initial commit

Author: simonperrigault

.gitignore

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+# Prerequisites
+*.d
+
+# Compiled Object files
+*.slo
+*.lo
+*.o
+*.obj
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Compiled Dynamic libraries
+*.so
+*.dylib
+*.dll
+
+# Fortran module files
+*.mod
+*.smod
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+*.lib
+
+# Executables
+*.exe
+*.out
+*.app
+
+*.pdf

compiler/CodeGenVisitor.cpp

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+#include "CodeGenVisitor.h"
+
+antlrcpp::Any CodeGenVisitor::visitProg(ifccParser::ProgContext *ctx) 
+{
+    std::cout<< ".globl main\n" ;
+    std::cout<< " main: \n" ;
+
+    this->visit( ctx->return_stmt() );
+    
+    std::cout << "    ret\n";
+
+    return 0;
+}
+
+
+antlrcpp::Any CodeGenVisitor::visitReturn_stmt(ifccParser::Return_stmtContext *ctx)
+{
+    int retval = stoi(ctx->CONST()->getText());
+
+    std::cout << "    movl $"<<retval<<", %eax\n" ;
+
+    return 0;
+}

compiler/CodeGenVisitor.h

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+#pragma once
+
+
+#include "antlr4-runtime.h"
+#include "generated/ifccBaseVisitor.h"
+
+
+class  CodeGenVisitor : public ifccBaseVisitor {
+	public:
+        virtual antlrcpp::Any visitProg(ifccParser::ProgContext *ctx) override ;
+        virtual antlrcpp::Any visitReturn_stmt(ifccParser::Return_stmtContext *ctx) override;
+};
+

compiler/Makefile

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+# config.mk contains the paths to antlr4 etc.
+# Each student should have a config.mk corresponding to her system.
+# Examples are  ubuntu.mk, DI.mk, fedora.mk
+# Then config.mk should be in the .gitignore of your project
+include config.mk
+
+CC=g++
+CCFLAGS=-g -c -std=c++17 -I$(ANTLRINC) -Wno-attributes # -Wno-defaulted-function-deleted -Wno-unknown-warning-option
+LDFLAGS=-g
+
+default: all
+all: ifcc
+
+##########################################
+# link together all pieces of our compiler 
+OBJECTS=build/ifccBaseVisitor.o \
+	build/ifccLexer.o \
+	build/ifccVisitor.o \
+	build/ifccParser.o \
+	build/main.o \
+	build/CodeGenVisitor.o
+
+ifcc: $(OBJECTS)
+	@mkdir -p build
+	$(CC) $(LDFLAGS) build/*.o $(ANTLRLIB) -o ifcc
+
+##########################################
+# compile our hand-writen C++ code: main(), CodeGenVisitor, etc.
+build/%.o: %.cpp generated/ifccParser.cpp
+	@mkdir -p build
+	$(CC) $(CCFLAGS) -MMD -o $@ $< 
+
+##########################################
+# compile all the antlr-generated C++
+build/%.o: generated/%.cpp
+	@mkdir -p build
+	$(CC) $(CCFLAGS) -MMD -o $@ $< 
+
+# automagic dependency management: `gcc -MMD` generates all the .d files for us
+-include build/*.d
+build/%.d:
+
+##########################################
+# generate the C++ implementation of our Lexer/Parser/Visitor
+generated/ifccLexer.cpp: generated/ifccParser.cpp
+generated/ifccVisitor.cpp: generated/ifccParser.cpp
+generated/ifccBaseVisitor.cpp: generated/ifccParser.cpp
+generated/ifccParser.cpp: ifcc.g4
+	@mkdir -p generated
+	$(ANTLR) -visitor -no-listener -Dlanguage=Cpp -o generated ifcc.g4
+
+# prevent automatic cleanup of "intermediate" files like ifccLexer.cpp etc
+.PRECIOUS: generated/ifcc%.cpp   
+
+##########################################
+# view the parse tree in a graphical window
+
+# Usage: `make gui FILE=path/to/your/file.c`
+FILE ?= ../tests/testfiles/1_return42.c
+
+gui:
+	@mkdir -p generated build
+	$(ANTLR) -Dlanguage=Java -o generated ifcc.g4
+	javac -cp $(ANTLRJAR) -d build generated/*.java
+	java -cp $(ANTLRJAR):build org.antlr.v4.gui.TestRig ifcc axiom -gui $(FILE)
+
+##########################################
+# delete all machine-generated files
+clean:
+	rm -rf build generated
+	rm -f ifcc

