* Added check for HeapNumber in the fast-cast Smi switch.

src/codegen-arm.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1229 matching lines @@
     SwitchStatement* node,
     int min_index,
     int range,
     Label* fail_label,
     Vector<Label*> case_targets,
     Vector<Label> case_labels) {
 
   ASSERT(kSmiTag == 0 && kSmiTagSize <= 2);
 
   __ pop(r0);
+
+  // Test for a Smi value in a HeapNumber.
+  Label is_smi;
+  __ tst(r0, Operand(kSmiTagMask));
+  __ b(eq, &is_smi);
+  __ ldr(r1, MemOperand(r0, HeapObject::kMapOffset - kHeapObjectTag));
+  __ ldrb(r1, MemOperand(r1, Map::kInstanceTypeOffset - kHeapObjectTag));
+  __ cmp(r1, Operand(HEAP_NUMBER_TYPE));
+  __ b(ne, fail_label);
+  __ push(r0);
+  __ CallRuntime(Runtime::kNumberToSmi, 1);
+  __ bind(&is_smi);
+
   if (min_index != 0) {
     // small positive numbers can be immediate operands.
     if (min_index < 0) {
       __ add(r0, r0, Operand(Smi::FromInt(-min_index)));
     } else {
       __ sub(r0, r0, Operand(Smi::FromInt(min_index)));
     }
   }
   __ tst(r0, Operand(0x80000000 | kSmiTagMask));
   __ b(ne, fail_label);
@@ skipping 2950 matching lines @@
   // Slow-case: Non-function called.
   __ bind(&slow);
   __ mov(r0, Operand(argc_));  // Setup the number of arguments.
   __ InvokeBuiltin(Builtins::CALL_NON_FUNCTION, JUMP_JS);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal