/deps/v8/src/ia32/lithium-ia32.cc - Diff - CSE2410 Fall 2014 Bounce - CS Projects

Revision f230a1cf deps/v8/src/ia32/lithium-ia32.cc

+    }
     int LPlatformChunk::GetNextSpillIndex(bool is_double) {
     int LPlatformChunk::GetNextSpillIndex(RegisterKind kind) {
       // Skip a slot if for a double-width slot.
       if (is_double) {
       if (kind == DOUBLE_REGISTERS) {
         spill_slot_count_++;
         spill_slot_count_ |= 1;
         num_double_slots_++;
-...
+    }
     LOperand* LPlatformChunk::GetNextSpillSlot(bool is_double) {
       int index = GetNextSpillIndex(is_double);
       if (is_double) {
     LOperand* LPlatformChunk::GetNextSpillSlot(RegisterKind kind) {
       int index = GetNextSpillIndex(kind);
       if (kind == DOUBLE_REGISTERS) {
         return LDoubleStackSlot::Create(index, zone());
       } else {
         ASSERT(kind == GENERAL_REGISTERS);
         return LStackSlot::Create(index, zone());
+      }
+    }
-...
       // Reserve the first spill slot for the state of dynamic alignment.
       if (info()->IsOptimizing()) {
         int alignment_state_index = chunk_->GetNextSpillIndex(false);
         int alignment_state_index = chunk_->GetNextSpillIndex(GENERAL_REGISTERS);
         ASSERT_EQ(alignment_state_index, 0);
         USE(alignment_state_index);
+      }
-...
       // which will be subsumed into this frame.
       if (graph()->has_osr()) {
         for (int i = graph()->osr()->UnoptimizedFrameSlots(); i > 0; i--) {
           chunk_->GetNextSpillIndex(false);
           chunk_->GetNextSpillIndex(GENERAL_REGISTERS);
+        }
+      }
-...
+    }
     static inline bool CanBeImmediateConstant(HValue* value) {
       return value->IsConstant() && HConstant::cast(value)->NotInNewSpace();
+    }
     LOperand* LChunkBuilder::UseOrConstant(HValue* value) {
       return value->IsConstant()
       return CanBeImmediateConstant(value)
           ? chunk_->DefineConstantOperand(HConstant::cast(value))
           : Use(value);
+    }
     LOperand* LChunkBuilder::UseOrConstantAtStart(HValue* value) {
       return value->IsConstant()
       return CanBeImmediateConstant(value)
           ? chunk_->DefineConstantOperand(HConstant::cast(value))
           : UseAtStart(value);
+    }
     LOperand* LChunkBuilder::UseRegisterOrConstant(HValue* value) {
       return value->IsConstant()
       return CanBeImmediateConstant(value)
           ? chunk_->DefineConstantOperand(HConstant::cast(value))
           : UseRegister(value);
+    }
     LOperand* LChunkBuilder::UseRegisterOrConstantAtStart(HValue* value) {
       return value->IsConstant()
       return CanBeImmediateConstant(value)
           ? chunk_->DefineConstantOperand(HConstant::cast(value))
           : UseRegisterAtStart(value);
+    }
-...
     LInstruction* LChunkBuilder::AssignPointerMap(LInstruction* instr) {
       ASSERT(!instr->HasPointerMap());
       instr->set_pointer_map(new(zone()) LPointerMap(position_, zone()));
       instr->set_pointer_map(new(zone()) LPointerMap(zone()));
       return instr;
+    }
-...
