Use IC register definitions in platform files.

src/x64/ic-x64.cc

 // Copyright 2012 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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/codegen.h"
 #include "src/ic-inl.h"
@@ skipping 314 matching lines @@
 }
 
 
 
 void KeyedLoadIC::GenerateGeneric(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- rax    : key
   //  -- rdx    : receiver
   //  -- rsp[0] : return address
   // -----------------------------------
+  ASSERT(rdx.is(ReceiverRegister()));
+  ASSERT(rax.is(NameRegister()));
   Label slow, check_name, index_smi, index_name, property_array_property;
   Label probe_dictionary, check_number_dictionary;
 
   // Check that the key is a smi.
   __ JumpIfNotSmi(rax, &check_name);
   __ bind(&index_smi);
   // Now the key is known to be a smi. This place is also jumped to from below
   // where a numeric string is converted to a smi.
 
   GenerateKeyedLoadReceiverCheck(
@@ skipping 138 matching lines @@
   __ IncrementCounter(counters->keyed_load_generic_symbol(), 1);
   __ ret(0);
 
   __ bind(&index_name);
   __ IndexFromHash(rbx, rax);
   __ jmp(&index_smi);
 }
 
 
 void KeyedLoadIC::GenerateString(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- rax    : key
-  //  -- rdx    : receiver
-  //  -- rsp[0] : return address
-  // -----------------------------------
+  // Return address is on the stack.
   Label miss;
 
-  Register receiver = rdx;
-  Register index = rax;
+  Register receiver = ReceiverRegister();
+  Register index = NameRegister();
   Register scratch = rcx;
   Register result = rax;
+  ASSERT(!scratch.is(receiver) && !scratch.is(index));
 
   StringCharAtGenerator char_at_generator(receiver,
                                           index,
                                           scratch,
                                           result,
                                           &miss,  // When not a string.
                                           &miss,  // When not a number.
                                           &miss,  // When index out of range.
                                           STRING_INDEX_IS_ARRAY_INDEX);
   char_at_generator.GenerateFast(masm);
   __ ret(0);
 
   StubRuntimeCallHelper call_helper;
   char_at_generator.GenerateSlow(masm, call_helper);
 
   __ bind(&miss);
   GenerateMiss(masm);
 }
 
 
 void KeyedLoadIC::GenerateIndexedInterceptor(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- rax    : key
-  //  -- rdx    : receiver
-  //  -- rsp[0] : return address
-  // -----------------------------------
+  // Return address is on the stack.
   Label slow;
 
+  Register receiver = ReceiverRegister();
+  Register key = NameRegister();
+  Register scratch = rcx;
+  ASSERT(!scratch.is(receiver) && !scratch.is(key));
+
   // Check that the receiver isn't a smi.
-  __ JumpIfSmi(rdx, &slow);
+  __ JumpIfSmi(receiver, &slow);
 
   // Check that the key is an array index, that is Uint32.
   STATIC_ASSERT(kSmiValueSize <= 32);
-  __ JumpUnlessNonNegativeSmi(rax, &slow);
+  __ JumpUnlessNonNegativeSmi(key, &slow);
 
   // Get the map of the receiver.
-  __ movp(rcx, FieldOperand(rdx, HeapObject::kMapOffset));
+  __ movp(scratch, FieldOperand(receiver, HeapObject::kMapOffset));
 
   // Check that it has indexed interceptor and access checks
   // are not enabled for this object.
-  __ movb(rcx, FieldOperand(rcx, Map::kBitFieldOffset));
-  __ andb(rcx, Immediate(kSlowCaseBitFieldMask));
-  __ cmpb(rcx, Immediate(1 << Map::kHasIndexedInterceptor));
+  __ movb(scratch, FieldOperand(scratch, Map::kBitFieldOffset));
+  __ andb(scratch, Immediate(kSlowCaseBitFieldMask));
+  __ cmpb(scratch, Immediate(1 << Map::kHasIndexedInterceptor));
   __ j(not_zero, &slow);
 
   // Everything is fine, call runtime.
-  __ PopReturnAddressTo(rcx);
-  __ Push(rdx);  // receiver
-  __ Push(rax);  // key
-  __ PushReturnAddressFrom(rcx);
+  __ PopReturnAddressTo(scratch);
+  __ Push(receiver);  // receiver
+  __ Push(key);       // key
+  __ PushReturnAddressFrom(scratch);
 
   // Perform tail call to the entry.
   __ TailCallExternalReference(
       ExternalReference(IC_Utility(kKeyedLoadPropertyWithInterceptor),
                         masm->isolate()),
       2,
       1);
 
   __ bind(&slow);
   GenerateMiss(masm);
@@ skipping 321 matching lines @@
                       FixedArray::kHeaderSize);
 }
 
 
 void KeyedLoadIC::GenerateSloppyArguments(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- rax    : key
   //  -- rdx    : receiver
   //  -- rsp[0] : return address
   // -----------------------------------
+  ASSERT(rdx.is(ReceiverRegister()));
+  ASSERT(rax.is(NameRegister()));
   Label slow, notin;
   Operand mapped_location =
       GenerateMappedArgumentsLookup(
           masm, rdx, rax, rbx, rcx, rdi, &notin, &slow);
   __ movp(rax, mapped_location);
   __ Ret();
   __ bind(&notin);
   // The unmapped lookup expects that the parameter map is in rbx.
   Operand unmapped_location =
       GenerateUnmappedArgumentsLookup(masm, rax, rbx, rcx, &slow);
@@ skipping 44 matching lines @@
   GenerateMiss(masm);
 }
 
 
 void LoadIC::GenerateMegamorphic(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- rax    : receiver
   //  -- rcx    : name
   //  -- rsp[0] : return address
   // -----------------------------------
+  ASSERT(rax.is(ReceiverRegister()));
+  ASSERT(rcx.is(NameRegister()));
 
