Eliminate unused function KeyedStoreIC::GenerateExtendStorage, and unused...

Eliminate unused function KeyedStoreIC::GenerateExtendStorage, and unused parameter from StubCompiler::GenerateStoreField.
Review URL: http://codereview.chromium.org/575022

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3824 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/ic-arm.cc

@@ -788,23 +788,6 @@ void KeyedStoreIC::GenerateExternalArray(MacroAssembler* masm,
 }
 
 
-void KeyedStoreIC::GenerateExtendStorage(MacroAssembler* masm) {
-  // ---------- S t a t e --------------
-  //  -- r0     : value
-  //  -- lr     : return address
-  //  -- sp[0]  : key
-  //  -- sp[1]  : receiver
-  // ----------- S t a t e -------------
-
-  __ ldm(ia, sp, r2.bit() | r3.bit());
-  __ stm(db_w, sp, r0.bit() | r2.bit() | r3.bit());
-
-  // Perform tail call to the entry.
-  __ TailCallRuntime(
-      ExternalReference(IC_Utility(kSharedStoreIC_ExtendStorage)), 3, 1);
-}
-
-
 void StoreIC::GenerateMegamorphic(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- r0    : value
@@ -825,23 +808,6 @@ void StoreIC::GenerateMegamorphic(MacroAssembler* masm) {
 }
 
 
-void StoreIC::GenerateExtendStorage(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- r0    : value
-  //  -- r2    : name
-  //  -- lr    : return address
-  //  -- [sp]  : receiver
-  // -----------------------------------
-
-  __ ldr(r3, MemOperand(sp));  // copy receiver
-  __ stm(db_w, sp, r0.bit() | r2.bit() | r3.bit());
-
-  // Perform tail call to the entry.
-  __ TailCallRuntime(
-      ExternalReference(IC_Utility(kSharedStoreIC_ExtendStorage)), 3, 1);
-}
-
-
 void StoreIC::GenerateMiss(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- r0    : value

src/arm/stub-cache-arm.cc

@@ -261,7 +261,6 @@ void StubCompiler::GenerateLoadFunctionPrototype(MacroAssembler* masm,
 // After executing generated code, the receiver_reg and name_reg
 // may be clobbered.
 void StubCompiler::GenerateStoreField(MacroAssembler* masm,
-                                      Builtins::Name storage_extend,
                                       JSObject* object,
                                       int index,
                                       Map* transition,
@@ -294,11 +293,12 @@ void StubCompiler::GenerateStoreField(MacroAssembler* masm,
   if ((transition != NULL) && (object->map()->unused_property_fields() == 0)) {
     // The properties must be extended before we can store the value.
     // We jump to a runtime call that extends the properties array.
+    __ push(receiver_reg);
     __ mov(r2, Operand(Handle<Map>(transition)));
-    // Please note, if we implement keyed store for arm we need
-    // to call the Builtins::KeyedStoreIC_ExtendStorage.
-    Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_ExtendStorage));
-    __ Jump(ic, RelocInfo::CODE_TARGET);
+    __ stm(db_w, sp, r2.bit() | r0.bit());
+    __ TailCallRuntime(
+           ExternalReference(IC_Utility(IC::kSharedStoreIC_ExtendStorage)),
+           3, 1);
     return;
   }
 
@@ -1215,7 +1215,6 @@ Object* StoreStubCompiler::CompileStoreField(JSObject* object,
 
   // name register might be clobbered.
   GenerateStoreField(masm(),
-                     Builtins::StoreIC_ExtendStorage,
                      object,
                      index,
                      transition,
@@ -1719,7 +1718,6 @@ Object* KeyedStoreStubCompiler::CompileStoreField(JSObject* object,
   __ ldr(r3, MemOperand(sp));
   // r1 is used as scratch register, r3 and r2 might be clobbered.
   GenerateStoreField(masm(),
-                     Builtins::StoreIC_ExtendStorage,
                      object,
                      index,
                      transition,

src/builtins.cc

@@ -668,10 +668,6 @@ static void Generate_StoreIC_Miss(MacroAssembler* masm) {
 }
 