compiler/README.md

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+# C compiler with antlr4/c++
+
+## Instructions
+
+This minimal example shows how to build a basic C compiler using
+Antlr4 for C++. The only file the compiler can deal with is:
+
+```
+int main() {
+   return N;
+}
+```
+where `N` is a positive integer constant. 
+
+## Source Files
+- `ifcc.g4` contains the grammar in antlr4 format
+- `main.cpp` contains the C++ code to call the antlr4-generated parser
+  on the file name provided in the command line.
+- `CodeGenVisitor.h` produces the actual assembly-language output
+
+## Prerequisites
+  Before building your  compiler, you should install  antlr using your
+  distribution's  package manager,  or by  running the  provided shell
+  script:   `install-antlr.sh`. 
+    
+## Compilation scripts
+- `Makefile` contains  the actual build  logic. Please read  this file
+  and ask questions on parts you do not understand.
+  The  Makefile includes a .mk file that defines several variables 
+  (ANTLR, ANTLRJAR,  ANTLRINC and  ANTLRLIB) indicating the location 
+  of various parts of the Antlr suite. 
+  You can (should)  change  those values to suit your installation, either
+  by editing the  Makefile and/or adding another .mk file.
+

compiler/config.mk

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+# the ANTLRJAR part below is copied from /usr/bin/antlr4
+ANTLRJAR=/usr/share/java/stringtemplate4.jar:/usr/share/java/antlr4.jar:/usr/share/java/antlr4-runtime.jar:/usr/share/java/antlr3-runtime.jar/:/usr/share/java/treelayout.jar
+ANTLRINC=/usr/include/antlr4-runtime
+ANTLRLIB=/usr/lib/x86_64-linux-gnu/libantlr4-runtime.a
+ANTLR=antlr4

compiler/generated/ifcc.interp

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+token literal names:
+null
+'int'
+'main'
+'('
+')'
+'{'
+'}'
+';'
+'return'
+null
+null
+null
+null
+
+token symbolic names:
+null
+null
+null
+null
+null
+null
+null
+null
+RETURN
+CONST
+COMMENT
+DIRECTIVE
+WS
+
+rule names:
+axiom
+prog
+return_stmt
+
+
+atn:
+[3, 24715, 42794, 33075, 47597, 16764, 15335, 30598, 22884, 3, 14, 24, 4, 2, 9, 2, 4, 3, 9, 3, 4, 4, 9, 4, 3, 2, 3, 2, 3, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 2, 2, 5, 2, 4, 6, 2, 2, 2, 20, 2, 8, 3, 2, 2, 2, 4, 11, 3, 2, 2, 2, 6, 19, 3, 2, 2, 2, 8, 9, 5, 4, 3, 2, 9, 10, 7, 2, 2, 3, 10, 3, 3, 2, 2, 2, 11, 12, 7, 3, 2, 2, 12, 13, 7, 4, 2, 2, 13, 14, 7, 5, 2, 2, 14, 15, 7, 6, 2, 2, 15, 16, 7, 7, 2, 2, 16, 17, 5, 6, 4, 2, 17, 18, 7, 8, 2, 2, 18, 5, 3, 2, 2, 2, 19, 20, 7, 10, 2, 2, 20, 21, 7, 11, 2, 2, 21, 22, 7, 9, 2, 2, 22, 7, 3, 2, 2, 2, 2]

compiler/generated/ifcc.tokens

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+T__0=1
+T__1=2
+T__2=3
+T__3=4
+T__4=5
+T__5=6
+T__6=7
+RETURN=8
+CONST=9
+COMMENT=10
+DIRECTIVE=11
+WS=12
+'int'=1
+'main'=2
+'('=3
+')'=4
+'{'=5
+'}'=6
+';'=7
+'return'=8

compiler/generated/ifccBaseVisitor.cpp

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+
+// Generated from ifcc.g4 by ANTLR 4.7.2
+
+
+#include "ifccBaseVisitor.h"
+
+

compiler/generated/ifccBaseVisitor.h

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+
+// Generated from ifcc.g4 by ANTLR 4.7.2
+
+#pragma once
+
+
+#include "antlr4-runtime.h"
+#include "ifccVisitor.h"
+
+
+/**
+ * This class provides an empty implementation of ifccVisitor, which can be
+ * extended to create a visitor which only needs to handle a subset of the available methods.
+ */
+class  ifccBaseVisitor : public ifccVisitor {
+public:
+
+  virtual antlrcpp::Any visitAxiom(ifccParser::AxiomContext *ctx) override {
+    return visitChildren(ctx);
+  }
+
+  virtual antlrcpp::Any visitProg(ifccParser::ProgContext *ctx) override {
+    return visitChildren(ctx);
+  }
+
+  virtual antlrcpp::Any visitReturn_stmt(ifccParser::Return_stmtContext *ctx) override {
+    return visitChildren(ctx);
+  }
+
+
+};
+