     LInstruction* LChunkBuilder::DoShift(Token::Value op,
                                          HBitwiseBinaryOperation* instr) {
       if (instr->representation().IsTagged()) {
         ASSERT(instr->left()->representation().IsSmiOrTagged());
         ASSERT(instr->right()->representation().IsSmiOrTagged());
         LOperand* context = UseFixed(instr->context(), esi);
         LOperand* left = UseFixed(instr->left(), edx);
         LOperand* right = UseFixed(instr->right(), eax);
         LArithmeticT* result = new(zone()) LArithmeticT(op, context, left, right);
         return MarkAsCall(DefineFixed(result, eax), instr);
+      }
       ASSERT(instr->representation().IsSmiOrInteger32());
       ASSERT(instr->left()->representation().Equals(instr->representation()));
       ASSERT(instr->right()->representation().Equals(instr->representation()));
       LOperand* left = UseRegisterAtStart(instr->left());
       if (instr->representation().IsSmiOrInteger32()) {
         ASSERT(instr->left()->representation().Equals(instr->representation()));
         ASSERT(instr->right()->representation().Equals(instr->representation()));
         LOperand* left = UseRegisterAtStart(instr->left());
       HValue* right_value = instr->right();
       LOperand* right = NULL;
       int constant_value = 0;
       bool does_deopt = false;
       if (right_value->IsConstant()) {
         HConstant* constant = HConstant::cast(right_value);
         right = chunk_->DefineConstantOperand(constant);
         constant_value = constant->Integer32Value() & 0x1f;
         // Left shifts can deoptimize if we shift by > 0 and the result cannot be
         // truncated to smi.
         if (instr->representation().IsSmi() && constant_value > 0) {
           does_deopt = !instr->CheckUsesForFlag(HValue::kTruncatingToSmi);
         HValue* right_value = instr->right();
         LOperand* right = NULL;
         int constant_value = 0;
         bool does_deopt = false;
         if (right_value->IsConstant()) {
           HConstant* constant = HConstant::cast(right_value);
           right = chunk_->DefineConstantOperand(constant);
           constant_value = constant->Integer32Value() & 0x1f;
           // Left shifts can deoptimize if we shift by > 0 and the result cannot be
           // truncated to smi.
           if (instr->representation().IsSmi() && constant_value > 0) {
             does_deopt = !instr->CheckUsesForFlag(HValue::kTruncatingToSmi);
+          }
         } else {
           right = UseFixed(right_value, ecx);
+        }
       } else {
         right = UseFixed(right_value, ecx);
+      }
       // Shift operations can only deoptimize if we do a logical shift by 0 and
       // the result cannot be truncated to int32.
       if (op == Token::SHR && constant_value == 0) {
         if (FLAG_opt_safe_uint32_operations) {
           does_deopt = !instr->CheckFlag(HInstruction::kUint32);
         } else {
           does_deopt = !instr->CheckUsesForFlag(HValue::kTruncatingToInt32);
         // Shift operations can only deoptimize if we do a logical shift by 0 and
         // the result cannot be truncated to int32.
         if (op == Token::SHR && constant_value == 0) {
           if (FLAG_opt_safe_uint32_operations) {
             does_deopt = !instr->CheckFlag(HInstruction::kUint32);
           } else {
             does_deopt = !instr->CheckUsesForFlag(HValue::kTruncatingToInt32);
+          }
+        }
+      }
       LInstruction* result =
           DefineSameAsFirst(new(zone()) LShiftI(op, left, right, does_deopt));
       return does_deopt ? AssignEnvironment(result) : result;
         LInstruction* result =
             DefineSameAsFirst(new(zone()) LShiftI(op, left, right, does_deopt));
         return does_deopt ? AssignEnvironment(result) : result;
       } else {
         return DoArithmeticT(op, instr);
+      }
+    }
-...
       ASSERT(instr->representation().IsDouble());
       ASSERT(instr->left()->representation().IsDouble());
       ASSERT(instr->right()->representation().IsDouble());
       ASSERT(op != Token::MOD);
       LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
       LOperand* right = UseRegisterAtStart(instr->BetterRightOperand());
       LArithmeticD* result = new(zone()) LArithmeticD(op, left, right);
       return DefineSameAsFirst(result);
       if (op == Token::MOD) {
         LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
         LOperand* right = UseRegisterAtStart(instr->BetterRightOperand());
         LArithmeticD* result = new(zone()) LArithmeticD(op, left, right);
         return MarkAsCall(DefineSameAsFirst(result), instr);
       } else {
         LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
         LOperand* right = UseRegisterAtStart(instr->BetterRightOperand());
         LArithmeticD* result = new(zone()) LArithmeticD(op, left, right);
         return DefineSameAsFirst(result);
+      }
+    }
     LInstruction* LChunkBuilder::DoArithmeticT(Token::Value op,
                                                HArithmeticBinaryOperation* instr) {
       ASSERT(op == Token::ADD ||
              op == Token::DIV ||
              op == Token::MOD ||
              op == Token::MUL ||
              op == Token::SUB);
                                                HBinaryOperation* instr) {
       HValue* left = instr->left();
       HValue* right = instr->right();
       ASSERT(left->representation().IsTagged());
-...