 
-static void Generate_StoreIC_ExtendStorage(MacroAssembler* masm) {
-  StoreIC::GenerateExtendStorage(masm);
-}
-
 static void Generate_StoreIC_Megamorphic(MacroAssembler* masm) {
   StoreIC::GenerateMegamorphic(masm);
 }
@@ -720,11 +716,6 @@ static void Generate_KeyedStoreIC_ExternalFloatArray(MacroAssembler* masm) {
 }
 
 
-static void Generate_KeyedStoreIC_ExtendStorage(MacroAssembler* masm) {
-  KeyedStoreIC::GenerateExtendStorage(masm);
-}
-
-
 static void Generate_KeyedStoreIC_Miss(MacroAssembler* masm) {
   KeyedStoreIC::GenerateMiss(masm);
 }

src/builtins.h

@@ -69,9 +69,6 @@ enum BuiltinExtraArguments {
   V(StoreIC_Miss,               BUILTIN, UNINITIALIZED)                   \
   V(KeyedStoreIC_Miss,          BUILTIN, UNINITIALIZED)                   \
                                                                           \
-  V(StoreIC_ExtendStorage,      BUILTIN, UNINITIALIZED)                   \
-  V(KeyedStoreIC_ExtendStorage, BUILTIN, UNINITIALIZED)                   \
-                                                                          \
   V(LoadIC_Initialize,          LOAD_IC, UNINITIALIZED)                   \
   V(LoadIC_PreMonomorphic,      LOAD_IC, PREMONOMORPHIC)                  \
   V(LoadIC_Normal,              LOAD_IC, MONOMORPHIC)                     \

src/ia32/ic-ia32.cc

@@ -1385,26 +1385,6 @@ void StoreIC::GenerateMegamorphic(MacroAssembler* masm) {
 }
 
 
-void StoreIC::GenerateExtendStorage(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- eax    : value
-  //  -- ecx    : transition map
-  //  -- edx    : receiver
-  //  -- esp[0] : return address
-  // -----------------------------------
-
-  __ pop(ebx);
-  __ push(edx);  // receiver
-  __ push(ecx);  // transition map
-  __ push(eax);  // value
-  __ push(ebx);  // return address
-
-  // Perform tail call to the entry.
-  __ TailCallRuntime(
-      ExternalReference(IC_Utility(kSharedStoreIC_ExtendStorage)), 3, 1);
-}
-
-
 void StoreIC::GenerateMiss(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- eax    : value
@@ -1464,27 +1444,6 @@ void KeyedStoreIC::GenerateMiss(MacroAssembler* masm) {
   __ TailCallRuntime(ExternalReference(IC_Utility(kKeyedStoreIC_Miss)), 3, 1);
 }
 
-
-void KeyedStoreIC::GenerateExtendStorage(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- eax    : value
-  //  -- ecx    : transition map
-  //  -- esp[0] : return address
-  //  -- esp[4] : key
-  //  -- esp[8] : receiver
-  // -----------------------------------
-
-  __ pop(ebx);
-  __ push(Operand(esp, 1 * kPointerSize));
-  __ push(ecx);
-  __ push(eax);
-  __ push(ebx);
-
-  // Do tail-call to runtime routine.
-  __ TailCallRuntime(
-      ExternalReference(IC_Utility(kSharedStoreIC_ExtendStorage)), 3, 1);
-}
-
 #undef __
 
 

src/ia32/stub-cache-ia32.cc

@@ -607,8 +607,9 @@ void StubCompiler::GenerateLoadMiss(MacroAssembler* masm, Code::Kind kind) {
 }
 
