WIP: Register allocator crash repro.

src/code-stub-assembler.cc

Index: src/code-stub-assembler.cc
diff --git a/src/code-stub-assembler.cc b/src/code-stub-assembler.cc
index 53f52b504d6eef27da6d564f5dfee2e5e32071c6..aab9a50c8ec90365b4bea4b5941c5cd5d33c2e13 100644
--- a/src/code-stub-assembler.cc
+++ b/src/code-stub-assembler.cc
@@ -1309,6 +1309,25 @@ Node* CodeStubAssembler::BitFieldDecode(Node* word32, uint32_t shift,
                    Int32Constant(shift));
 }
 
+void CodeStubAssembler::Boom() {
+  Label block1(this, Label::kDeferred);
+  Goto(&block1);
+  Bind(&block1);
+  {
+    Variable var_object(this, MachineRepresentation::kTagged);
+    Label loop(this, &var_object);
+    var_object.Bind(IntPtrConstant(0));
+    Goto(&loop);
+    Bind(&loop);
+    {
+      Node* map = LoadMap(var_object.value());
+
+      var_object.Bind(map);
+      Goto(&loop);
+    }
+  }
+}
+
 void CodeStubAssembler::TryToName(Node* key, Label* if_keyisindex,
                                   Variable* var_index, Label* if_keyisunique,
                                   Label* call_runtime) {