[turbofan] Initial import of SimplifiedOperatorReducer.

test/compiler-unittests/simplified-operator-reducer-unittest.cc

+// 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.
+
+#include "src/compiler/js-graph.h"
+#include "src/compiler/simplified-operator.h"
+#include "src/compiler/simplified-operator-reducer.h"
+#include "src/compiler/typer.h"
+#include "src/conversions.h"
+#include "test/compiler-unittests/graph-unittest.h"
+
+namespace v8 {
+namespace internal {
+namespace compiler {
+
+class SimplifiedOperatorReducerTest : public GraphTest {
+ public:
+  explicit SimplifiedOperatorReducerTest(int num_parameters = 1)
+      : GraphTest(num_parameters), simplified_(zone()) {}
+  virtual ~SimplifiedOperatorReducerTest() {}
+
+ protected:
+  Reduction Reduce(Node* node) {
+    Typer typer(zone());
+    MachineOperatorBuilder machine(zone());
+    JSGraph jsgraph(graph(), common(), &typer);
+    SimplifiedOperatorReducer reducer(&jsgraph, &machine);
+    return reducer.Reduce(node);
+  }
+
+  SimplifiedOperatorBuilder* simplified() { return &simplified_; }
+
+ private:
+  SimplifiedOperatorBuilder simplified_;
+};
+
+
+namespace {
+
+static const double kFloat64Values[] = {
+    -V8_INFINITY,  -6.52696e+290, -1.05768e+290, -5.34203e+268, -1.01997e+268,
+    -8.22758e+266, -1.58402e+261, -5.15246e+241, -5.92107e+226, -1.21477e+226,
+    -1.67913e+188, -1.6257e+184,  -2.60043e+170, -2.52941e+168, -3.06033e+116,
+    -4.56201e+52,  -3.56788e+50,  -9.9066e+38,   -3.07261e+31,  -2.1271e+09,
+    -1.91489e+09,  -1.73053e+09,  -9.30675e+08,  -26030,        -20453,
+    -15790,        -11699,        -111,          -97,           -78,
+    -63,           -58,           -1.53858e-06,  -2.98914e-12,  -1.14741e-39,
+    -8.20347e-57,  -1.48932e-59,  -3.17692e-66,  -8.93103e-81,  -3.91337e-83,
+    -6.0489e-92,   -8.83291e-113, -4.28266e-117, -1.92058e-178, -2.0567e-192,
+    -1.68167e-194, -1.51841e-214, -3.98738e-234, -7.31851e-242, -2.21875e-253,
+    -1.11612e-293, -0.0,          0.0,           2.22507e-308,  1.06526e-307,
+    4.16643e-227,  6.76624e-223,  2.0432e-197,   3.16254e-184,  1.37315e-173,
+    2.88603e-172,  1.54155e-99,   4.42923e-81,   1.40539e-73,   5.4462e-73,
+    1.24064e-58,   3.11167e-58,   2.75826e-39,   0.143815,      58,
+    67,            601,           7941,          11644,         13697,
+    25680,         29882,         1.32165e+08,   1.62439e+08,   4.16837e+08,
+    9.59097e+08,   1.32491e+09,   1.8728e+09,    1.0672e+17,    2.69606e+46,
+    1.98285e+79,   1.0098e+82,    7.93064e+88,   3.67444e+121,  9.36506e+123,
+    7.27954e+162,  3.05316e+168,  1.16171e+175,  1.64771e+189,  1.1622e+202,
+    2.00748e+239,  2.51778e+244,  3.90282e+306,  1.79769e+308,  V8_INFINITY};
+
+
+static const int32_t kInt32Values[] = {
+    -2147483647 - 1, -2104508227, -2103151830, -1435284490, -1378926425,
+    -1318814539,     -1289388009, -1287537572, -1279026536, -1241605942,
+    -1226046939,     -941837148,  -779818051,  -413830641,  -245798087,
+    -184657557,      -127145950,  -105483328,  -32325,      -26653,
+    -23858,          -23834,      -22363,      -19858,      -19044,
+    -18744,          -15528,      -5309,       -3372,       -2093,