 
+// Both name_reg and receiver_reg are preserved on jumps to miss_label,
+// but may be destroyed if store is successful.
 void StubCompiler::GenerateStoreField(MacroAssembler* masm,
-                                      Builtins::Name storage_extend,
                                       JSObject* object,
                                       int index,
                                       Map* transition,
@@ -638,9 +639,13 @@ void StubCompiler::GenerateStoreField(MacroAssembler* masm,
   if ((transition != NULL) && (object->map()->unused_property_fields() == 0)) {
     // The properties must be extended before we can store the value.
     // We jump to a runtime call that extends the properties array.
-    __ mov(ecx, Immediate(Handle<Map>(transition)));
-    Handle<Code> ic(Builtins::builtin(storage_extend));
-    __ jmp(ic, RelocInfo::CODE_TARGET);
+    __ pop(scratch);  // Return address.
+    __ push(receiver_reg);
+    __ push(Immediate(Handle<Map>(transition)));
+    __ push(eax);
+    __ push(scratch);
+    __ TailCallRuntime(
+        ExternalReference(IC_Utility(IC::kSharedStoreIC_ExtendStorage)), 3, 1);
     return;
   }
 
@@ -1251,7 +1256,6 @@ Object* StoreStubCompiler::CompileStoreField(JSObject* object,
 
   // Generate store field code.  Trashes the name register.
   GenerateStoreField(masm(),
-                     Builtins::StoreIC_ExtendStorage,
                      object,
                      index,
                      transition,
@@ -1425,15 +1429,14 @@ Object* KeyedStoreStubCompiler::CompileStoreField(JSObject* object,
   __ j(not_equal, &miss, not_taken);
 
   // Get the object from the stack.
-  __ mov(ebx, Operand(esp, 2 * kPointerSize));
+  __ mov(edx, Operand(esp, 2 * kPointerSize));
 
   // Generate store field code.  Trashes the name register.
   GenerateStoreField(masm(),
-                     Builtins::KeyedStoreIC_ExtendStorage,
                      object,
                      index,
                      transition,
-                     ebx, ecx, edx,
+                     edx, ecx, ebx,
                      &miss);
 
   // Handle store cache miss.

src/ic.h

@@ -352,7 +352,6 @@ class StoreIC: public IC {
   static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); }
   static void GenerateMiss(MacroAssembler* masm);
   static void GenerateMegamorphic(MacroAssembler* masm);
-  static void GenerateExtendStorage(MacroAssembler* masm);
 
  private:
   // Update the inline cache and the global stub cache based on the
@@ -389,7 +388,6 @@ class KeyedStoreIC: public IC {
   static void GenerateMiss(MacroAssembler* masm);
   static void GenerateRuntimeSetProperty(MacroAssembler* masm);
   static void GenerateGeneric(MacroAssembler* masm);
-  static void GenerateExtendStorage(MacroAssembler* masm);
 
   // Generators for external array types. See objects.h.
   // These are similar to the generic IC; they optimize the case of

src/stub-cache.h

@@ -369,7 +369,6 @@ class StubCompiler BASE_EMBEDDED {
                                             Label* miss_label);
 
   static void GenerateStoreField(MacroAssembler* masm,
-                                 Builtins::Name storage_extend,
                                  JSObject* object,
                                  int index,
                                  Map* transition,

src/x64/ic-x64.cc

@@ -611,27 +611,6 @@ void KeyedStoreIC::GenerateRuntimeSetProperty(MacroAssembler* masm) {
 }
 
 
-void KeyedStoreIC::GenerateExtendStorage(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- rax     : value
-  //  -- rcx     : transition map
-  //  -- rsp[0]  : return address
-  //  -- rsp[8]  : key
-  //  -- rsp[16] : receiver
-  // -----------------------------------
-
-  __ pop(rbx);
-  __ push(Operand(rsp, 1 * kPointerSize));  // receiver
-  __ push(rcx);  // transition map
-  __ push(rax);  // value
-  __ push(rbx);  // return address
-
-  // Do tail-call to runtime routine.
-  __ TailCallRuntime(
-      ExternalReference(IC_Utility(kSharedStoreIC_ExtendStorage)), 3, 1);
-}
-
-
 void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- rax    : value
@@ -1308,7 +1287,6 @@ void LoadIC::GenerateStringLength(MacroAssembler* masm) {
 }
 
 
-
 bool LoadIC::PatchInlinedLoad(Address address, Object* map, int offset) {
   // The address of the instruction following the call.
   Address test_instruction_address =
@@ -1336,6 +1314,7 @@ bool LoadIC::PatchInlinedLoad(Address address, Object* map, int offset) {
   return true;
 }
 
