Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 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 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 5 | #include "src/compiler/simplified-operator-reducer.h" |
| 6 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 7 | #include "src/compiler/js-graph.h" |
| 8 | #include "src/compiler/machine-operator.h" |
| 9 | #include "src/compiler/node-matchers.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 10 | #include "src/compiler/operator-properties.h" |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 11 | #include "src/compiler/simplified-operator.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 12 | #include "src/conversions-inl.h" |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 13 | #include "src/type-cache.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 14 | |
| 15 | namespace v8 { |
| 16 | namespace internal { |
| 17 | namespace compiler { |
| 18 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 19 | namespace { |
| 20 | |
| 21 | Decision DecideObjectIsSmi(Node* const input) { |
| 22 | NumberMatcher m(input); |
| 23 | if (m.HasValue()) { |
| 24 | return IsSmiDouble(m.Value()) ? Decision::kTrue : Decision::kFalse; |
| 25 | } |
| 26 | if (m.IsAllocate()) return Decision::kFalse; |
| 27 | if (m.IsChangeBitToTagged()) return Decision::kFalse; |
| 28 | if (m.IsChangeInt31ToTaggedSigned()) return Decision::kTrue; |
| 29 | if (m.IsHeapConstant()) return Decision::kFalse; |
| 30 | return Decision::kUnknown; |
| 31 | } |
| 32 | |
| 33 | } // namespace |
| 34 | |
| 35 | SimplifiedOperatorReducer::SimplifiedOperatorReducer(Editor* editor, |
| 36 | JSGraph* jsgraph) |
| 37 | : AdvancedReducer(editor), |
| 38 | jsgraph_(jsgraph), |
| 39 | type_cache_(TypeCache::Get()) {} |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 40 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 41 | SimplifiedOperatorReducer::~SimplifiedOperatorReducer() {} |
| 42 | |
| 43 | |
| 44 | Reduction SimplifiedOperatorReducer::Reduce(Node* node) { |
| 45 | switch (node->opcode()) { |
| 46 | case IrOpcode::kBooleanNot: { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 47 | HeapObjectMatcher m(node->InputAt(0)); |
| 48 | if (m.HasValue()) { |
| 49 | return Replace(jsgraph()->BooleanConstant(!m.Value()->BooleanValue())); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 50 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 51 | if (m.IsBooleanNot()) return Replace(m.InputAt(0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 52 | break; |
| 53 | } |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 54 | case IrOpcode::kChangeBitToTagged: { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 55 | Int32Matcher m(node->InputAt(0)); |
| 56 | if (m.Is(0)) return Replace(jsgraph()->FalseConstant()); |
| 57 | if (m.Is(1)) return Replace(jsgraph()->TrueConstant()); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 58 | if (m.IsChangeTaggedToBit()) return Replace(m.InputAt(0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 59 | break; |
| 60 | } |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 61 | case IrOpcode::kChangeTaggedToBit: { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 62 | HeapObjectMatcher m(node->InputAt(0)); |
| 63 | if (m.HasValue()) return ReplaceInt32(m.Value()->BooleanValue()); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 64 | if (m.IsChangeBitToTagged()) return Replace(m.InputAt(0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 65 | break; |
| 66 | } |
| 67 | case IrOpcode::kChangeFloat64ToTagged: { |
| 68 | Float64Matcher m(node->InputAt(0)); |
| 69 | if (m.HasValue()) return ReplaceNumber(m.Value()); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 70 | if (m.IsChangeTaggedToFloat64()) return Replace(m.node()->InputAt(0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 71 | break; |
| 72 | } |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 73 | case IrOpcode::kChangeInt31ToTaggedSigned: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 74 | case IrOpcode::kChangeInt32ToTagged: { |
| 75 | Int32Matcher m(node->InputAt(0)); |
| 76 | if (m.HasValue()) return ReplaceNumber(m.Value()); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 77 | if (m.IsChangeTaggedToInt32() || m.IsChangeTaggedSignedToInt32()) { |
