Use IC register definitions in platform files.

src/arm64/ic-arm64.cc

 // Copyright 2013 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_ARM64
 
 #include "src/arm64/assembler-arm64.h"
 #include "src/code-stubs.h"
@@ skipping 394 matching lines @@
   return MemOperand(backing_store, scratch, LSL, kPointerSizeLog2);
 }
 
 
 void LoadIC::GenerateMegamorphic(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- x2    : name
   //  -- lr    : return address
   //  -- x0    : receiver
   // -----------------------------------
+  ASSERT(x0.is(ReceiverRegister()));
+  ASSERT(x2.is(NameRegister()));
 
   // Probe the stub cache.
   Code::Flags flags = Code::ComputeHandlerFlags(Code::LOAD_IC);
   masm->isolate()->stub_cache()->GenerateProbe(
       masm, flags, x0, x2, x3, x4, x5, x6);
 
   // Cache miss: Jump to runtime.
   GenerateMiss(masm);
 }
 
 
 void LoadIC::GenerateNormal(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- x2    : name
   //  -- lr    : return address
   //  -- x0    : receiver
   // -----------------------------------
+  ASSERT(x0.is(ReceiverRegister()));
+  ASSERT(x2.is(NameRegister()));
   Label miss, slow;
 
   GenerateNameDictionaryReceiverCheck(masm, x0, x1, x3, x4, &miss);
 
   // x1 now holds the property dictionary.
   GenerateDictionaryLoad(masm, &slow, x1, x2, x0, x3, x4);
   __ Ret();
 
   // Dictionary load failed, go slow (but don't miss).
   __ Bind(&slow);
   GenerateRuntimeGetProperty(masm);
 
   // Cache miss: Jump to runtime.
   __ Bind(&miss);
   GenerateMiss(masm);
 }
 
 
 void LoadIC::GenerateMiss(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- x2    : name
-  //  -- lr    : return address
-  //  -- x0    : receiver
-  // -----------------------------------
+  // The return address is on the stack.
   Isolate* isolate = masm->isolate();
   ASM_LOCATION("LoadIC::GenerateMiss");
 
   __ IncrementCounter(isolate->counters()->load_miss(), 1, x3, x4);
 
   // Perform tail call to the entry.
-  __ Push(x0, x2);
+  __ Push(ReceiverRegister(), NameRegister());
   ExternalReference ref =
       ExternalReference(IC_Utility(kLoadIC_Miss), isolate);
   __ TailCallExternalReference(ref, 2, 1);
 }
 
 
 void LoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm) {
-  // ---------- S t a t e --------------
-  //  -- x2    : name
-  //  -- lr    : return address
-  //  -- x0    : receiver
-  // -----------------------------------
-
-  __ Push(x0, x2);
+  // The return address is on the stack.
+  __ Push(ReceiverRegister(), NameRegister());
   __ TailCallRuntime(Runtime::kGetProperty, 2, 1);
 }
 
 
 void KeyedLoadIC::GenerateSloppyArguments(MacroAssembler* masm) {
   // ---------- S t a t e --------------
   //  -- lr     : return address
   //  -- x0     : key
   //  -- x1     : receiver
   // -----------------------------------
   Register result = x0;
-  Register key = x0;
-  Register receiver = x1;
+  Register receiver = ReceiverRegister();
+  Register key = NameRegister();
+  ASSERT(receiver.is(x1));
+  ASSERT(key.is(x0));
+
   Label miss, unmapped;
 
   Register map_scratch = x2;
   MemOperand mapped_location = GenerateMappedArgumentsLookup(
       masm, receiver, key, map_scratch, x3, x4, &unmapped, &miss);
   __ Ldr(result, mapped_location);
   __ Ret();
 
   __ Bind(&unmapped);
   // Parameter map is left in map_scratch when a jump on unmapped is done.
@@ skipping 11 matching lines @@
 
 
 void KeyedStoreIC::GenerateSloppyArguments(MacroAssembler* masm) {
   ASM_LOCATION("KeyedStoreIC::GenerateSloppyArguments");
   // ---------- S t a t e --------------
   //  -- lr     : return address
   //  -- x0     : value
   //  -- x1     : key
   //  -- x2     : receiver
   // -----------------------------------
-
   Label slow, notin;
 
   Register value = x0;
   Register key = x1;
   Register receiver = x2;
   Register map = x3;
 
   // These registers are used by GenerateMappedArgumentsLookup to build a
   // MemOperand. They are live for as long as the MemOperand is live.
   Register mapped1 = x4;
@@ skipping 24 matching lines @@
   __ Mov(x11, value);
   __ RecordWrite(unmapped.base(), x10, x11,
                  kLRHasNotBeenSaved, kDontSaveFPRegs);
   __ Ret();
   __ Bind(&slow);
   GenerateMiss(masm);
 }
 
 
 void KeyedLoadIC::GenerateMiss(MacroAssembler* masm) {
-  // ---------- S t a t e --------------
-  //  -- lr     : return address
-  //  -- x0     : key
-  //  -- x1     : receiver
-  // -----------------------------------
+  // The return address is on the stack.
   Isolate* isolate = masm->isolate();
 
   __ IncrementCounter(isolate->counters()->keyed_load_miss(), 1, x10, x11);
 
-  __ Push(x1, x0);
+  __ Push(ReceiverRegister(), NameRegister());
 
   // Perform tail call to the entry.
   ExternalReference ref =
       ExternalReference(IC_Utility(kKeyedLoadIC_Miss), isolate);
 