     void LChunkBuilder::VisitInstruction(HInstruction* current) {
       HInstruction* old_current = current_instruction_;
       current_instruction_ = current;
       if (current->has_position()) position_ = current->position();
       LInstruction* instr = current->CompileToLithium(this);
       LInstruction* instr = NULL;
       if (current->CanReplaceWithDummyUses()) {
         HValue* first_operand = current->OperandCount() == 0
             ? graph()->GetConstant1()
             : current->OperandAt(0);
         instr = DefineAsRegister(new(zone()) LDummyUse(UseAny(first_operand)));
         for (int i = 1; i < current->OperandCount(); ++i) {
           LInstruction* dummy =
               new(zone()) LDummyUse(UseAny(current->OperandAt(i)));
           dummy->set_hydrogen_value(current);
           chunk_->AddInstruction(dummy, current_block_);
+        }
       } else {
         instr = current->CompileToLithium(this);
+      }
       argument_count_ += current->argument_delta();
       ASSERT(argument_count_ >= 0);
       if (instr != NULL) {
         // Associate the hydrogen instruction first, since we may need it for
         // the ClobbersRegisters() or ClobbersDoubleRegisters() calls below.
         instr->set_hydrogen_value(current);
     #if DEBUG
         // Make sure that the lithium instruction has either no fixed register
         // constraints in temps or the result OR no uses that are only used at
-...
+        }
     #endif
         instr->set_position(position_);
         if (FLAG_stress_pointer_maps && !instr->HasPointerMap()) {
           instr = AssignPointerMap(instr);
+        }
-...
           clobber->set_hydrogen_value(current);
           chunk_->AddInstruction(clobber, current_block_);
+        }
         instr->set_hydrogen_value(current);
         chunk_->AddInstruction(instr, current_block_);
+      }
       current_instruction_ = old_current;
-...
     LInstruction* LChunkBuilder::DoBranch(HBranch* instr) {
       HValue* value = instr->value();
       if (value->EmitAtUses()) {
         ASSERT(value->IsConstant());
         ASSERT(!value->representation().IsDouble());
         HBasicBlock* successor = HConstant::cast(value)->BooleanValue()
             ? instr->FirstSuccessor()
             : instr->SecondSuccessor();
         return new(zone()) LGoto(successor);
+      }
       LInstruction* goto_instr = CheckElideControlInstruction(instr);
       if (goto_instr != NULL) return goto_instr;
       ToBooleanStub::Types expected = instr->expected_input_types();
       // Tagged values that are not known smis or booleans require a
       // deoptimization environment. If the instruction is generic no
       // environment is needed since all cases are handled.
       HValue* value = instr->value();
       Representation rep = value->representation();
       HType type = value->type();
       if (!rep.IsTagged() || type.IsSmi() || type.IsBoolean()) {
-...
+    }
     LInstruction* LChunkBuilder::DoInstanceSize(HInstanceSize* instr) {
       LOperand* object = UseRegisterAtStart(instr->object());
       return DefineAsRegister(new(zone()) LInstanceSize(object));
+    }
     LInstruction* LChunkBuilder::DoWrapReceiver(HWrapReceiver* instr) {
       LOperand* receiver = UseRegister(instr->receiver());
       LOperand* function = UseRegisterAtStart(instr->function());
-...
     LInstruction* LChunkBuilder::DoPushArgument(HPushArgument* instr) {
       ++argument_count_;
       LOperand* argument = UseAny(instr->argument());
       return new(zone()) LPushArgument(argument);
+    }
-...
