Cache current thread in a reserved register and use it in LoadIsolate

runtime/vm/assembler_ia32_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/os.h"
@@ skipping 3375 matching lines @@
   EXPECT_EQ(to[0], '0');
   for (int i = 0; i < 10; i++) {
     EXPECT_EQ(from[i], to[i]);
   }
   delete [] to;
 }
 
 
 // Called from assembler_test.cc.
 ASSEMBLER_TEST_GENERATE(StoreIntoObject, assembler) {
+  __ pushl(THR);
   __ pushl(CTX);
-  __ movl(CTX, Address(ESP, 2 * kWordSize));
-  __ movl(EAX, Address(ESP, 3 * kWordSize));
-  __ movl(ECX, Address(ESP, 4 * kWordSize));
+  __ movl(CTX, Address(ESP, 3 * kWordSize));
+  __ movl(EAX, Address(ESP, 4 * kWordSize));
+  __ movl(ECX, Address(ESP, 5 * kWordSize));
+  __ movl(THR, Address(ESP, 6 * kWordSize));
   __ pushl(EAX);
   __ StoreIntoObject(ECX,
                      FieldAddress(ECX, GrowableObjectArray::data_offset()),
                      EAX);
   __ popl(EAX);
   __ popl(CTX);
+  __ popl(THR);
   __ ret();
 }
 
 
 ASSEMBLER_TEST_GENERATE(BitTest, assembler) {
   __ movl(EAX, Immediate(4));
   __ movl(ECX, Immediate(2));
   __ bt(EAX, ECX);
   Label ok;
   __ j(CARRY, &ok);
@@ skipping 57 matching lines @@
   EXPECT_EQ(ICData::kInt64RangeBit, range_of(Integer::New(kMaxInt64)));
   EXPECT_EQ(ICData::kInt64RangeBit, range_of(Integer::New(kMinInt64)));
 
   EXPECT_EQ(-1, range_of(Bool::True().raw()));
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32