Fix issue 1968, replace usage of inline 'asm' constructs in 'stack alignment', 'jump to exception h…

vm/assembler_x64.h

 // 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.
 
 #ifndef VM_ASSEMBLER_X64_H_
 #define VM_ASSEMBLER_X64_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_x64.h directly; use assembler.h instead.
 #endif
 
 #include "platform/assert.h"
 #include "platform/utils.h"
 #include "vm/constants_x64.h"
 
 namespace dart {
 
 // Forward declarations.
 class RuntimeEntry;
 
-
-#if defined(TESTING) || defined(DEBUG)
-
-#if defined(TARGET_OS_WINDOWS)
-// The compiler may dynamically align the stack on Windows, so do not check.
-#define CHECK_STACK_ALIGNMENT { }
-#else
-#define CHECK_STACK_ALIGNMENT {                                                \
-  uword current_sp;                                                            \
-  asm volatile("mov %%rsp, %[current_sp]" : [current_sp] "=r" (current_sp));   \
-  ASSERT((OS::ActivationFrameAlignment() == 0) ||                              \
-         (Utils::IsAligned(current_sp, OS::ActivationFrameAlignment())));      \
-}
-#endif
-
-#else
-
-#define CHECK_STACK_ALIGNMENT { }
-
-#endif
-
-
 class Immediate : public ValueObject {
  public:
   explicit Immediate(int64_t value) : value_(value) { }
 
   int64_t value() const { return value_; }
 
   bool is_int8() const { return Utils::IsInt(8, value_); }
   bool is_uint8() const { return Utils::IsUint(8, value_); }
   bool is_uint16() const { return Utils::IsUint(16, value_); }
   bool is_int32() const { return Utils::IsInt(32, value_); }
@@ skipping 620 matching lines @@
 }
 
 
 inline void Assembler::EmitOperandSizeOverride() {
   EmitUint8(0x66);
 }
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_X64_H_