   // Probe the stub cache.
   Code::Flags flags = Code::ComputeHandlerFlags(Code::LOAD_IC);
   masm->isolate()->stub_cache()->GenerateProbe(
       masm, flags, rax, rcx, rbx, rdx);
 
   GenerateMiss(masm);
 }
 
 
 void LoadIC::GenerateNormal(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- rax    : receiver
   //  -- rcx    : name
   //  -- rsp[0] : return address
   // -----------------------------------
+  ASSERT(rax.is(ReceiverRegister()));
+  ASSERT(rcx.is(NameRegister()));
   Label miss, slow;
 
   GenerateNameDictionaryReceiverCheck(masm, rax, rdx, rbx, &miss);
 
   //  rdx: elements
   // Search the dictionary placing the result in rax.
   GenerateDictionaryLoad(masm, &slow, rdx, rcx, rbx, rdi, rax);
   __ ret(0);
 
   // Dictionary load failed, go slow (but don't miss).
   __ bind(&slow);
   GenerateRuntimeGetProperty(masm);
 
   // Cache miss: Jump to runtime.
   __ bind(&miss);
   GenerateMiss(masm);
 }
 
 
+// A register that isn't one of the parameters to the load ic.
+static const Register LoadIC_TempRegister() { return rbx; }
+
+
+static const Register KeyedLoadIC_TempRegister() {
+  return rbx;
+}
+
+
 void LoadIC::GenerateMiss(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- rax    : receiver
-  //  -- rcx    : name
-  //  -- rsp[0] : return address
-  // -----------------------------------
+  // The return address is on the stack.
 
   Counters* counters = masm->isolate()->counters();
   __ IncrementCounter(counters->load_miss(), 1);
 
-  __ PopReturnAddressTo(rbx);
-  __ Push(rax);  // receiver
-  __ Push(rcx);  // name
-  __ PushReturnAddressFrom(rbx);
+  __ PopReturnAddressTo(LoadIC_TempRegister());
+  __ Push(ReceiverRegister());  // receiver
+  __ Push(NameRegister());  // name
+  __ PushReturnAddressFrom(LoadIC_TempRegister());
 
   // Perform tail call to the entry.
   ExternalReference ref =
       ExternalReference(IC_Utility(kLoadIC_Miss), masm->isolate());
   __ TailCallExternalReference(ref, 2, 1);
 }
 
 
 void LoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- rax    : receiver
-  //  -- rcx    : name
-  //  -- rsp[0] : return address
-  // -----------------------------------
+  // The return address is on the stack.
 
-  __ PopReturnAddressTo(rbx);
-  __ Push(rax);  // receiver
-  __ Push(rcx);  // name
-  __ PushReturnAddressFrom(rbx);
+  __ PopReturnAddressTo(LoadIC_TempRegister());
+  __ Push(ReceiverRegister());  // receiver
+  __ Push(NameRegister());  // name
+  __ PushReturnAddressFrom(LoadIC_TempRegister());
 
   // Perform tail call to the entry.
   __ TailCallRuntime(Runtime::kGetProperty, 2, 1);
 }
 
 
 void KeyedLoadIC::GenerateMiss(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- rax    : key
-  //  -- rdx    : receiver
-  //  -- rsp[0] : return address
-  // -----------------------------------
-
+  // The return address is on the stack.
   Counters* counters = masm->isolate()->counters();
   __ IncrementCounter(counters->keyed_load_miss(), 1);
 
-  __ PopReturnAddressTo(rbx);
-  __ Push(rdx);  // receiver
-  __ Push(rax);  // name
-  __ PushReturnAddressFrom(rbx);
+  __ PopReturnAddressTo(KeyedLoadIC_TempRegister());
+  __ Push(ReceiverRegister());  // receiver
+  __ Push(NameRegister());  // name
+  __ PushReturnAddressFrom(KeyedLoadIC_TempRegister());
 
   // Perform tail call to the entry.
   ExternalReference ref =
       ExternalReference(IC_Utility(kKeyedLoadIC_Miss), masm->isolate());
   __ TailCallExternalReference(ref, 2, 1);
 }
 
 
 // IC register specifications
 const Register LoadIC::ReceiverRegister() { return rax; }
 const Register LoadIC::NameRegister() { return rcx; }
 const Register KeyedLoadIC::ReceiverRegister() { return rdx; }
 const Register KeyedLoadIC::NameRegister() { return rax; }
 
 
 void KeyedLoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- rax    : key
-  //  -- rdx    : receiver
-  //  -- rsp[0] : return address
-  // -----------------------------------
+  // The return address is on the stack.
 
-  __ PopReturnAddressTo(rbx);
-  __ Push(rdx);  // receiver
-  __ Push(rax);  // name
-  __ PushReturnAddressFrom(rbx);
+  __ PopReturnAddressTo(KeyedLoadIC_TempRegister());
+  __ Push(ReceiverRegister());  // receiver
+  __ Push(NameRegister());  // name
+  __ PushReturnAddressFrom(KeyedLoadIC_TempRegister());
 
   // Perform tail call to the entry.
   __ TailCallRuntime(Runtime::kKeyedGetProperty, 2, 1);
 }
 
 
 void StoreIC::GenerateMegamorphic(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- rax    : value
   //  -- rcx    : name
@@ skipping 226 matching lines @@
   Condition cc = (check == ENABLE_INLINED_SMI_CHECK)
       ? (*jmp_address == Assembler::kJncShortOpcode ? not_zero : zero)
       : (*jmp_address == Assembler::kJnzShortOpcode ? not_carry : carry);
   *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | cc);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64