[turbofan] Fix phi-hinting problem with deferred blocks

test/cctest/compiler/test-code-stub-assembler.cc

Index: test/cctest/compiler/test-code-stub-assembler.cc
diff --git a/test/cctest/compiler/test-code-stub-assembler.cc b/test/cctest/compiler/test-code-stub-assembler.cc
index 37ba9e9904fa7148e3f4f15e8551fbc8d62b36af..25a01984eee0e28f1d05c796efae12808476c6bb 100644
--- a/test/cctest/compiler/test-code-stub-assembler.cc
+++ b/test/cctest/compiler/test-code-stub-assembler.cc
@@ -389,6 +389,31 @@ TEST(TestToConstant) {
   CHECK(!m.ToInt64Constant(a, value64));
 }
 
+TEST(DeferredCodePhiHints) {
+  typedef compiler::Node Node;
+  typedef CodeStubAssembler::Label Label;
+  typedef CodeStubAssembler::Variable Variable;
+  Isolate* isolate(CcTest::InitIsolateOnce());
+  VoidDescriptor descriptor(isolate);
+  CodeStubAssemblerTester m(isolate, descriptor);
+  Label block1(&m, Label::kDeferred);
+  m.Goto(&block1);
+  m.Bind(&block1);
+  {
+    Variable var_object(&m, MachineRepresentation::kTagged);
+    Label loop(&m, &var_object);
+    var_object.Bind(m.IntPtrConstant(0));
+    m.Goto(&loop);
+    m.Bind(&loop);
+    {
+      Node* map = m.LoadMap(var_object.value());
+      var_object.Bind(map);
+      m.Goto(&loop);
+    }
+  }
+  USE(m.GenerateCode());

[Mircea Trofin, 2016/06/01 15:02:58]

Why not CHECK there was code generated?

[danno, 2016/06/02 01:29:37]

Done.

+}
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8