+    -104,            -98,         -97,         -93,         -84,
+    -80,             -78,         -76,         -72,         -58,
+    -57,             -56,         -55,         -45,         -40,
+    -34,             -32,         -25,         -24,         -5,
+    -2,              0,           3,           10,          24,
+    34,              42,          46,          47,          48,
+    52,              56,          64,          65,          71,
+    76,              79,          81,          82,          97,
+    102,             103,         104,         106,         107,
+    109,             116,         122,         3653,        4485,
+    12405,           16504,       26262,       28704,       29755,
+    30554,           16476817,    605431957,   832401070,   873617242,
+    914205764,       1062628108,  1087581664,  1488498068,  1534668023,
+    1661587028,      1696896187,  1866841746,  2032089723,  2147483647};
+
+
+static const uint32_t kUint32Values[] = {
+    0x0,        0x5,        0x8,        0xc,        0xd,        0x26,
+    0x28,       0x29,       0x30,       0x34,       0x3e,       0x42,
+    0x50,       0x5b,       0x63,       0x71,       0x77,       0x7c,
+    0x83,       0x88,       0x96,       0x9c,       0xa3,       0xfa,
+    0x7a7,      0x165d,     0x234d,     0x3acb,     0x43a5,     0x4573,
+    0x5b4f,     0x5f14,     0x6996,     0x6c6e,     0x7289,     0x7b9a,
+    0x7bc9,     0x86bb,     0xa839,     0xaa41,     0xb03b,     0xc942,
+    0xce68,     0xcf4c,     0xd3ad,     0xdea3,     0xe90c,     0xed86,
+    0xfba5,     0x172dcc6,  0x114d8fc1, 0x182d6c9d, 0x1b1e3fad, 0x1db033bf,
+    0x1e1de755, 0x1f625c80, 0x28f6cf00, 0x2acb6a94, 0x2c20240e, 0x2f0fe54e,
+    0x31863a7c, 0x33325474, 0x3532fae3, 0x3bab82ea, 0x4c4b83a2, 0x4cd93d1e,
+    0x4f7331d4, 0x5491b09b, 0x57cc6ff9, 0x60d3b4dc, 0x653f5904, 0x690ae256,
+    0x69fe3276, 0x6bebf0ba, 0x6e2c69a3, 0x73b84ff7, 0x7b3a1924, 0x7ed032d9,
+    0x84dd734b, 0x8552ea53, 0x8680754f, 0x8e9660eb, 0x94fe2b9c, 0x972d30cf,
+    0x9b98c482, 0xb158667e, 0xb432932c, 0xb5b70989, 0xb669971a, 0xb7c359d1,
+    0xbeb15c0d, 0xc171c53d, 0xc743dd38, 0xc8e2af50, 0xc98e2df0, 0xd9d1cdf9,
+    0xdcc91049, 0xe46f396d, 0xee991950, 0xef64e521, 0xf7aeefc9, 0xffffffff};
+
+
+MATCHER(IsNaN, std::string(negation ? "isn't" : "is") + " NaN") {
+  return std::isnan(arg);
+}
+
+}  // namespace
+
+
+// -----------------------------------------------------------------------------
+// BooleanNot
+
+
+TEST_F(SimplifiedOperatorReducerTest, BooleanNotWithBooleanNot) {
+  Node* param0 = Parameter(0);
+  Reduction reduction = Reduce(
+      graph()->NewNode(simplified()->BooleanNot(),
+                       graph()->NewNode(simplified()->BooleanNot(), param0)));
+  ASSERT_TRUE(reduction.Changed());
+  EXPECT_EQ(param0, reduction.replacement());
+}
+
+
+TEST_F(SimplifiedOperatorReducerTest, BooleanNotWithConstant) {
+  // BooleanNot(false) => true
+  Reduction reduction0 =
+      Reduce(graph()->NewNode(simplified()->BooleanNot(), FalseConstant()));
+  ASSERT_TRUE(reduction0.Changed());
+  EXPECT_THAT(reduction0.replacement(), IsTrueConstant());
+
+  // BooleanNot(true) => false

[Jarin, 2014/08/21 20:11:24]

Is there a reason why these are not two separate tests?

