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test/cctest/compiler/codegen-tester.h

+// Copyright 2014 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.
+
+#ifndef V8_CCTEST_COMPILER_CODEGEN_TESTER_H_
+#define V8_CCTEST_COMPILER_CODEGEN_TESTER_H_
+
+#include "src/v8.h"
+
+#include "src/compiler/pipeline.h"
+#include "src/compiler/raw-machine-assembler.h"
+#include "src/compiler/structured-machine-assembler.h"
+#include "src/simulator.h"
+#include "test/cctest/compiler/call-tester.h"
+
+namespace v8 {
+namespace internal {
+namespace compiler {
+
+template <typename MachineAssembler>
+class MachineAssemblerTester : public HandleAndZoneScope,
+                               public CallHelper,
+                               public MachineAssembler {
+ public:
+  MachineAssemblerTester(MachineRepresentation return_type,
+                         MachineRepresentation p0, MachineRepresentation p1,
+                         MachineRepresentation p2, MachineRepresentation p3,
+                         MachineRepresentation p4)
+      : HandleAndZoneScope(),
+        CallHelper(main_isolate()),
+        MachineAssembler(new (main_zone()) Graph(main_zone()),
+                         ToCallDescriptorBuilder(main_zone(), return_type, p0,
+                                                 p1, p2, p3, p4),
+                         MachineOperatorBuilder::pointer_rep()) {}
+
+  Node* LoadFromPointer(void* address,
+                        MachineRepresentation rep,
+                        int32_t offset = 0) {
+    return this->Load(rep,
+                      this->PointerConstant(address),
+                      this->Int32Constant(offset));
+  }
+
+  void StoreToPointer(void* address,
+                      MachineRepresentation rep,
+                      Node* node) {
+    this->Store(rep,
+                this->PointerConstant(address),
+                node);
+  }
+
+  Node* StringConstant(const char* string) {
+    return this->HeapConstant(
+        this->isolate()->factory()->InternalizeUtf8String(string));
+  }
+
+  void CheckNumber(double expected, Object* number) {
+    CHECK(this->isolate()->factory()->NewNumber(expected)->SameValue(number));
+  }
+
+  void CheckString(const char* expected, Object* string) {
+    CHECK(this->isolate()->factory()->InternalizeUtf8String(expected)->
+          SameValue(string));
+  }
+
+  void GenerateCode() { Generate(); }
+
+ protected:
+  virtual void VerifyParameters(int parameter_count,
+                                MachineRepresentation* parameter_types) {
+    CHECK_EQ(this->parameter_count(), parameter_count);
+    const MachineRepresentation* expected_types = this->parameter_types();
+    for (int i = 0; i < parameter_count; i++) {
+      CHECK_EQ(expected_types[i], parameter_types[i]);
+    }
+  }
+
+  virtual byte* Generate() {
+    if (code_.is_null()) {
+      Schedule* schedule = this->Export();
+      CallDescriptor* call_descriptor = this->call_descriptor();
+      Graph* graph = this->graph();
+      CompilationInfo info(graph->zone()->isolate(), graph->zone());
+      Linkage linkage(&info, call_descriptor);
+      Pipeline pipeline(&info);
+      code_ = pipeline.GenerateCodeForMachineGraph(&linkage, graph, schedule);
+    }
+    return this->code_.ToHandleChecked()->entry();
+  }
+
+ private:
+  MaybeHandle<Code> code_;
+};
+
+
+template <typename ReturnType>
+class RawMachineAssemblerTester
+    : public MachineAssemblerTester<RawMachineAssembler>,
+      public CallHelper2<ReturnType, RawMachineAssemblerTester<ReturnType> > {
+ public:
+  RawMachineAssemblerTester(MachineRepresentation p0 = kMachineLast,
+                            MachineRepresentation p1 = kMachineLast,
+                            MachineRepresentation p2 = kMachineLast,
+                            MachineRepresentation p3 = kMachineLast,
+                            MachineRepresentation p4 = kMachineLast)
+      : MachineAssemblerTester(ReturnValueTraits<ReturnType>::Representation(),
+                               p0, p1, p2, p3, p4) {}
+};
+
+
+template <typename ReturnType>
+class StructuredMachineAssemblerTester
+    : public MachineAssemblerTester<StructuredMachineAssembler>,
+      public CallHelper2<ReturnType,
+                         StructuredMachineAssemblerTester<ReturnType> > {
+ public:
+  StructuredMachineAssemblerTester(MachineRepresentation p0 = kMachineLast,
+                                   MachineRepresentation p1 = kMachineLast,
+                                   MachineRepresentation p2 = kMachineLast,
+                                   MachineRepresentation p3 = kMachineLast,
+                                   MachineRepresentation p4 = kMachineLast)
+      : MachineAssemblerTester(ReturnValueTraits<ReturnType>::Representation(),
+                               p0, p1, p2, p3, p4) {}
+};
+
+
+static const bool USE_RESULT_BUFFER = true;
+static const bool USE_RETURN_REGISTER = false;
+
+// TODO(titzer): use the C-style calling convention, or any register-based
+// calling convention for binop tests.
