Enable api tests on ARM.

runtime/vm/stub_code_x64.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_X64)
 
 #include "vm/assembler.h"
 #include "vm/compiler.h"
 #include "vm/dart_entry.h"
@@ skipping 298 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         |
+//   | 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,
                                            bool preserve_rax) {
   __ EnterFrame(0);
   // The code in this frame may not cause GC. kDeoptimizeCopyFrameRuntimeEntry
   // and kDeoptimizeFillFrameRuntimeEntry are leaf runtime calls.
   const intptr_t saved_rax_offset_from_ebp = -(kNumberOfCpuRegisters - RAX);
   // Result in EAX is preserved as part of pushing all registers below.
 
   // Push registers in their enumeration order: lowest register number at
   // lowest address.
   for (intptr_t i = kNumberOfCpuRegisters - 1; i >= 0; i--) {
     __ pushq(static_cast<Register>(i));
   }
   __ subq(RSP, 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(RSP, offset), xmm_reg);
     offset += kFpuRegisterSize;
   }
 
-  __ movq(RCX, RSP);  // Saved saved registers block.
+  __ movq(RDI, RSP);  // Pass address of saved registers block.
   __ ReserveAlignedFrameSpace(0);
-  __ SmiUntag(RAX);
-  __ movq(RDI, RCX);  // Set up argument 1 saved_registers_address.
-
   __ CallRuntime(kDeoptimizeCopyFrameRuntimeEntry);
   // Result (RAX) is stack-size (FP - SP) in bytes, incl. the return address.
 
   if (preserve_rax) {
     // Restore result into RBX temporarily.
     __ movq(RBX, Address(RBP, saved_rax_offset_from_ebp * kWordSize));
   }
 
   __ LeaveFrame();
   __ popq(RCX);   // Preserve return address.
@@ skipping 1692 matching lines @@
   __ cmpq(left, right);
   __ Bind(&done);
   __ popq(right);
   __ popq(left);
   __ ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64