1 //===- toyc.cpp - The Toy Compiler ----------------------------------------===//
2 //
3 // Part of the MLIR Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements the entry point for the Toy compiler.
10 //
11 //===----------------------------------------------------------------------===//
12
13 #include "toy/Dialect.h"
14 #include "toy/MLIRGen.h"
15 #include "toy/Parser.h"
16 #include <memory>
17
18 #include "mlir/Analysis/Verifier.h"
19 #include "mlir/IR/MLIRContext.h"
20 #include "mlir/IR/Module.h"
21 #include "mlir/Parser.h"
22
23 #include "llvm/ADT/StringRef.h"
24 #include "llvm/Support/CommandLine.h"
25 #include "llvm/Support/ErrorOr.h"
26 #include "llvm/Support/MemoryBuffer.h"
27 #include "llvm/Support/SourceMgr.h"
28 #include "llvm/Support/raw_ostream.h"
29
30 using namespace toy;
31 namespace cl = llvm::cl;
32
33 static cl::opt<std::string> inputFilename(cl::Positional,
34 cl::desc("<input toy file>"),
35 cl::init("-"),
36 cl::value_desc("filename"));
37
38 namespace {
39 enum InputType { Toy, MLIR };
40 }
41 static cl::opt<enum InputType> inputType(
42 "x", cl::init(Toy), cl::desc("Decided the kind of output desired"),
43 cl::values(clEnumValN(Toy, "toy", "load the input file as a Toy source.")),
44 cl::values(clEnumValN(MLIR, "mlir",
45 "load the input file as an MLIR file")));
46
47 namespace {
48 enum Action { None, DumpAST, DumpMLIR };
49 }
50 static cl::opt<enum Action> emitAction(
51 "emit", cl::desc("Select the kind of output desired"),
52 cl::values(clEnumValN(DumpAST, "ast", "output the AST dump")),
53 cl::values(clEnumValN(DumpMLIR, "mlir", "output the MLIR dump")));
54
55 /// Returns a Toy AST resulting from parsing the file or a nullptr on error.
parseInputFile(llvm::StringRef filename)56 std::unique_ptr<toy::ModuleAST> parseInputFile(llvm::StringRef filename) {
57 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> fileOrErr =
58 llvm::MemoryBuffer::getFileOrSTDIN(filename);
59 if (std::error_code ec = fileOrErr.getError()) {
60 llvm::errs() << "Could not open input file: " << ec.message() << "\n";
61 return nullptr;
62 }
63 auto buffer = fileOrErr.get()->getBuffer();
64 LexerBuffer lexer(buffer.begin(), buffer.end(), filename);
65 Parser parser(lexer);
66 return parser.parseModule();
67 }
68
dumpMLIR()69 int dumpMLIR() {
70 // Register our Dialect with MLIR.
71 mlir::registerDialect<mlir::toy::ToyDialect>();
72
73 mlir::MLIRContext context;
74
75 // Handle '.toy' input to the compiler.
76 if (inputType != InputType::MLIR &&
77 !llvm::StringRef(inputFilename).endswith(".mlir")) {
78 auto moduleAST = parseInputFile(inputFilename);
79 if (!moduleAST)
80 return 6;
81 mlir::OwningModuleRef module = mlirGen(context, *moduleAST);
82 if (!module)
83 return 1;
84
85 module->dump();
86 return 0;
87 }
88
89 // Otherwise, the input is '.mlir'.
90 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> fileOrErr =
91 llvm::MemoryBuffer::getFileOrSTDIN(inputFilename);
92 if (std::error_code EC = fileOrErr.getError()) {
93 llvm::errs() << "Could not open input file: " << EC.message() << "\n";
94 return -1;
95 }
96
97 // Parse the input mlir.
98 llvm::SourceMgr sourceMgr;
99 sourceMgr.AddNewSourceBuffer(std::move(*fileOrErr), llvm::SMLoc());
100 mlir::OwningModuleRef module = mlir::parseSourceFile(sourceMgr, &context);
101 if (!module) {
102 llvm::errs() << "Error can't load file " << inputFilename << "\n";
103 return 3;
104 }
105
106 module->dump();
107 return 0;
108 }
109
dumpAST()110 int dumpAST() {
111 if (inputType == InputType::MLIR) {
112 llvm::errs() << "Can't dump a Toy AST when the input is MLIR\n";
113 return 5;
114 }
115
116 auto moduleAST = parseInputFile(inputFilename);
117 if (!moduleAST)
118 return 1;
119
120 dump(*moduleAST);
121 return 0;
122 }
123
main(int argc,char ** argv)124 int main(int argc, char **argv) {
125 cl::ParseCommandLineOptions(argc, argv, "toy compiler\n");
126
127 switch (emitAction) {
128 case Action::DumpAST:
129 return dumpAST();
130 case Action::DumpMLIR:
131 return dumpMLIR();
132 default:
133 llvm::errs() << "No action specified (parsing only?), use -emit=<action>\n";
134 }
135
136 return 0;
137 }
138