+template <typename CType, MachineRepresentation rep, bool use_result_buffer>
+class BinopTester {
+ public:
+  static const int32_t CHECK_VALUE = 0x99BEEDCE;
+
+  explicit BinopTester(RawMachineAssemblerTester<int32_t>* tester)
+      : T(tester),
+        param0(T->LoadFromPointer(&p0, rep)),
+        param1(T->LoadFromPointer(&p1, rep)),
+        p0(static_cast<CType>(0)),
+        p1(static_cast<CType>(0)),
+        result(static_cast<CType>(0)) {}
+
+  RawMachineAssemblerTester<int32_t>* T;
+  Node* param0;
+  Node* param1;
+
+  CType call(CType a0, CType a1) {
+    p0 = a0;
+    p1 = a1;
+    if (use_result_buffer) {
+      CHECK_EQ(CHECK_VALUE, T->Call());
+      return result;
+    } else {
+      return T->Call();
+    }
+  }
+
+  void AddReturn(Node* val) {
+    if (use_result_buffer) {
+      T->Store(rep, T->PointerConstant(&result), T->Int32Constant(0), val);
+      T->Return(T->Int32Constant(CHECK_VALUE));
+    } else {
+      T->Return(val);
+    }
+  }
+
+ protected:
+  CType p0;
+  CType p1;
+  CType result;
+};
+
+
+// A helper class for testing code sequences that take two int parameters and
+// return an int value.
+class Int32BinopTester : public
+    BinopTester<int32_t, kMachineWord32, USE_RETURN_REGISTER> {
+ public:
+  explicit Int32BinopTester(RawMachineAssemblerTester<int32_t>* tester)
+      : BinopTester<int32_t, kMachineWord32, USE_RETURN_REGISTER>(tester) {}
+
+  int32_t call(uint32_t a0, uint32_t a1) {
+    p0 = static_cast<int32_t>(a0);
+    p1 = static_cast<int32_t>(a1);
+    return T->Call();
+  }
+};
+
+
+// A helper class for testing code sequences that take two double parameters and
+// return a double value.
+// TODO(titzer): figure out how to return doubles correctly on ia32.
+class Float64BinopTester : public
+    BinopTester<double, kMachineFloat64, USE_RESULT_BUFFER> {
+ public:
+  explicit Float64BinopTester(RawMachineAssemblerTester<int32_t>* tester)
+      : BinopTester<double, kMachineFloat64, USE_RESULT_BUFFER>(tester) {}
+};
+
+
+// A helper class for testing code sequences that take two pointer parameters
+// and return a pointer value.
+// TODO(titzer): pick word size of pointers based on V8_TARGET.
+template <typename Type>
+class PointerBinopTester : public
+    BinopTester<Type*, kMachineWord32, USE_RETURN_REGISTER> {
+ public:
+  explicit PointerBinopTester(RawMachineAssemblerTester<int32_t>* tester)
+      : BinopTester<Type*, kMachineWord32, USE_RETURN_REGISTER>(tester) {}
+};
+
+
+// A helper class for testing code sequences that take two tagged parameters and
+// return a tagged value.