| 78 | return Replace(m.InputAt(0)); |
| 79 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 80 | break; |
| 81 | } |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 82 | case IrOpcode::kChangeTaggedToFloat64: |
| 83 | case IrOpcode::kTruncateTaggedToFloat64: { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 84 | NumberMatcher m(node->InputAt(0)); |
| 85 | if (m.HasValue()) return ReplaceFloat64(m.Value()); |
| 86 | if (m.IsChangeFloat64ToTagged()) return Replace(m.node()->InputAt(0)); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 87 | if (m.IsChangeInt31ToTaggedSigned() || m.IsChangeInt32ToTagged()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 88 | return Change(node, machine()->ChangeInt32ToFloat64(), m.InputAt(0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 89 | } |
| 90 | if (m.IsChangeUint32ToTagged()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 91 | return Change(node, machine()->ChangeUint32ToFloat64(), m.InputAt(0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 92 | } |
| 93 | break; |
| 94 | } |
| 95 | case IrOpcode::kChangeTaggedToInt32: { |
| 96 | NumberMatcher m(node->InputAt(0)); |
| 97 | if (m.HasValue()) return ReplaceInt32(DoubleToInt32(m.Value())); |
| 98 | if (m.IsChangeFloat64ToTagged()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 99 | return Change(node, machine()->ChangeFloat64ToInt32(), m.InputAt(0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 100 | } |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 101 | if (m.IsChangeInt31ToTaggedSigned() || m.IsChangeInt32ToTagged()) { |
| 102 | return Replace(m.InputAt(0)); |
| 103 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 104 | break; |
| 105 | } |
| 106 | case IrOpcode::kChangeTaggedToUint32: { |
| 107 | NumberMatcher m(node->InputAt(0)); |
| 108 | if (m.HasValue()) return ReplaceUint32(DoubleToUint32(m.Value())); |
| 109 | if (m.IsChangeFloat64ToTagged()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 110 | return Change(node, machine()->ChangeFloat64ToUint32(), m.InputAt(0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 111 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 112 | if (m.IsChangeUint32ToTagged()) return Replace(m.InputAt(0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 113 | break; |
| 114 | } |
| 115 | case IrOpcode::kChangeUint32ToTagged: { |
| 116 | Uint32Matcher m(node->InputAt(0)); |
| 117 | if (m.HasValue()) return ReplaceNumber(FastUI2D(m.Value())); |
| 118 | break; |
| 119 | } |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 120 | case IrOpcode::kTruncateTaggedToWord32: { |
| 121 | NumberMatcher m(node->InputAt(0)); |
| 122 | if (m.HasValue()) return ReplaceInt32(DoubleToInt32(m.Value())); |
| 123 | if (m.IsChangeInt31ToTaggedSigned() || m.IsChangeInt32ToTagged() || |
| 124 | m.IsChangeUint32ToTagged()) { |
| 125 | return Replace(m.InputAt(0)); |
| 126 | } |
| 127 | if (m.IsChangeFloat64ToTagged()) { |
| 128 | return Change(node, machine()->TruncateFloat64ToWord32(), m.InputAt(0)); |
| 129 | } |
| 130 | break; |
| 131 | } |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 132 | case IrOpcode::kCheckTaggedPointer: { |
| 133 | Node* const input = node->InputAt(0); |
| 134 | if (DecideObjectIsSmi(input) == Decision::kFalse) { |
| 135 | ReplaceWithValue(node, input); |
| 136 | return Replace(input); |
| 137 | } |
| 138 | break; |
| 139 | } |
| 140 | case IrOpcode::kCheckTaggedSigned: { |
| 141 | Node* const input = node->InputAt(0); |
| 142 | if (DecideObjectIsSmi(input) == Decision::kTrue) { |
| 143 | ReplaceWithValue(node, input); |
| 144 | return Replace(input); |
| 145 | } |
| 146 | break; |
| 147 | } |
| 148 | case IrOpcode::kObjectIsSmi: { |
| 149 | Node* const input = node->InputAt(0); |
| 150 | switch (DecideObjectIsSmi(input)) { |
| 151 | case Decision::kTrue: |
| 152 | return ReplaceBoolean(true); |
| 153 | case Decision::kFalse: |
| 154 | return ReplaceBoolean(false); |
| 155 | case Decision::kUnknown: |
| 156 | break; |
| 157 | } |
| 158 | break; |
| 159 | } |
| 160 | case IrOpcode::kNumberAbs: { |
| 161 | NumberMatcher m(node->InputAt(0)); |
