[turbofan] add configuration parameters for register allocator

src/compiler/instruction.h

 // Copyright 2014 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.
 
 #ifndef V8_COMPILER_INSTRUCTION_H_
 #define V8_COMPILER_INSTRUCTION_H_
 
 #include <deque>
 #include <iosfwd>
 #include <map>
 #include <set>
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/frame.h"
 #include "src/compiler/instruction-codes.h"
 #include "src/compiler/opcodes.h"
 #include "src/compiler/schedule.h"
 #include "src/compiler/source-position.h"
-// TODO(titzer): don't include the macro-assembler?
-#include "src/macro-assembler.h"
 #include "src/zone-allocator.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // Forward declarations.
 class Linkage;
 
 // A couple of reserved opcodes are used for internal use.
 const InstructionCode kGapInstruction = -1;
 const InstructionCode kBlockStartInstruction = -2;
 const InstructionCode kSourcePositionInstruction = -3;
 
+// Platform independent maxes.
+static const int kMaxGeneralRegisters = 32;
+static const int kMaxDoubleRegisters = 32;
 
-#define INSTRUCTION_OPERAND_LIST(V)              \
-  V(Constant, CONSTANT, 0)                       \
-  V(Immediate, IMMEDIATE, 0)                     \
-  V(StackSlot, STACK_SLOT, 128)                  \
-  V(DoubleStackSlot, DOUBLE_STACK_SLOT, 128)     \
-  V(Register, REGISTER, Register::kNumRegisters) \
-  V(DoubleRegister, DOUBLE_REGISTER, DoubleRegister::kMaxNumRegisters)
+
+#define INSTRUCTION_OPERAND_LIST(V)           \
+  V(Constant, CONSTANT, 0)                    \
+  V(Immediate, IMMEDIATE, 0)                  \
+  V(StackSlot, STACK_SLOT, 128)               \
+  V(DoubleStackSlot, DOUBLE_STACK_SLOT, 128)  \
+  V(Register, REGISTER, kMaxGeneralRegisters) \
+  V(DoubleRegister, DOUBLE_REGISTER, kMaxDoubleRegisters)
 
 class InstructionOperand : public ZoneObject {
  public:
   enum Kind {
     INVALID,
     UNALLOCATED,
     CONSTANT,
     IMMEDIATE,
     STACK_SLOT,
     DOUBLE_STACK_SLOT,
@@ skipping 927 matching lines @@
   DeoptimizationVector deoptimization_entries_;
 };
 
 std::ostream& operator<<(std::ostream& os, const InstructionSequence& code);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_H_