[wasm] Unittest for Int64Lowering.

test/unittests/compiler/int64-lowering-unittest.cc

+// Copyright 2016 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/compiler/int64-lowering.h"
+#include "src/compiler/common-operator.h"
+#include "src/compiler/linkage.h"
+#include "src/compiler/machine-operator.h"
+#include "src/compiler/node.h"
+
+#include "src/compiler/node-properties.h"
+
+#include "src/signature.h"
+
+#include "src/wasm/wasm-module.h"
+
+#include "test/unittests/compiler/graph-unittest.h"
+#include "test/unittests/compiler/node-test-utils.h"
+
+namespace v8 {
+namespace internal {
+namespace compiler {
+
+class Int64LoweringTest : public GraphTest {
+ public:
+  Int64LoweringTest() : GraphTest(), machine_(zone()) {
+    value_[0] = 0x1234567890abcdef;
+    value_[1] = 0x1edcba098765432f;
+    value_[2] = 0x1133557799886644;
+  }
+
+  MachineOperatorBuilder* machine() { return &machine_; }
+
+  void LowerGraph(Node* node, Signature<MachineRepresentation>* signature) {
+    Node* ret = graph()->NewNode(common()->Return(), node, graph()->start(),
+                                 graph()->start());
+    NodeProperties::MergeControlToEnd(graph(), common(), ret);
+
+    Int64Lowering lowering(graph(), machine(), common(), zone(), signature);
+    lowering.LowerGraph();
+  }
+
+  void LowerGraph(Node* node, MachineRepresentation return_type,
+                  MachineRepresentation rep = MachineRepresentation::kWord32,
+                  int num_params = 0) {
+    Signature<MachineRepresentation>::Builder sig_builder(zone(), 1,
+                                                          num_params);
+    sig_builder.AddReturn(return_type);
+    for (int i = 0; i < num_params; i++) {
+      sig_builder.AddParam(rep);
+    }
+    LowerGraph(node, sig_builder.Build());
+  }
+
+  void CompareCallDescriptors(const CallDescriptor* lhs,
+                              const CallDescriptor* rhs) {
+    EXPECT_THAT(lhs->CalleeSavedFPRegisters(), rhs->CalleeSavedFPRegisters());
+    EXPECT_THAT(lhs->CalleeSavedRegisters(), rhs->CalleeSavedRegisters());
+    EXPECT_THAT(lhs->FrameStateCount(), rhs->FrameStateCount());
+    EXPECT_THAT(lhs->InputCount(), rhs->InputCount());
+    for (size_t i = 0; i < lhs->InputCount(); i++) {
+      EXPECT_THAT(lhs->GetInputLocation(i), rhs->GetInputLocation(i));
+      EXPECT_THAT(lhs->GetInputType(i), rhs->GetInputType(i));
+    }
+    EXPECT_THAT(lhs->ReturnCount(), rhs->ReturnCount());
+    for (size_t i = 0; i < lhs->ReturnCount(); i++) {
+      EXPECT_THAT(lhs->GetReturnLocation(i), rhs->GetReturnLocation(i));
+      EXPECT_THAT(lhs->GetReturnType(i), rhs->GetReturnType(i));
+    }
+    EXPECT_THAT(lhs->flags(), rhs->flags());
+    EXPECT_THAT(lhs->kind(), rhs->kind());
+  }
+
+  int64_t value(int i) { return value_[i]; }
+
+  int32_t low_word_value(int i) {
+    return static_cast<int32_t>(value_[i] & 0xffffffff);
+  }
+
+  int32_t high_word_value(int i) {
+    return static_cast<int32_t>(value_[i] >> 32);
+  }
+
+ private:
+  MachineOperatorBuilder machine_;
+  int64_t value_[3];
+};
+
+TEST_F(Int64LoweringTest, Int64Constant) {
+  if (4 != kPointerSize) return;
+
+  LowerGraph(Int64Constant(value(0)), MachineRepresentation::kWord64);
+  EXPECT_THAT(graph()->end()->InputAt(1),
+              IsReturn2(IsInt32Constant(low_word_value(0)),
+                        IsInt32Constant(high_word_value(0)), start(), start()));
+}
+
+TEST_F(Int64LoweringTest, Int64Load) {
+  if (4 != kPointerSize) return;
+
+  int32_t base = 0x1234;
+  int32_t index = 0x5678;
+
+  LowerGraph(graph()->NewNode(machine()->Load(MachineType::Int64()),
+                              Int32Constant(base), Int32Constant(index),
+                              start(), start()),
+             MachineRepresentation::kWord64);
+
+  Matcher<Node*> high_word_load_matcher =
+      IsLoad(MachineType::Int32(), IsInt32Constant(base),
+             IsInt32Add(IsInt32Constant(index), IsInt32Constant(0x4)), start(),
+             start());
+
+  EXPECT_THAT(
+      graph()->end()->InputAt(1),
+      IsReturn2(IsLoad(MachineType::Int32(), IsInt32Constant(base),
+                       IsInt32Constant(index), high_word_load_matcher, start()),
+                high_word_load_matcher, start(), start()));
+}
+
+TEST_F(Int64LoweringTest, Int64Store) {
+  if (4 != kPointerSize) return;
+
+  // We have to build the TF graph explicitly here because Store does not return
+  // a value.
+