[Benedikt Meurer, 2014/08/22 04:44:32]

Done. Refactored those tests.

+  Reduction reduction1 =
+      Reduce(graph()->NewNode(simplified()->BooleanNot(), TrueConstant()));
+  ASSERT_TRUE(reduction1.Changed());
+  EXPECT_THAT(reduction1.replacement(), IsFalseConstant());
+}
+
+
+TEST_F(SimplifiedOperatorReducerTest, BooleanNotWithParameter) {
+  EXPECT_FALSE(Reduce(graph()->NewNode(simplified()->BooleanNot(),
+                                       Parameter(0))).Changed());
+}
+
+
+// -----------------------------------------------------------------------------
+// ChangeBoolToBit
+
+
+TEST_F(SimplifiedOperatorReducerTest, ChangeBitToBoolWithChangeBoolToBit) {
+  Node* param0 = Parameter(0);
+  Reduction reduction = Reduce(graph()->NewNode(
+      simplified()->ChangeBitToBool(),
+      graph()->NewNode(simplified()->ChangeBoolToBit(), param0)));
+  ASSERT_TRUE(reduction.Changed());
+  EXPECT_EQ(param0, reduction.replacement());
+}
+
+
+TEST_F(SimplifiedOperatorReducerTest, ChangeBitToBoolWithConstant) {
+  // ChangeBitToBool(0) => false
+  Reduction reduction0 = Reduce(
+      graph()->NewNode(simplified()->ChangeBitToBool(), Int32Constant(0)));
+  ASSERT_TRUE(reduction0.Changed());
+  EXPECT_THAT(reduction0.replacement(), IsFalseConstant());
+
+  // ChangeBitToBool(1) => true
+  Reduction reduction1 = Reduce(
+      graph()->NewNode(simplified()->ChangeBitToBool(), Int32Constant(1)));
+  ASSERT_TRUE(reduction1.Changed());
+  EXPECT_THAT(reduction1.replacement(), IsTrueConstant());
+}
+
+
+TEST_F(SimplifiedOperatorReducerTest, ChangeBitToBoolWithParameter) {
+  Reduction reduction =
+      Reduce(graph()->NewNode(simplified()->ChangeBitToBool(), Parameter(0)));
+  EXPECT_FALSE(reduction.Changed());
+}
+
+
+// -----------------------------------------------------------------------------
+// ChangeBoolToBit
+
+
+TEST_F(SimplifiedOperatorReducerTest, ChangeBoolToBitWithConstant) {
+  // ChangeBoolToBit(false) => 0
+  Reduction reduction0 = Reduce(
+      graph()->NewNode(simplified()->ChangeBoolToBit(), FalseConstant()));
+  ASSERT_TRUE(reduction0.Changed());
+  EXPECT_THAT(reduction0.replacement(), IsInt32Constant(0));
+
+  // ChangeBoolToBit(true) => 1
+  Reduction reduction1 =
+      Reduce(graph()->NewNode(simplified()->ChangeBoolToBit(), TrueConstant()));
+  ASSERT_TRUE(reduction1.Changed());
+  EXPECT_THAT(reduction1.replacement(), IsInt32Constant(1));
+}
+
+
+TEST_F(SimplifiedOperatorReducerTest, ChangeBoolToBitWithParameter) {
+  Reduction reduction =
+      Reduce(graph()->NewNode(simplified()->ChangeBoolToBit(), Parameter(0)));
+  EXPECT_FALSE(reduction.Changed());
+}
+
+
+TEST_F(SimplifiedOperatorReducerTest, ChangeBoolToBitWithChangeBitToBool) {
+  Node* param0 = Parameter(0);
+  Reduction reduction = Reduce(graph()->NewNode(
+      simplified()->ChangeBoolToBit(),
+      graph()->NewNode(simplified()->ChangeBitToBool(), param0)));
+  ASSERT_TRUE(reduction.Changed());
+  EXPECT_EQ(param0, reduction.replacement());
+}
+
+
