Use a different map to distinguish eval contexts

src/crankshaft/ia32/lithium-codegen-ia32.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_IA32
 
 #include "src/crankshaft/ia32/lithium-codegen-ia32.h"
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 159 matching lines @@
     // Argument to NewContext is the function, which is still in edi.
     int slots = info_->scope()->num_heap_slots() - Context::MIN_CONTEXT_SLOTS;
     Safepoint::DeoptMode deopt_mode = Safepoint::kNoLazyDeopt;
     if (info()->scope()->is_script_scope()) {
       __ push(edi);
       __ Push(info()->scope()->scope_info());
       __ CallRuntime(Runtime::kNewScriptContext);
       deopt_mode = Safepoint::kLazyDeopt;
     } else {
       if (slots <= FastNewFunctionContextStub::kMaximumSlots) {
-        FastNewFunctionContextStub stub(isolate());
-        __ mov(FastNewFunctionContextDescriptor::SlotsRegister(),
-               Immediate(slots));
-        __ CallStub(&stub);
+        if (info()->scope()->is_eval_scope()) {
+          FastNewEvalContextStub stub(isolate());
+          __ Set(FastNewEvalContextDescriptor::SlotsRegister(), slots);
+          __ CallStub(&stub);
+        } else {
+          FastNewFunctionContextStub stub(isolate());
+          __ Set(FastNewFunctionContextDescriptor::SlotsRegister(), slots);
+          __ CallStub(&stub);
+        }
         // Result of FastNewFunctionContextStub is always in new space.
         need_write_barrier = false;
       } else {
-        __ push(edi);
-        __ CallRuntime(Runtime::kNewFunctionContext);
+        __ Push(edi);
+        __ CallRuntime(info()->scope()->is_eval_scope()
+                           ? Runtime::kNewEvalContext
+                           : Runtime::kNewFunctionContext);
       }
     }
     RecordSafepoint(deopt_mode);
 
     // Context is returned in eax.  It replaces the context passed to us.
     // It's saved in the stack and kept live in esi.
     __ mov(esi, eax);
     __ mov(Operand(ebp, StandardFrameConstants::kContextOffset), eax);
 
     // Copy parameters into context if necessary.
@@ skipping 4950 matching lines @@
   __ bind(deferred->exit());
   __ bind(&done);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_IA32