+  int32_t base = 1111;
+  int32_t index = 2222;
+  int32_t return_value = 0x5555;
+
+  Signature<MachineRepresentation>::Builder sig_builder(zone(), 1, 0);
+  sig_builder.AddReturn(MachineRepresentation::kWord32);
+
+  Node* store = graph()->NewNode(
+      machine()->Store(StoreRepresentation(MachineRepresentation::kWord64,
+                                           WriteBarrierKind::kNoWriteBarrier)),
+      Int32Constant(base), Int32Constant(index), Int64Constant(value(0)),
+      start(), start());
+
+  Node* ret = graph()->NewNode(common()->Return(), Int32Constant(return_value),
+                               store, start());
+
+  NodeProperties::MergeControlToEnd(graph(), common(), ret);
+
+  Int64Lowering lowering(graph(), machine(), common(), zone(),
+                         sig_builder.Build());
+  lowering.LowerGraph();
+
+  const StoreRepresentation rep(MachineRepresentation::kWord32,
+                                kNoWriteBarrier);
+
+  EXPECT_THAT(
+      graph()->end()->InputAt(1),
+      IsReturn(
+          IsInt32Constant(return_value),
+          IsStore(
+              rep, IsInt32Constant(base), IsInt32Constant(index),
+              IsInt32Constant(low_word_value(0)),
+              IsStore(rep, IsInt32Constant(base),
+                      IsInt32Add(IsInt32Constant(index), IsInt32Constant(4)),
+                      IsInt32Constant(high_word_value(0)), start(), start()),
+              start()),
+          start()));
+}
+
+TEST_F(Int64LoweringTest, Int64And) {
+  if (4 != kPointerSize) return;
+
+  LowerGraph(graph()->NewNode(machine()->Word64And(), Int64Constant(value(0)),
+                              Int64Constant(value(1))),
+             MachineRepresentation::kWord64);
+  EXPECT_THAT(graph()->end()->InputAt(1),
+              IsReturn2(IsWord32And(IsInt32Constant(low_word_value(0)),
+                                    IsInt32Constant(low_word_value(1))),
+                        IsWord32And(IsInt32Constant(high_word_value(0)),
+                                    IsInt32Constant(high_word_value(1))),
+                        start(), start()));
+}
+
+TEST_F(Int64LoweringTest, TruncateInt64ToInt32) {
+  if (4 != kPointerSize) return;
+
+  LowerGraph(graph()->NewNode(machine()->TruncateInt64ToInt32(),
+                              Int64Constant(value(0))),
+             MachineRepresentation::kWord32);
+  EXPECT_THAT(graph()->end()->InputAt(1),
+              IsReturn(IsInt32Constant(low_word_value(0)), start(), start()));
+}
+
+TEST_F(Int64LoweringTest, Parameter) {
+  if (4 != kPointerSize) return;
+
+  LowerGraph(Parameter(0), MachineRepresentation::kWord64,
+             MachineRepresentation::kWord64, 1);
+
+  EXPECT_THAT(graph()->end()->InputAt(1),
+              IsReturn2(IsParameter(0), IsParameter(1), start(), start()));
+}
+
+TEST_F(Int64LoweringTest, Parameter2) {
+  if (4 != kPointerSize) return;
+
+  Signature<MachineRepresentation>::Builder sig_builder(zone(), 1, 5);
+  sig_builder.AddReturn(MachineRepresentation::kWord32);
+
+  sig_builder.AddParam(MachineRepresentation::kWord32);
+  sig_builder.AddParam(MachineRepresentation::kWord64);
+  sig_builder.AddParam(MachineRepresentation::kFloat64);
+  sig_builder.AddParam(MachineRepresentation::kWord64);
+  sig_builder.AddParam(MachineRepresentation::kWord32);
+
+  int start_parameter = start()->op()->ValueOutputCount();
+  LowerGraph(Parameter(4), sig_builder.Build());
+
+  EXPECT_THAT(graph()->end()->InputAt(1),
+              IsReturn(IsParameter(6), start(), start()));
+  // The parameter of the start node should increase by 2, because we lowered
+  // two parameter nodes.
+  EXPECT_THAT(start()->op()->ValueOutputCount(), start_parameter + 2);
+}
+
+TEST_F(Int64LoweringTest, CallI64Return) {
+  if (4 != kPointerSize) return;
+
+  int32_t function = 0x9999;
+
+  Signature<MachineRepresentation>::Builder sig_builder(zone(), 1, 0);
+  sig_builder.AddReturn(MachineRepresentation::kWord64);
+
+  compiler::CallDescriptor* desc =
+      wasm::ModuleEnv::GetWasmCallDescriptor(zone(), sig_builder.Build());
+
+  LowerGraph(graph()->NewNode(common()->Call(desc), Int32Constant(function),
+                              start(), start()),
+             MachineRepresentation::kWord64);
+
+  Matcher<Node*> call_matcher =
+      IsCall(testing::_, IsInt32Constant(function), start(), start());
+
+  EXPECT_THAT(graph()->end()->InputAt(1),
+              IsReturn2(IsProjection(0, call_matcher),

