Enable api tests on ARM.

runtime/vm/stub_code_ia32.cc

 // Copyright (c) 2013, 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/compiler.h"
 #include "vm/dart_entry.h"
@@ skipping 304 matching lines @@
 // This stub translates optimized frame into unoptimized frame. The optimized
 // frame can contain values in registers and on stack, the unoptimized
 // frame contains all values on stack.
 // Deoptimization occurs in following steps:
 // - Push all registers that can contain values.
 // - Call C routine to copy the stack and saved registers into temporary buffer.
 // - Adjust caller's frame to correct unoptimized frame size.
 // - Fill the unoptimized frame.
 // - Materialize objects that require allocation (e.g. Double instances).
 // GC can occur only after frame is fully rewritten.
-// Stack:
+// Stack after EnterFrame(0) below:
 //   +------------------+
 //   | Saved FP         | <- TOS
 //   +------------------+
 //   | return-address   |  (deoptimization point)
 //   +------------------+
 //   | optimized frame  |
 //   |  ...             |
 //
 // Parts of the code cannot GC, part of the code can GC.
 static void GenerateDeoptimizationSequence(Assembler* assembler,
@@ skipping 10 matching lines @@
     __ pushl(static_cast<Register>(i));
   }
   __ subl(ESP, Immediate(kNumberOfXmmRegisters * kFpuRegisterSize));
   intptr_t offset = 0;
   for (intptr_t reg_idx = 0; reg_idx < kNumberOfXmmRegisters; ++reg_idx) {
     XmmRegister xmm_reg = static_cast<XmmRegister>(reg_idx);
     __ movups(Address(ESP, offset), xmm_reg);
     offset += kFpuRegisterSize;
   }
 
-  __ movl(ECX, ESP);  // Saved saved registers block.
+  __ movl(ECX, ESP);  // Preserve saved registers block.
   __ ReserveAlignedFrameSpace(1 * kWordSize);
-  __ SmiUntag(EAX);
   __ movl(Address(ESP, 0), ECX);  // Start of register block.
   __ CallRuntime(kDeoptimizeCopyFrameRuntimeEntry);
   // Result (EAX) is stack-size (FP - SP) in bytes, incl. the return address.
 
   if (preserve_eax) {
     // Restore result into EBX temporarily.
     __ movl(EBX, Address(EBP, saved_eax_offset_from_ebp * kWordSize));
   }
 
   __ LeaveFrame();
@@ skipping 1732 matching lines @@
   __ Bind(&done);
   __ popl(temp);
   __ popl(right);
   __ popl(left);
   __ ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32