+
 void StoreIC::GenerateMiss(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- rax    : value
@@ -1354,24 +1333,6 @@ void StoreIC::GenerateMiss(MacroAssembler* masm) {
   __ TailCallRuntime(ExternalReference(IC_Utility(kStoreIC_Miss)), 3, 1);
 }
 
-void StoreIC::GenerateExtendStorage(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- rax    : value
-  //  -- rcx    : Map (target of map transition)
-  //  -- rdx    : receiver
-  //  -- rsp[0] : return address
-  // -----------------------------------
-
-  __ pop(rbx);
-  __ push(rdx);  // receiver
-  __ push(rcx);  // transition map
-  __ push(rax);  // value
-  __ push(rbx);  // return address
-
-  // Perform tail call to the entry.
-  __ TailCallRuntime(
-      ExternalReference(IC_Utility(kSharedStoreIC_ExtendStorage)), 3, 1);
-}
 
 void StoreIC::GenerateMegamorphic(MacroAssembler* masm) {
   // ----------- S t a t e -------------

src/x64/stub-cache-x64.cc

@@ -201,8 +201,9 @@ void StubCache::GenerateProbe(MacroAssembler* masm,
 }
 
 
+// Both name_reg and receiver_reg are preserved on jumps to miss_label,
+// but may be destroyed if store is successful.
 void StubCompiler::GenerateStoreField(MacroAssembler* masm,
-                                      Builtins::Name storage_extend,
                                       JSObject* object,
                                       int index,
                                       Map* transition,
@@ -231,9 +232,13 @@ void StubCompiler::GenerateStoreField(MacroAssembler* masm,
   if ((transition != NULL) && (object->map()->unused_property_fields() == 0)) {
     // The properties must be extended before we can store the value.
     // We jump to a runtime call that extends the properties array.
-    __ Move(rcx, Handle<Map>(transition));
-    Handle<Code> ic(Builtins::builtin(storage_extend));
-    __ Jump(ic, RelocInfo::CODE_TARGET);
+    __ pop(scratch);  // Return address.
+    __ push(receiver_reg);
+    __ Push(Handle<Map>(transition));
+    __ push(rax);
+    __ push(scratch);
+    __ TailCallRuntime(
+        ExternalReference(IC_Utility(IC::kSharedStoreIC_ExtendStorage)), 3, 1);
     return;
   }
 
@@ -1399,9 +1404,8 @@ Object* StoreStubCompiler::CompileStoreField(JSObject* object,
   // -----------------------------------
   Label miss;
 
-  // Generate store field code.  Trashes the name register.
+  // Generate store field code.  Preserves receiver and name on jump to miss.
   GenerateStoreField(masm(),
-                     Builtins::StoreIC_ExtendStorage,
                      object,
                      index,
                      transition,
@@ -1410,7 +1414,6 @@ Object* StoreStubCompiler::CompileStoreField(JSObject* object,
 
   // Handle store cache miss.
   __ bind(&miss);
-  __ Move(rcx, Handle<String>(name));  // restore name
   Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Miss));
   __ Jump(ic, RelocInfo::CODE_TARGET);
 
@@ -1552,16 +1555,15 @@ Object* KeyedStoreStubCompiler::CompileStoreField(JSObject* object,
   __ Cmp(rcx, Handle<String>(name));
   __ j(not_equal, &miss);
 
-  // Get the object from the stack.
-  __ movq(rbx, Operand(rsp, 2 * kPointerSize));
+  // Get the receiver from the stack.
+  __ movq(rdx, Operand(rsp, 2 * kPointerSize));
 
-  // Generate store field code.  Trashes the name register.
+  // Generate store field code.  Preserves receiver and name on jump to miss.
   GenerateStoreField(masm(),
-                     Builtins::KeyedStoreIC_ExtendStorage,
                      object,
                      index,
                      transition,
-                     rbx, rcx, rdx,
+                     rdx, rcx, rbx,
                      &miss);
 
   // Handle store cache miss.