Reland and fix "Add support for keyed-call on arrays of fast elements"

src/ia32/lithium-ia32.cc

Index: src/ia32/lithium-ia32.cc
diff --git a/src/ia32/lithium-ia32.cc b/src/ia32/lithium-ia32.cc
index 29b42fe0ffc7d1377e9d616fff8e7b8b2ab2275d..278d60030464f8ba83de548fcc6196ed7cb11342 100644
--- a/src/ia32/lithium-ia32.cc
+++ b/src/ia32/lithium-ia32.cc
@@ -1410,8 +1410,10 @@ LInstruction* LChunkBuilder::DoCallNewArray(HCallNewArray* instr) {
 LInstruction* LChunkBuilder::DoCallFunction(HCallFunction* instr) {
   LOperand* context = UseFixed(instr->context(), esi);
   LOperand* function = UseFixed(instr->function(), edi);
-  LCallFunction* result = new(zone()) LCallFunction(context, function);
-  return MarkAsCall(DefineFixed(result, eax), instr);
+  LCallFunction* call = new(zone()) LCallFunction(context, function);
+  LInstruction* result = DefineFixed(call, eax);
+  if (instr->IsTailCall()) return result;
+  return MarkAsCall(result, instr);
 }