+template <typename Type>
+class TaggedBinopTester : public
+    BinopTester<Type*, kMachineTagged, USE_RETURN_REGISTER> {
+ public:
+  explicit TaggedBinopTester(RawMachineAssemblerTester<int32_t>* tester)
+      : BinopTester<Type*, kMachineTagged, USE_RETURN_REGISTER>(tester) {}
+};
+
+// A helper class for testing compares. Wraps a machine opcode and provides
+// evaluation routines and the operators.
+class CompareWrapper {
+ public:
+  explicit CompareWrapper(IrOpcode::Value op) : opcode(op) {}
+
+  Node* MakeNode(RawMachineAssemblerTester<int32_t>* m, Node* a, Node* b) {
+    return m->NewNode(op(m->machine()), a, b);
+  }
+
+  Operator* op(MachineOperatorBuilder* machine) {
+    switch (opcode) {
+      case IrOpcode::kWord32Equal:
+        return machine->Word32Equal();
+      case IrOpcode::kInt32LessThan:
+        return machine->Int32LessThan();
+      case IrOpcode::kInt32LessThanOrEqual:
+        return machine->Int32LessThanOrEqual();
+      case IrOpcode::kUint32LessThan:
+        return machine->Uint32LessThan();
+      case IrOpcode::kUint32LessThanOrEqual:
+        return machine->Uint32LessThanOrEqual();
+      case IrOpcode::kFloat64Equal:
+        return machine->Float64Equal();
+      case IrOpcode::kFloat64LessThan:
+        return machine->Float64LessThan();
+      case IrOpcode::kFloat64LessThanOrEqual:
+        return machine->Float64LessThanOrEqual();
+      default: UNREACHABLE();
+    }
+    return NULL;
+  }
+
+  bool Int32Compare(int32_t a, int32_t b) {
+    switch (opcode) {
+      case IrOpcode::kWord32Equal: return a == b;
+      case IrOpcode::kInt32LessThan: return a < b;
+      case IrOpcode::kInt32LessThanOrEqual: return a <= b;
+      case IrOpcode::kUint32LessThan:
+        return static_cast<uint32_t>(a) < static_cast<uint32_t>(b);
+      case IrOpcode::kUint32LessThanOrEqual:
+        return static_cast<uint32_t>(a) <= static_cast<uint32_t>(b);
+      default: UNREACHABLE();
+    }
+    return false;
+  }
+
+  bool Float64Compare(double a, double b) {
+    switch (opcode) {
+      case IrOpcode::kFloat64Equal: return a == b;
+      case IrOpcode::kFloat64LessThan: return a < b;
+      case IrOpcode::kFloat64LessThanOrEqual: return a <= b;
+      default: UNREACHABLE();
+    }
+    return false;
+  }
+
+  IrOpcode::Value opcode;
+};
+
+
+// A small closure class to generate code for a function of two inputs that
+// produces a single output so that it can be used in many different contexts.
+// The {expected()} method should compute the expected output for a given
+// pair of inputs.
+template <typename T>
+class BinopGen {
+ public:
+  virtual void gen(RawMachineAssemblerTester<int32_t>* m, Node* a, Node* b) = 0;
+  virtual T expected(T a, T b) = 0;
+  virtual ~BinopGen() { }
+};
+
+// A helper class to generate various combination of input shape combinations
+// and run the generated code to ensure it produces the correct results.
+class Int32BinopInputShapeTester {
+ public:
+  explicit Int32BinopInputShapeTester(BinopGen<int32_t>* g) : gen(g) { }
+
+  void TestAllInputShapes();
+
+ private:
+  BinopGen<int32_t>* gen;
+  int32_t input_a;
+  int32_t input_b;
+
+  void Run(RawMachineAssemblerTester<int32_t>* m);
+  void RunLeft(RawMachineAssemblerTester<int32_t>* m);
+  void RunRight(RawMachineAssemblerTester<int32_t>* m);
+};
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_CCTEST_COMPILER_CODEGEN_TESTER_H_