[Michael Starzinger, 2016/02/23 14:24:03]

If you wanted to make sure that both projections actually project out of the
"same" call node, you could use the capture mechanism. Just grep for
"testing::Capture" in the unittests directory to see some examples of how this
can be used. Just a suggestion, it's up to you.

[ahaas, 2016/02/23 14:48:56]

Done.

+                        IsProjection(1, call_matcher), start(), start()));
+
+  CompareCallDescriptors(
+      OpParameter<const CallDescriptor*>(
+          graph()->end()->InputAt(1)->InputAt(0)->InputAt(0)),
+      wasm::ModuleEnv::GetI32WasmCallDescriptor(zone(), desc));
+}
+
+TEST_F(Int64LoweringTest, CallI64Parameter) {
+  if (4 != kPointerSize) return;
+
+  int32_t function = 0x9999;
+
+  Signature<MachineRepresentation>::Builder sig_builder(zone(), 1, 3);
+  sig_builder.AddReturn(MachineRepresentation::kWord32);
+  sig_builder.AddParam(MachineRepresentation::kWord64);
+  sig_builder.AddParam(MachineRepresentation::kWord32);
+  sig_builder.AddParam(MachineRepresentation::kWord64);
+
+  compiler::CallDescriptor* desc =
+      wasm::ModuleEnv::GetWasmCallDescriptor(zone(), sig_builder.Build());
+
+  LowerGraph(graph()->NewNode(common()->Call(desc), Int32Constant(function),
+                              Int64Constant(value(0)),
+                              Int32Constant(low_word_value(1)),
+                              Int64Constant(value(2)), start(), start()),
+             MachineRepresentation::kWord32);
+
+  EXPECT_THAT(
+      graph()->end()->InputAt(1),
+      IsReturn(IsCall(testing::_, IsInt32Constant(function),
+                      IsInt32Constant(low_word_value(0)),
+                      IsInt32Constant(high_word_value(0)),
+                      IsInt32Constant(low_word_value(1)),
+                      IsInt32Constant(low_word_value(2)),
+                      IsInt32Constant(high_word_value(2)), start(), start()),
+               start(), start()));
+
+  CompareCallDescriptors(
+      OpParameter<const CallDescriptor*>(
+          graph()->end()->InputAt(1)->InputAt(0)),
+      wasm::ModuleEnv::GetI32WasmCallDescriptor(zone(), desc));
+}
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8