+// -----------------------------------------------------------------------------
+// ChangeFloat64ToTagged
+
+
+TEST_F(SimplifiedOperatorReducerTest, ChangeFloat64ToTaggedWithConstant) {
+  TRACED_FOREACH(double, n, kFloat64Values) {
+    Reduction reduction = Reduce(graph()->NewNode(
+        simplified()->ChangeFloat64ToTagged(), Float64Constant(n)));
+    ASSERT_TRUE(reduction.Changed());
+    EXPECT_THAT(reduction.replacement(), IsNumberConstant(n));
+  }
+}
+
+
+TEST_F(SimplifiedOperatorReducerTest, ChangeFloat64ToTaggedWithParameter) {
+  EXPECT_FALSE(Reduce(graph()->NewNode(simplified()->ChangeFloat64ToTagged(),
+                                       Parameter(0))).Changed());
+}
+
+
+// -----------------------------------------------------------------------------
+// ChangeInt32ToTagged
+
+
+TEST_F(SimplifiedOperatorReducerTest, ChangeInt32ToTaggedWithConstant) {
+  TRACED_FOREACH(int32_t, n, kInt32Values) {
+    Reduction reduction = Reduce(graph()->NewNode(
+        simplified()->ChangeInt32ToTagged(), Int32Constant(n)));
+    ASSERT_TRUE(reduction.Changed());
+    EXPECT_THAT(reduction.replacement(), IsNumberConstant(FastI2D(n)));
+  }
+}
+
+
+TEST_F(SimplifiedOperatorReducerTest, ChangeInt32ToTaggedWithParameter) {
+  Reduction reduction = Reduce(
+      graph()->NewNode(simplified()->ChangeInt32ToTagged(), Parameter(0)));
+  EXPECT_FALSE(reduction.Changed());
+}
+
+
+// -----------------------------------------------------------------------------
+// ChangeTaggedToFloat64
+
+
+TEST_F(SimplifiedOperatorReducerTest,
+       ChangeTaggedToFloat64WithChangeFloat64ToTagged) {
+  Node* param0 = Parameter(0);
+  Reduction reduction = Reduce(graph()->NewNode(
+      simplified()->ChangeTaggedToFloat64(),
+      graph()->NewNode(simplified()->ChangeFloat64ToTagged(), param0)));
+  ASSERT_TRUE(reduction.Changed());
+  EXPECT_EQ(param0, reduction.replacement());
+}
+
+
+TEST_F(SimplifiedOperatorReducerTest,
+       ChangeTaggedToFloat64WithChangeInt32ToTagged) {
+  Node* param0 = Parameter(0);
+  Reduction reduction = Reduce(graph()->NewNode(
+      simplified()->ChangeTaggedToFloat64(),
+      graph()->NewNode(simplified()->ChangeInt32ToTagged(), param0)));
+  ASSERT_TRUE(reduction.Changed());
+  EXPECT_THAT(reduction.replacement(), IsChangeInt32ToFloat64(param0));
+}
+
+
+TEST_F(SimplifiedOperatorReducerTest,
+       ChangeTaggedToFloat64WithChangeUint32ToTagged) {
+  Node* param0 = Parameter(0);
+  Reduction reduction = Reduce(graph()->NewNode(
+      simplified()->ChangeTaggedToFloat64(),
+      graph()->NewNode(simplified()->ChangeUint32ToTagged(), param0)));
+  ASSERT_TRUE(reduction.Changed());
+  EXPECT_THAT(reduction.replacement(), IsChangeUint32ToFloat64(param0));
+}
+
+
+TEST_F(SimplifiedOperatorReducerTest, ChangeTaggedToFloat64WithConstant) {
+  TRACED_FOREACH(double, n, kFloat64Values) {
+    Reduction reduction = Reduce(graph()->NewNode(
+        simplified()->ChangeTaggedToFloat64(), NumberConstant(n)));
+    ASSERT_TRUE(reduction.Changed());