   __ TailCallExternalReference(ref, 2, 1);
 }
 
 
 // IC register specifications
 const Register LoadIC::ReceiverRegister() { return x0; }
 const Register LoadIC::NameRegister() { return x2; }
 const Register KeyedLoadIC::ReceiverRegister() { return x1; }
 const Register KeyedLoadIC::NameRegister() { return x0; }
 
 
 void KeyedLoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm) {
-  // ---------- S t a t e --------------
-  //  -- lr     : return address
-  //  -- x0     : key
-  //  -- x1     : receiver
-  // -----------------------------------
-  Register key = x0;
-  Register receiver = x1;
-
-  __ Push(receiver, key);
+  // The return address is on the stack.
+  __ Push(ReceiverRegister(), NameRegister());
   __ TailCallRuntime(Runtime::kKeyedGetProperty, 2, 1);
 }
 
 
 static void GenerateKeyedLoadWithSmiKey(MacroAssembler* masm,
                                         Register key,
                                         Register receiver,
                                         Register scratch1,
                                         Register scratch2,
                                         Register scratch3,
@@ skipping 155 matching lines @@
 
 
 void KeyedLoadIC::GenerateGeneric(MacroAssembler* masm) {
   // ---------- S t a t e --------------
   //  -- lr     : return address
   //  -- x0     : key
   //  -- x1     : receiver
   // -----------------------------------
   Label slow, check_name, index_smi, index_name;
 
-  Register key = x0;
-  Register receiver = x1;
+  Register key = NameRegister();
+  Register receiver = ReceiverRegister();
+  ASSERT(key.is(x0));
+  ASSERT(receiver.is(x1));
 
   __ JumpIfNotSmi(key, &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.
   GenerateKeyedLoadWithSmiKey(masm, key, receiver, x2, x3, x4, x5, x6, &slow);
 
   // Slow case, key and receiver still in x0 and x1.
   __ Bind(&slow);
   __ IncrementCounter(
       masm->isolate()->counters()->keyed_load_generic_slow(), 1, x2, x3);
   GenerateRuntimeGetProperty(masm);
 
   __ Bind(&check_name);
   GenerateKeyNameCheck(masm, key, x2, x3, &index_name, &slow);
 
   GenerateKeyedLoadWithNameKey(masm, key, receiver, x2, x3, x4, x5, x6, &slow);
 
   __ Bind(&index_name);
   __ IndexFromHash(x3, key);
   // Now jump to the place where smi keys are handled.
   __ B(&index_smi);
 }
 
 
 void KeyedLoadIC::GenerateString(MacroAssembler* masm) {
-  // ---------- S t a t e --------------
-  //  -- lr     : return address
-  //  -- x0     : key (index)
-  //  -- x1     : receiver
-  // -----------------------------------
+  // Return address is on the stack.
   Label miss;
 
-  Register index = x0;
-  Register receiver = x1;
+  Register receiver = ReceiverRegister();
+  Register index = NameRegister();
   Register result = x0;
   Register scratch = x3;
+  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();
 
   StubRuntimeCallHelper call_helper;
   char_at_generator.GenerateSlow(masm, call_helper);
 
   __ Bind(&miss);
   GenerateMiss(masm);
 }
 
 
 void KeyedLoadIC::GenerateIndexedInterceptor(MacroAssembler* masm) {
-  // ---------- S t a t e --------------
-  //  -- lr     : return address
-  //  -- x0     : key
-  //  -- x1     : receiver
-  // -----------------------------------
+  // Return address is on the stack.
   Label slow;
-  Register key = x0;
-  Register receiver = x1;
+
+  Register receiver = ReceiverRegister();
+  Register key = NameRegister();
+  Register scratch1 = x2;
+  Register scratch2 = x3;
+  ASSERT(!scratch1.is(receiver) && !scratch1.is(key));
+  ASSERT(!scratch2.is(receiver) && !scratch2.is(key));
 
   // Check that the receiver isn't a smi.
   __ JumpIfSmi(receiver, &slow);
 
   // Check that the key is an array index, that is Uint32.
   __ TestAndBranchIfAnySet(key, kSmiTagMask | kSmiSignMask, &slow);
 
   // Get the map of the receiver.
-  Register map = x2;
+  Register map = scratch1;
   __ Ldr(map, FieldMemOperand(receiver, HeapObject::kMapOffset));
 
   // Check that it has indexed interceptor and access checks
   // are not enabled for this object.
-  __ Ldrb(x3, FieldMemOperand(map, Map::kBitFieldOffset));
+  __ Ldrb(scratch2, FieldMemOperand(map, Map::kBitFieldOffset));
   ASSERT(kSlowCaseBitFieldMask ==
       ((1 << Map::kIsAccessCheckNeeded) | (1 << Map::kHasIndexedInterceptor)));
-  __ Tbnz(x3, Map::kIsAccessCheckNeeded, &slow);
-  __ Tbz(x3, Map::kHasIndexedInterceptor, &slow);
+  __ Tbnz(scratch2, Map::kIsAccessCheckNeeded, &slow);
+  __ Tbz(scratch2, Map::kHasIndexedInterceptor, &slow);
 
   // Everything is fine, call runtime.
   __ Push(receiver, key);
   __ TailCallExternalReference(
       ExternalReference(IC_Utility(kKeyedLoadPropertyWithInterceptor),
                         masm->isolate()),
       2,
       1);
 
   __ Bind(&slow);
@@ skipping 512 matching lines @@
     ASSERT(to_patch->Mask(TestBranchMask) == TBNZ);
     // This is JumpIfSmi(smi_reg, branch_imm).
     patcher.tbz(smi_reg, 0, branch_imm);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64