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 #ifndef V8_COMPILER_TYPER_H_
6 #define V8_COMPILER_TYPER_H_
7 
8 #include "src/base/flags.h"
9 #include "src/compiler/graph.h"
10 #include "src/types.h"
11 
12 namespace v8 {
13 namespace internal {
14 
15 // Forward declarations.
16 class CompilationDependencies;
17 class TypeCache;
18 
19 namespace compiler {
20 
21 
22 class Typer {
23  public:
24   // Flags that control the mode of operation.
25   enum Flag {
26     kNoFlags = 0u,
27     kDeoptimizationEnabled = 1u << 0,
28   };
29   typedef base::Flags<Flag> Flags;
30 
31   Typer(Isolate* isolate, Graph* graph, Flags flags = kNoFlags,
32         CompilationDependencies* dependencies = nullptr,
33         Type::FunctionType* function_type = nullptr);
34   ~Typer();
35 
36   void Run();
37   // TODO(bmeurer,jarin): Remove this once we have a notion of "roots" on Graph.
38   void Run(const ZoneVector<Node*>& roots);
39 
40  private:
41   class Visitor;
42   class Decorator;
43 
graph()44   Graph* graph() const { return graph_; }
zone()45   Zone* zone() const { return graph()->zone(); }
isolate()46   Isolate* isolate() const { return isolate_; }
flags()47   Flags flags() const { return flags_; }
dependencies()48   CompilationDependencies* dependencies() const { return dependencies_; }
function_type()49   Type::FunctionType* function_type() const { return function_type_; }
50 
51   Isolate* const isolate_;
52   Graph* const graph_;
53   Flags const flags_;
54   CompilationDependencies* const dependencies_;
55   Type::FunctionType* function_type_;
56   Decorator* decorator_;
57   TypeCache const& cache_;
58 
59   Type* singleton_false_;
60   Type* singleton_true_;
61   Type* singleton_the_hole_;
62   Type* signed32ish_;
63   Type* unsigned32ish_;
64   Type* falsish_;
65   Type* truish_;
66 
67   DISALLOW_COPY_AND_ASSIGN(Typer);
68 };
69 
70 DEFINE_OPERATORS_FOR_FLAGS(Typer::Flags)
71 
72 }  // namespace compiler
73 }  // namespace internal
74 }  // namespace v8
75 
76 #endif  // V8_COMPILER_TYPER_H_
77