| 162 | if (m.HasValue()) return ReplaceNumber(std::fabs(m.Value())); |
| 163 | break; |
| 164 | } |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 165 | case IrOpcode::kNumberCeil: |
| 166 | case IrOpcode::kNumberFloor: |
| 167 | case IrOpcode::kNumberRound: |
| 168 | case IrOpcode::kNumberTrunc: { |
| 169 | Node* const input = NodeProperties::GetValueInput(node, 0); |
| 170 | Type* const input_type = NodeProperties::GetType(input); |
| 171 | if (input_type->Is(type_cache_.kIntegerOrMinusZeroOrNaN)) { |
| 172 | return Replace(input); |
| 173 | } |
| 174 | break; |
| 175 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 176 | case IrOpcode::kReferenceEqual: |
| 177 | return ReduceReferenceEqual(node); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 178 | case IrOpcode::kTypeGuard: |
| 179 | return ReduceTypeGuard(node); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 180 | default: |
| 181 | break; |
| 182 | } |
| 183 | return NoChange(); |
| 184 | } |
| 185 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 186 | Reduction SimplifiedOperatorReducer::ReduceReferenceEqual(Node* node) { |
| 187 | DCHECK_EQ(IrOpcode::kReferenceEqual, node->opcode()); |
| 188 | Node* const left = NodeProperties::GetValueInput(node, 0); |
| 189 | Node* const right = NodeProperties::GetValueInput(node, 1); |
| 190 | HeapObjectMatcher match_left(left); |
| 191 | HeapObjectMatcher match_right(right); |
| 192 | if (match_left.HasValue() && match_right.HasValue()) { |
| 193 | if (match_left.Value().is_identical_to(match_right.Value())) { |
| 194 | return Replace(jsgraph()->TrueConstant()); |
| 195 | } else { |
| 196 | return Replace(jsgraph()->FalseConstant()); |
| 197 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 198 | } |
| 199 | return NoChange(); |
| 200 | } |
| 201 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 202 | Reduction SimplifiedOperatorReducer::ReduceTypeGuard(Node* node) { |
| 203 | DCHECK_EQ(IrOpcode::kTypeGuard, node->opcode()); |
| 204 | Node* const input = NodeProperties::GetValueInput(node, 0); |
| 205 | Type* const input_type = NodeProperties::GetTypeOrAny(input); |
| 206 | Type* const guard_type = TypeOf(node->op()); |
| 207 | if (input_type->Is(guard_type)) return Replace(input); |
| 208 | return NoChange(); |
| 209 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 210 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 211 | Reduction SimplifiedOperatorReducer::Change(Node* node, const Operator* op, |
| 212 | Node* a) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 213 | DCHECK_EQ(node->InputCount(), OperatorProperties::GetTotalInputCount(op)); |
| 214 | DCHECK_LE(1, node->InputCount()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 215 | node->ReplaceInput(0, a); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 216 | NodeProperties::ChangeOp(node, op); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 217 | return Changed(node); |
| 218 | } |
| 219 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 220 | Reduction SimplifiedOperatorReducer::ReplaceBoolean(bool value) { |
| 221 | return Replace(jsgraph()->BooleanConstant(value)); |
| 222 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 223 | |
| 224 | Reduction SimplifiedOperatorReducer::ReplaceFloat64(double value) { |
| 225 | return Replace(jsgraph()->Float64Constant(value)); |
| 226 | } |
| 227 | |
| 228 | |
| 229 | Reduction SimplifiedOperatorReducer::ReplaceInt32(int32_t value) { |
| 230 | return Replace(jsgraph()->Int32Constant(value)); |
| 231 | } |
| 232 | |
| 233 | |
| 234 | Reduction SimplifiedOperatorReducer::ReplaceNumber(double value) { |
| 235 | return Replace(jsgraph()->Constant(value)); |
| 236 | } |
| 237 | |
| 238 | |
| 239 | Reduction SimplifiedOperatorReducer::ReplaceNumber(int32_t value) { |
| 240 | return Replace(jsgraph()->Constant(value)); |
| 241 | } |
| 242 | |
| 243 | |
| 244 | Graph* SimplifiedOperatorReducer::graph() const { return jsgraph()->graph(); } |
| 245 | |
| 246 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 247 | MachineOperatorBuilder* SimplifiedOperatorReducer::machine() const { |
| 248 | return jsgraph()->machine(); |
| 249 | } |
| 250 | |
| 251 | } // namespace compiler |
| 252 | } // namespace internal |
| 253 | } // namespace v8 |