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      1 // Copyright 2014 the V8 project authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "src/compiler/operator-properties.h"
      6 
      7 #include "src/compiler/js-operator.h"
      8 #include "src/compiler/linkage.h"
      9 #include "src/compiler/opcodes.h"
     10 
     11 namespace v8 {
     12 namespace internal {
     13 namespace compiler {
     14 
     15 // static
     16 bool OperatorProperties::HasContextInput(const Operator* op) {
     17   IrOpcode::Value opcode = static_cast<IrOpcode::Value>(op->opcode());
     18   return IrOpcode::IsJsOpcode(opcode);
     19 }
     20 
     21 
     22 // static
     23 bool OperatorProperties::HasFrameStateInput(const Operator* op) {
     24   switch (op->opcode()) {
     25     case IrOpcode::kCheckpoint:
     26     case IrOpcode::kFrameState:
     27       return true;
     28     case IrOpcode::kJSCallRuntime: {
     29       const CallRuntimeParameters& p = CallRuntimeParametersOf(op);
     30       return Linkage::NeedsFrameStateInput(p.id());
     31     }
     32 
     33     // Strict equality cannot lazily deoptimize.
     34     case IrOpcode::kJSStrictEqual:
     35     case IrOpcode::kJSStrictNotEqual:
     36       return false;
     37 
     38     // Binary operations
     39     case IrOpcode::kJSAdd:
     40     case IrOpcode::kJSSubtract:
     41     case IrOpcode::kJSMultiply:
     42     case IrOpcode::kJSDivide:
     43     case IrOpcode::kJSModulus:
     44 
     45     // Bitwise operations
     46     case IrOpcode::kJSBitwiseOr:
     47     case IrOpcode::kJSBitwiseXor:
     48     case IrOpcode::kJSBitwiseAnd:
     49 
     50     // Shift operations
     51     case IrOpcode::kJSShiftLeft:
     52     case IrOpcode::kJSShiftRight:
     53     case IrOpcode::kJSShiftRightLogical:
     54 
     55     // Compare operations
     56     case IrOpcode::kJSEqual:
     57     case IrOpcode::kJSNotEqual:
     58     case IrOpcode::kJSGreaterThan:
     59     case IrOpcode::kJSGreaterThanOrEqual:
     60     case IrOpcode::kJSLessThan:
     61     case IrOpcode::kJSLessThanOrEqual:
     62     case IrOpcode::kJSHasProperty:
     63     case IrOpcode::kJSInstanceOf:
     64     case IrOpcode::kJSOrdinaryHasInstance:
     65 
     66     // Object operations
     67     case IrOpcode::kJSCreate:
     68     case IrOpcode::kJSCreateArguments:
     69     case IrOpcode::kJSCreateArray:
     70     case IrOpcode::kJSCreateLiteralArray:
     71     case IrOpcode::kJSCreateLiteralObject:
     72     case IrOpcode::kJSCreateLiteralRegExp:
     73 
     74     // Property access operations
     75     case IrOpcode::kJSLoadNamed:
     76     case IrOpcode::kJSStoreNamed:
     77     case IrOpcode::kJSLoadProperty:
     78     case IrOpcode::kJSStoreProperty:
     79     case IrOpcode::kJSLoadGlobal:
     80     case IrOpcode::kJSStoreGlobal:
     81     case IrOpcode::kJSStoreNamedOwn:
     82     case IrOpcode::kJSStoreDataPropertyInLiteral:
     83     case IrOpcode::kJSDeleteProperty:
     84 
     85     // Context operations
     86     case IrOpcode::kJSCreateScriptContext:
     87 
     88     // Conversions
     89     case IrOpcode::kJSToInteger:
     90     case IrOpcode::kJSToLength:
     91     case IrOpcode::kJSToName:
     92     case IrOpcode::kJSToNumber:
     93     case IrOpcode::kJSToObject:
     94     case IrOpcode::kJSToString:
     95 
     96     // Call operations
     97     case IrOpcode::kJSConstruct:
     98     case IrOpcode::kJSConstructWithSpread:
     99     case IrOpcode::kJSCallForwardVarargs:
    100     case IrOpcode::kJSCall:
    101     case IrOpcode::kJSCallWithSpread:
    102 
    103     // Misc operations
    104     case IrOpcode::kJSForInNext:
    105     case IrOpcode::kJSForInPrepare:
    106     case IrOpcode::kJSStackCheck:
    107     case IrOpcode::kJSDebugger:
    108     case IrOpcode::kJSGetSuperConstructor:
    109       return true;
    110 
    111     default:
    112       return false;
    113   }
    114 }
    115 
    116 
    117 // static
    118 int OperatorProperties::GetTotalInputCount(const Operator* op) {
    119   return op->ValueInputCount() + GetContextInputCount(op) +
    120          GetFrameStateInputCount(op) + op->EffectInputCount() +
    121          op->ControlInputCount();
    122 }
    123 
    124 
    125 // static
    126 bool OperatorProperties::IsBasicBlockBegin(const Operator* op) {
    127   Operator::Opcode const opcode = op->opcode();
    128   return opcode == IrOpcode::kStart || opcode == IrOpcode::kEnd ||
    129          opcode == IrOpcode::kDead || opcode == IrOpcode::kLoop ||
    130          opcode == IrOpcode::kMerge || opcode == IrOpcode::kIfTrue ||
    131          opcode == IrOpcode::kIfFalse || opcode == IrOpcode::kIfSuccess ||
    132          opcode == IrOpcode::kIfException || opcode == IrOpcode::kIfValue ||
    133          opcode == IrOpcode::kIfDefault;
    134 }
    135 
    136 }  // namespace compiler
    137 }  // namespace internal
    138 }  // namespace v8
    139