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/common-operator.h" 6 #include "src/compiler/graph.h" 7 #include "src/compiler/graph-visualizer.h" 8 #include "src/compiler/js-operator.h" 9 #include "src/compiler/machine-operator.h" 10 #include "src/compiler/node.h" 11 #include "src/compiler/operator.h" 12 #include "src/compiler/schedule.h" 13 #include "src/compiler/scheduler.h" 14 #include "src/compiler/source-position.h" 15 #include "src/compiler/verifier.h" 16 #include "test/cctest/cctest.h" 17 18 namespace v8 { 19 namespace internal { 20 namespace compiler { 21 22 static Operator dummy_operator1(IrOpcode::kParameter, Operator::kNoWrite, 23 "dummy", 1, 0, 0, 1, 0, 0); 24 static Operator dummy_operator6(IrOpcode::kParameter, Operator::kNoWrite, 25 "dummy", 6, 0, 0, 1, 0, 0); 26 27 28 TEST(NodeWithNullInputReachableFromEnd) { 29 HandleAndZoneScope scope; 30 Graph graph(scope.main_zone()); 31 CommonOperatorBuilder common(scope.main_zone()); 32 33 Node* start = graph.NewNode(common.Start(0)); 34 graph.SetStart(start); 35 Node* k = graph.NewNode(common.Int32Constant(0)); 36 Node* phi = 37 graph.NewNode(common.Phi(MachineRepresentation::kTagged, 1), k, start); 38 phi->ReplaceInput(0, NULL); 39 graph.SetEnd(phi); 40 41 OFStream os(stdout); 42 SourcePositionTable table(&graph); 43 os << AsJSON(graph, &table); 44 } 45 46 47 TEST(NodeWithNullControlReachableFromEnd) { 48 HandleAndZoneScope scope; 49 Graph graph(scope.main_zone()); 50 CommonOperatorBuilder common(scope.main_zone()); 51 52 Node* start = graph.NewNode(common.Start(0)); 53 graph.SetStart(start); 54 Node* k = graph.NewNode(common.Int32Constant(0)); 55 Node* phi = 56 graph.NewNode(common.Phi(MachineRepresentation::kTagged, 1), k, start); 57 phi->ReplaceInput(1, NULL); 58 graph.SetEnd(phi); 59 60 OFStream os(stdout); 61 SourcePositionTable table(&graph); 62 os << AsJSON(graph, &table); 63 } 64 65 66 TEST(NodeWithNullInputReachableFromStart) { 67 HandleAndZoneScope scope; 68 Graph graph(scope.main_zone()); 69 CommonOperatorBuilder common(scope.main_zone()); 70 71 Node* start = graph.NewNode(common.Start(0)); 72 graph.SetStart(start); 73 Node* k = graph.NewNode(common.Int32Constant(0)); 74 Node* phi = 75 graph.NewNode(common.Phi(MachineRepresentation::kTagged, 1), k, start); 76 phi->ReplaceInput(0, NULL); 77 graph.SetEnd(start); 78 79 OFStream os(stdout); 80 SourcePositionTable table(&graph); 81 os << AsJSON(graph, &table); 82 } 83 84 85 TEST(NodeWithNullControlReachableFromStart) { 86 HandleAndZoneScope scope; 87 Graph graph(scope.main_zone()); 88 CommonOperatorBuilder common(scope.main_zone()); 89 90 Node* start = graph.NewNode(common.Start(0)); 91 graph.SetStart(start); 92 Node* merge = graph.NewNode(common.Merge(2), start, start); 93 merge->ReplaceInput(1, NULL); 94 graph.SetEnd(merge); 95 96 OFStream os(stdout); 97 SourcePositionTable table(&graph); 98 os << AsJSON(graph, &table); 99 } 100 101 102 TEST(NodeNetworkOfDummiesReachableFromEnd) { 103 HandleAndZoneScope scope; 104 Graph graph(scope.main_zone()); 105 CommonOperatorBuilder common(scope.main_zone()); 106 107 Node* start = graph.NewNode(common.Start(0)); 108 graph.SetStart(start); 109 Node* n2 = graph.NewNode(&dummy_operator1, graph.start()); 110 Node* n3 = graph.NewNode(&dummy_operator1, graph.start()); 111 Node* n4 = graph.NewNode(&dummy_operator1, n2); 112 Node* n5 = graph.NewNode(&dummy_operator1, n2); 113 Node* n6 = graph.NewNode(&dummy_operator1, n3); 114 Node* n7 = graph.NewNode(&dummy_operator1, n3); 115 Node* n8 = graph.NewNode(&dummy_operator1, n5); 116 Node* n9 = graph.NewNode(&dummy_operator1, n5); 117 Node* n10 = graph.NewNode(&dummy_operator1, n9); 118 Node* n11 = graph.NewNode(&dummy_operator1, n9); 119 Node* end_dependencies[6] = {n4, n8, n10, n11, n6, n7}; 120 Node* end = graph.NewNode(&dummy_operator6, 6, end_dependencies); 121 graph.SetEnd(end); 122 123 OFStream os(stdout); 124 SourcePositionTable table(&graph); 125 os << AsJSON(graph, &table); 126 } 127 128 } // namespace compiler 129 } // namespace internal 130 } // namespace v8 131
