1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
// Copyright 2015 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/control-flow-optimizer.h"
#include "src/compiler/js-operator.h"
#include "src/compiler/machine-operator.h"
#include "test/unittests/compiler/graph-unittest.h"
#include "test/unittests/compiler/node-test-utils.h"
#include "testing/gmock-support.h"
using testing::AllOf;
using testing::Capture;
using testing::CaptureEq;
namespace v8 {
namespace internal {
namespace compiler {
class ControlFlowOptimizerTest : public GraphTest {
public:
explicit ControlFlowOptimizerTest(int num_parameters = 3)
: GraphTest(num_parameters), machine_(zone()), javascript_(zone()) {}
~ControlFlowOptimizerTest() override {}
protected:
void Optimize() {
ControlFlowOptimizer optimizer(graph(), common(), machine(), zone());
optimizer.Optimize();
}
JSOperatorBuilder* javascript() { return &javascript_; }
MachineOperatorBuilder* machine() { return &machine_; }
private:
MachineOperatorBuilder machine_;
JSOperatorBuilder javascript_;
};
TEST_F(ControlFlowOptimizerTest, BuildSwitch1) {
Node* index = Parameter(0);
Node* branch0 = graph()->NewNode(
common()->Branch(),
graph()->NewNode(machine()->Word32Equal(), index, Int32Constant(0)),
start());
Node* if_true0 = graph()->NewNode(common()->IfTrue(), branch0);
Node* if_false0 = graph()->NewNode(common()->IfFalse(), branch0);
Node* branch1 = graph()->NewNode(
common()->Branch(),
graph()->NewNode(machine()->Word32Equal(), index, Int32Constant(1)),
if_false0);
Node* if_true1 = graph()->NewNode(common()->IfTrue(), branch1);
Node* if_false1 = graph()->NewNode(common()->IfFalse(), branch1);
Node* merge =
graph()->NewNode(common()->Merge(3), if_true0, if_true1, if_false1);
graph()->SetEnd(graph()->NewNode(common()->End(1), merge));
Optimize();
Capture<Node*> switch_capture;
EXPECT_THAT(end(),
IsEnd(IsMerge(IsIfValue(0, CaptureEq(&switch_capture)),
IsIfValue(1, CaptureEq(&switch_capture)),
IsIfDefault(AllOf(CaptureEq(&switch_capture),
IsSwitch(index, start()))))));
}
TEST_F(ControlFlowOptimizerTest, BuildSwitch2) {
Node* input = Parameter(0);
Node* context = Parameter(1);
Node* index = graph()->NewNode(javascript()->ToNumber(), input, context,
start(), start(), start());
Node* if_success = graph()->NewNode(common()->IfSuccess(), index);
Node* branch0 = graph()->NewNode(
common()->Branch(),
graph()->NewNode(machine()->Word32Equal(), index, Int32Constant(0)),
if_success);
Node* if_true0 = graph()->NewNode(common()->IfTrue(), branch0);
Node* if_false0 = graph()->NewNode(common()->IfFalse(), branch0);
Node* branch1 = graph()->NewNode(
common()->Branch(),
graph()->NewNode(machine()->Word32Equal(), index, Int32Constant(1)),
if_false0);
Node* if_true1 = graph()->NewNode(common()->IfTrue(), branch1);
Node* if_false1 = graph()->NewNode(common()->IfFalse(), branch1);
Node* merge =
graph()->NewNode(common()->Merge(3), if_true0, if_true1, if_false1);
graph()->SetEnd(graph()->NewNode(common()->End(1), merge));
Optimize();
Capture<Node*> switch_capture;
EXPECT_THAT(
end(),
IsEnd(IsMerge(IsIfValue(0, CaptureEq(&switch_capture)),
IsIfValue(1, CaptureEq(&switch_capture)),
IsIfDefault(AllOf(CaptureEq(&switch_capture),
IsSwitch(index, IsIfSuccess(index)))))));
}
} // namespace compiler
} // namespace internal
} // namespace v8
|