+    EXPECT_THAT(reduction.replacement(), IsFloat64Constant(n));
+  }
+
+  // ChangeTaggedToFloat64(-NaN) => NaN
+  Reduction reduction0 =
+      Reduce(graph()->NewNode(simplified()->ChangeTaggedToFloat64(),
+                              NumberConstant(-base::OS::nan_value())));
+  ASSERT_TRUE(reduction0.Changed());
+  EXPECT_THAT(reduction0.replacement(), IsFloat64Constant(IsNaN()));
+
+  // ChangeTaggedToFloat64(+NaN) => NaN
+  Reduction reduction1 =
+      Reduce(graph()->NewNode(simplified()->ChangeTaggedToFloat64(),
+                              NumberConstant(base::OS::nan_value())));
+  ASSERT_TRUE(reduction1.Changed());
+  EXPECT_THAT(reduction1.replacement(), IsFloat64Constant(IsNaN()));
+}
+
+
+TEST_F(SimplifiedOperatorReducerTest, ChangeTaggedToFloat64WithParameter) {
+  EXPECT_FALSE(Reduce(graph()->NewNode(simplified()->ChangeTaggedToFloat64(),
+                                       Parameter(0))).Changed());
+}
+
+
+// -----------------------------------------------------------------------------
+// ChangeTaggedToInt32
+
+
+TEST_F(SimplifiedOperatorReducerTest,
+       ChangeTaggedToInt32WithChangeFloat64ToTagged) {
+  Node* param0 = Parameter(0);
+  Reduction reduction = Reduce(graph()->NewNode(
+      simplified()->ChangeTaggedToInt32(),
+      graph()->NewNode(simplified()->ChangeFloat64ToTagged(), param0)));
+  ASSERT_TRUE(reduction.Changed());
+  EXPECT_THAT(reduction.replacement(), IsTruncateFloat64ToInt32(param0));
+}
+
+
+TEST_F(SimplifiedOperatorReducerTest,
+       ChangeTaggedToInt32WithChangeInt32ToTagged) {
+  Node* param0 = Parameter(0);
+  Reduction reduction = Reduce(graph()->NewNode(
+      simplified()->ChangeTaggedToInt32(),
+      graph()->NewNode(simplified()->ChangeInt32ToTagged(), param0)));
+  ASSERT_TRUE(reduction.Changed());
+  EXPECT_EQ(param0, reduction.replacement());
+}
+
+
+TEST_F(SimplifiedOperatorReducerTest, ChangeTaggedToInt32WithConstant) {
+  TRACED_FOREACH(double, n, kFloat64Values) {
+    Reduction reduction = Reduce(graph()->NewNode(
+        simplified()->ChangeTaggedToInt32(), NumberConstant(n)));
+    ASSERT_TRUE(reduction.Changed());
+    EXPECT_THAT(reduction.replacement(), IsInt32Constant(DoubleToInt32(n)));
+  }
+
+  // ChangeTaggedToInt32(-NaN) => 0
+  Reduction reduction0 =
+      Reduce(graph()->NewNode(simplified()->ChangeTaggedToInt32(),
+                              NumberConstant(-base::OS::nan_value())));
+  ASSERT_TRUE(reduction0.Changed());
+  EXPECT_THAT(reduction0.replacement(), IsInt32Constant(0));
+
+  // ChangeTaggedToInt32(+NaN) => 0
+  Reduction reduction1 =
+      Reduce(graph()->NewNode(simplified()->ChangeTaggedToInt32(),
+                              NumberConstant(base::OS::nan_value())));
+  ASSERT_TRUE(reduction1.Changed());
+  EXPECT_THAT(reduction1.replacement(), IsInt32Constant(0));
+}
+
+
+TEST_F(SimplifiedOperatorReducerTest, ChangeTaggedToInt32WithParameter) {
+  Reduction reduction = Reduce(
+      graph()->NewNode(simplified()->ChangeTaggedToInt32(), Parameter(0)));
