9a03265b893735585b4d292ce2d..aad5148e5584aeb7fa0582f10f78900b1d9d8161 100644
--- a/sdk/lib/_internal/compiler/implementation/ssa/codegen.dart
+++ b/sdk/lib/_internal/compiler/implementation/ssa/codegen.dart
@@ -1995,6 +1995,26 @@ abstract class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
     pushStatement(new js.Throw(value));
   }
 
+  visitThrowExpression(HThrowExpression node) {
+    HInstruction argument = node.inputs[0];
+    use(argument);
+
+    Element helper = compiler.findHelper(new SourceString("throwExpression"));
+    world.registerStaticUse(helper);
+
+    // The helper uses the non-throwing helper, so we have to register that
+    // both are used.
+    Element nonThrowingHelper =
+        compiler.findHelper(new SourceString(r"$throw"));
+    world.registerStaticUse(nonThrowingHelper);

[ngeoffray, 2013/04/10 12:06:39]

the compilation of throwExpression will figure that out, so no need to do it
explicitly.

[erikcorry, 2013/04/10 12:52:32]

Done.

+
+    js.VariableUse jsHelper =
+        new js.VariableUse(backend.namer.isolateAccess(helper));
+    js.Call value = new js.Call(jsHelper, [pop()]);
+    attachLocation(value, argument);
+    push(value, node);
+  }
+
   void visitSwitch(HSwitch node) {
     // Switches are handled using [visitSwitchInfo].
   }