     LInstruction* LChunkBuilder::DoCallConstantFunction(
         HCallConstantFunction* instr) {
       argument_count_ -= instr->argument_count();
       return MarkAsCall(DefineFixed(new(zone()) LCallConstantFunction, eax), instr);
+    }
-...
     LInstruction* LChunkBuilder::DoInvokeFunction(HInvokeFunction* instr) {
       LOperand* context = UseFixed(instr->context(), esi);
       LOperand* function = UseFixed(instr->function(), edi);
       argument_count_ -= instr->argument_count();
       LInvokeFunction* result = new(zone()) LInvokeFunction(context, function);
       return MarkAsCall(DefineFixed(result, eax), instr, CANNOT_DEOPTIMIZE_EAGERLY);
+    }
-...
       ASSERT(instr->key()->representation().IsTagged());
       LOperand* context = UseFixed(instr->context(), esi);
       LOperand* key = UseFixed(instr->key(), ecx);
       argument_count_ -= instr->argument_count();
       LCallKeyed* result = new(zone()) LCallKeyed(context, key);
       return MarkAsCall(DefineFixed(result, eax), instr);
+    }
-...
     LInstruction* LChunkBuilder::DoCallNamed(HCallNamed* instr) {
       LOperand* context = UseFixed(instr->context(), esi);
       argument_count_ -= instr->argument_count();
       LCallNamed* result = new(zone()) LCallNamed(context);
       return MarkAsCall(DefineFixed(result, eax), instr);
+    }
-...
     LInstruction* LChunkBuilder::DoCallGlobal(HCallGlobal* instr) {
       LOperand* context = UseFixed(instr->context(), esi);
       argument_count_ -= instr->argument_count();
       LCallGlobal* result = new(zone()) LCallGlobal(context);
       return MarkAsCall(DefineFixed(result, eax), instr);
+    }
     LInstruction* LChunkBuilder::DoCallKnownGlobal(HCallKnownGlobal* instr) {
       argument_count_ -= instr->argument_count();
       return MarkAsCall(DefineFixed(new(zone()) LCallKnownGlobal, eax), instr);
+    }
-...
     LInstruction* LChunkBuilder::DoCallNew(HCallNew* instr) {
       LOperand* context = UseFixed(instr->context(), esi);
       LOperand* constructor = UseFixed(instr->constructor(), edi);
       argument_count_ -= instr->argument_count();
       LCallNew* result = new(zone()) LCallNew(context, constructor);
       return MarkAsCall(DefineFixed(result, eax), instr);
+    }
-...
     LInstruction* LChunkBuilder::DoCallNewArray(HCallNewArray* instr) {
       LOperand* context = UseFixed(instr->context(), esi);
       LOperand* constructor = UseFixed(instr->constructor(), edi);
       argument_count_ -= instr->argument_count();
       LCallNewArray* result = new(zone()) LCallNewArray(context, constructor);
       return MarkAsCall(DefineFixed(result, eax), instr);
+    }
-...
     LInstruction* LChunkBuilder::DoCallFunction(HCallFunction* instr) {
       LOperand* context = UseFixed(instr->context(), esi);
       LOperand* function = UseFixed(instr->function(), edi);
       argument_count_ -= instr->argument_count();
       LCallFunction* result = new(zone()) LCallFunction(context, function);
       return MarkAsCall(DefineFixed(result, eax), instr);
+    }
     LInstruction* LChunkBuilder::DoCallRuntime(HCallRuntime* instr) {
       argument_count_ -= instr->argument_count();
       LOperand* context = UseFixed(instr->context(), esi);
       return MarkAsCall(DefineFixed(new(zone()) LCallRuntime(context), eax), instr);
+    }
-...