+  EXPECT_FALSE(reduction.Changed());
+}
+
+
+// -----------------------------------------------------------------------------
+// ChangeTaggedToUint32
+
+
+TEST_F(SimplifiedOperatorReducerTest,
+       ChangeTaggedToUint32WithChangeFloat64ToTagged) {
+  Node* param0 = Parameter(0);
+  Reduction reduction = Reduce(graph()->NewNode(
+      simplified()->ChangeTaggedToUint32(),
+      graph()->NewNode(simplified()->ChangeFloat64ToTagged(), param0)));
+  ASSERT_TRUE(reduction.Changed());
+  EXPECT_THAT(reduction.replacement(), IsTruncateFloat64ToInt32(param0));
+}
+
+
+TEST_F(SimplifiedOperatorReducerTest,
+       ChangeTaggedToUint32WithChangeUint32ToTagged) {
+  Node* param0 = Parameter(0);
+  Reduction reduction = Reduce(graph()->NewNode(
+      simplified()->ChangeTaggedToUint32(),
+      graph()->NewNode(simplified()->ChangeUint32ToTagged(), param0)));
+  ASSERT_TRUE(reduction.Changed());
+  EXPECT_EQ(param0, reduction.replacement());
+}
+
+
+TEST_F(SimplifiedOperatorReducerTest, ChangeTaggedToUint32WithConstant) {
+  TRACED_FOREACH(double, n, kFloat64Values) {
+    Reduction reduction = Reduce(graph()->NewNode(
+        simplified()->ChangeTaggedToUint32(), NumberConstant(n)));
+    ASSERT_TRUE(reduction.Changed());
+    EXPECT_THAT(reduction.replacement(),
+                IsInt32Constant(BitCast<int32_t>(DoubleToUint32(n))));
+  }
+
+  // ChangeTaggedToUint32(-NaN) => 0
+  Reduction reduction0 =
+      Reduce(graph()->NewNode(simplified()->ChangeTaggedToUint32(),
+                              NumberConstant(-base::OS::nan_value())));
+  ASSERT_TRUE(reduction0.Changed());
+  EXPECT_THAT(reduction0.replacement(), IsInt32Constant(0));
+
+  // ChangeTaggedToUint32(+NaN) => 0
+  Reduction reduction1 =
+      Reduce(graph()->NewNode(simplified()->ChangeTaggedToUint32(),
+                              NumberConstant(base::OS::nan_value())));
+  ASSERT_TRUE(reduction1.Changed());
+  EXPECT_THAT(reduction1.replacement(), IsInt32Constant(0));
+}
+
+
+TEST_F(SimplifiedOperatorReducerTest, ChangeTaggedToUint32WithParameter) {
+  Reduction reduction = Reduce(
+      graph()->NewNode(simplified()->ChangeTaggedToUint32(), Parameter(0)));
+  EXPECT_FALSE(reduction.Changed());
+}
+
+
+// -----------------------------------------------------------------------------
+// ChangeUint32ToTagged
+
+
+TEST_F(SimplifiedOperatorReducerTest, ChangeUint32ToTagged) {
+  TRACED_FOREACH(uint32_t, n, kUint32Values) {
+    Reduction reduction =
+        Reduce(graph()->NewNode(simplified()->ChangeUint32ToTagged(),
+                                Int32Constant(BitCast<int32_t>(n))));
+    ASSERT_TRUE(reduction.Changed());
+    EXPECT_THAT(reduction.replacement(), IsNumberConstant(FastUI2D(n)));
+  }
+}
+
+
+TEST_F(SimplifiedOperatorReducerTest, ChangeUint32ToTaggedWithParameter) {
+  Reduction reduction = Reduce(
+      graph()->NewNode(simplified()->ChangeUint32ToTagged(), Parameter(0)));
+  EXPECT_FALSE(reduction.Changed());
+}
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8