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dart2js-kernel: Emit error trap for unimplemented features
The test will fail with an error like the following, rather than proceed with an incorrect null value. R=efortuna@google.com Review URL: https://codereview.chromium.org/2540363002 . TypeError: Cannot read property 'Unhandled ir.FunctionExpression (dynamic x) → dynamic => x' of null
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@ -380,8 +380,17 @@ class KernelSsaBuilder extends ir.Visitor with GraphBuilder {
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@override
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void defaultExpression(ir.Expression expression) {
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// TODO(het): This is only to get tests working
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stack.add(graph.addConstantNull(compiler));
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// TODO(het): This is only to get tests working.
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String message = 'Unhandled ir.${expression.runtimeType} $expression';
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HInstruction nullValue = graph.addConstantNull(compiler);
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HInstruction errorMessage =
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graph.addConstantString(new DartString.literal(message), compiler);
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HInstruction trap = new HForeignCode(
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js.js.parseForeignJS("#.#"),
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backend.dynamicType,
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<HInstruction>[nullValue, errorMessage]);
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trap.sideEffects..setAllSideEffects()..setDependsOnSomething();
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push(trap);
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}
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/// Returns the current source element.
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