       if (instr->representation().IsSmiOrInteger32()) {
         ASSERT(instr->left()->representation().Equals(instr->representation()));
         ASSERT(instr->right()->representation().Equals(instr->representation()));
         ASSERT(instr->CheckFlag(HValue::kTruncatingToInt32));
         LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
         LOperand* right = UseOrConstantAtStart(instr->BetterRightOperand());
         return DefineSameAsFirst(new(zone()) LBitI(left, right));
       } else {
         ASSERT(instr->representation().IsSmiOrTagged());
         ASSERT(instr->left()->representation().IsSmiOrTagged());
         ASSERT(instr->right()->representation().IsSmiOrTagged());
         LOperand* context = UseFixed(instr->context(), esi);
         LOperand* left = UseFixed(instr->left(), edx);
         LOperand* right = UseFixed(instr->right(), eax);
         LArithmeticT* result =
             new(zone()) LArithmeticT(instr->op(), context, left, right);
         return MarkAsCall(DefineFixed(result, eax), instr);
         return DoArithmeticT(instr->op(), instr);
+      }
+    }
     LInstruction* LChunkBuilder::DoDiv(HDiv* instr) {
       if (instr->representation().IsDouble()) {
         return DoArithmeticD(Token::DIV, instr);
       } else if (instr->representation().IsSmiOrInteger32()) {
       if (instr->representation().IsSmiOrInteger32()) {
         ASSERT(instr->left()->representation().Equals(instr->representation()));
         ASSERT(instr->right()->representation().Equals(instr->representation()));
         if (instr->HasPowerOf2Divisor()) {
-...
         LOperand* divisor = UseRegister(instr->right());
         LDivI* result = new(zone()) LDivI(dividend, divisor, temp);
         return AssignEnvironment(DefineFixed(result, eax));
       } else if (instr->representation().IsDouble()) {
         return DoArithmeticD(Token::DIV, instr);
       } else {
         ASSERT(instr->representation().IsTagged());
         return DoArithmeticT(Token::DIV, instr);
+      }
+    }
-...
               ? AssignEnvironment(result)
               : result;
+        }
       } else if (instr->representation().IsSmiOrTagged()) {
         return DoArithmeticT(Token::MOD, instr);
       } else if (instr->representation().IsDouble()) {
         return DoArithmeticD(Token::MOD, instr);
       } else {
         ASSERT(instr->representation().IsDouble());
         // We call a C function for double modulo. It can't trigger a GC. We need
         // to use fixed result register for the call.
         // TODO(fschneider): Allow any register as input registers.
         LArithmeticD* mod = new(zone()) LArithmeticD(Token::MOD,
                                                      UseFixedDouble(left, xmm2),
                                                      UseFixedDouble(right, xmm1));
         return MarkAsCall(DefineFixedDouble(mod, xmm1), instr);
         return DoArithmeticT(Token::MOD, instr);
+      }
+    }
-...
       } else if (instr->representation().IsDouble()) {
         return DoArithmeticD(Token::MUL, instr);
       } else {
         ASSERT(instr->representation().IsTagged());
         return DoArithmeticT(Token::MUL, instr);
+      }
+    }
-...
       } else if (instr->representation().IsDouble()) {
         return DoArithmeticD(Token::SUB, instr);
       } else {
         ASSERT(instr->representation().IsSmiOrTagged());
         return DoArithmeticT(Token::SUB, instr);
+      }
+    }
-...
       } else if (instr->representation().IsDouble()) {
         return DoArithmeticD(Token::ADD, instr);
       } else {
         ASSERT(instr->representation().IsSmiOrTagged());
         return DoArithmeticT(Token::ADD, instr);
+      }
+    }
-...
         ASSERT(instr->right()->representation().IsDouble());
         LOperand* left;
         LOperand* right;
         if (instr->left()->IsConstant() && instr->right()->IsConstant()) {
           left = UseRegisterOrConstantAtStart(instr->left());
           right = UseRegisterOrConstantAtStart(instr->right());
         if (CanBeImmediateConstant(instr->left()) &&
             CanBeImmediateConstant(instr->right())) {
           // The code generator requires either both inputs to be constant
           // operands, or neither.
           left = UseConstant(instr->left());
           right = UseConstant(instr->right());
         } else {
           left = UseRegisterAtStart(instr->left());
           right = UseRegisterAtStart(instr->right());
-...
     LInstruction* LChunkBuilder::DoCompareObjectEqAndBranch(
         HCompareObjectEqAndBranch* instr) {
       LInstruction* goto_instr = CheckElideControlInstruction(instr);
       if (goto_instr != NULL) return goto_instr;
       LOperand* left = UseRegisterAtStart(instr->left());
       LOperand* right = UseOrConstantAtStart(instr->right());
       return new(zone()) LCmpObjectEqAndBranch(left, right);
-...
     LInstruction* LChunkBuilder::DoCompareHoleAndBranch(
         HCompareHoleAndBranch* instr) {
       LOperand* object = UseRegisterAtStart(instr->object());
       return new(zone()) LCmpHoleAndBranch(object);
       LOperand* value = UseRegisterAtStart(instr->value());
       return new(zone()) LCmpHoleAndBranch(value);
+    }
-...
+    }
     LInstruction* LChunkBuilder::DoAbnormalExit(HAbnormalExit* instr) {
       // The control instruction marking the end of a block that completed
       // abruptly (e.g., threw an exception).  There is nothing specific to do.
       return NULL;
+    }
     LInstruction* LChunkBuilder::DoThrow(HThrow* instr) {
       LOperand* context = UseFixed(instr->context(), esi);
       LOperand* value = UseFixed(instr->value(), eax);
-...
       // building a stack frame.
       if (from.IsTagged()) {
         if (to.IsDouble()) {
           info()->MarkAsDeferredCalling();
           LOperand* value = UseRegister(instr->value());
           // Temp register only necessary for minus zero check.
           LOperand* temp = TempRegister();
-...
         } else if (to.IsSmi()) {
           HValue* val = instr->value();
           LOperand* value = UseRegister(val);
           LInstruction* result =
               DefineSameAsFirst(new(zone()) LInteger32ToSmi(value));
           LInstruction* result = val->CheckFlag(HInstruction::kUint32)
                ? DefineSameAsFirst(new(zone()) LUint32ToSmi(value))
                : DefineSameAsFirst(new(zone()) LInteger32ToSmi(value));
           if (val->HasRange() && val->range()->IsInSmiRange()) {
             return result;
+          }
-...
+    }
     LInstruction* LChunkBuilder::DoIsNumberAndBranch(HIsNumberAndBranch* instr) {
       return new(zone())
         LIsNumberAndBranch(UseRegisterOrConstantAtStart(instr->value()));
+    }
     LInstruction* LChunkBuilder::DoCheckInstanceType(HCheckInstanceType* instr) {
       LOperand* value = UseRegisterAtStart(instr->value());
       LOperand* temp = TempRegister();
-...
+    }
     LInstruction* LChunkBuilder::DoLoadRoot(HLoadRoot* instr) {
       return DefineAsRegister(new(zone()) LLoadRoot);
+    }
     LInstruction* LChunkBuilder::DoLoadExternalArrayPointer(
         HLoadExternalArrayPointer* instr) {
       LOperand* input = UseRegisterAtStart(instr->value());
-...
           !(FLAG_track_double_fields && instr->field_representation().IsDouble());
       LOperand* val;
       if (needs_write_barrier) {
       if (instr->field_representation().IsByte()) {
         // mov_b requires a byte register (i.e. any of eax, ebx, ecx, edx).
         // Just force the value to be in eax and we're safe here.
         val = UseFixed(instr->value(), eax);
       } else if (needs_write_barrier) {
         val = UseTempRegister(instr->value());
       } else if (can_be_constant) {
         val = UseRegisterOrConstant(instr->value());
-...
     LInstruction* LChunkBuilder::DoCallStub(HCallStub* instr) {
       LOperand* context = UseFixed(instr->context(), esi);
       argument_count_ -= instr->argument_count();
       LCallStub* result = new(zone()) LCallStub(context);
       return MarkAsCall(DefineFixed(result, eax), instr);
+    }
-...
       if (env->entry()->arguments_pushed()) {
         int argument_count = env->arguments_environment()->parameter_count();
         pop = new(zone()) LDrop(argument_count);
         argument_count_ -= argument_count;
         ASSERT(instr->argument_delta() == -argument_count);
+      }
       HEnvironment* outer = current_block_->last_environment()->

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