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@@ -0,0 +1,1230 @@
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+#include "llvm/ADT/STLExtras.h"
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+#include "llvm/Analysis/Passes.h"
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+#include "llvm/IR/IRBuilder.h"
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+#include "llvm/IR/LLVMContext.h"
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+#include "llvm/IR/LegacyPassManager.h"
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+#include "llvm/IR/Module.h"
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+#include "llvm/IR/Verifier.h"
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+#include "llvm/Support/TargetSelect.h"
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+#include "llvm/Transforms/Scalar.h"
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+#include <cctype>
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+#include <cstdio>
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+#include <map>
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+#include <string>
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+#include <vector>
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+#include "../KaleidoscopeJIT.h"
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+
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+using namespace llvm;
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+using namespace llvm::orc;
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+
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+//===----------------------------------------------------------------------===//
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+// Lexer
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+//===----------------------------------------------------------------------===//
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+
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+// The lexer returns tokens [0-255] if it is an unknown character, otherwise one
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+// of these for known things.
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+enum Token {
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+ tok_eof = -1,
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+
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+ // commands
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+ tok_def = -2,
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+ tok_extern = -3,
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+
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+ // primary
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+ tok_identifier = -4,
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+ tok_number = -5,
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+
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+ // control
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+ tok_if = -6,
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+ tok_then = -7,
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+ tok_else = -8,
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+ tok_for = -9,
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+ tok_in = -10,
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+
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+ // operators
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+ tok_binary = -11,
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+ tok_unary = -12,
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+
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+ // var definition
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+ tok_var = -13
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+};
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+
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+static std::string IdentifierStr; // Filled in if tok_identifier
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+static double NumVal; // Filled in if tok_number
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+
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+/// gettok - Return the next token from standard input.
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+static int gettok() {
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+ static int LastChar = ' ';
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+
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+ // Skip any whitespace.
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+ while (isspace(LastChar))
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+ LastChar = getchar();
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+
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+ if (isalpha(LastChar)) { // identifier: [a-zA-Z][a-zA-Z0-9]*
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+ IdentifierStr = LastChar;
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+ while (isalnum((LastChar = getchar())))
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+ IdentifierStr += LastChar;
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+
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+ if (IdentifierStr == "def")
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+ return tok_def;
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+ if (IdentifierStr == "extern")
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+ return tok_extern;
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+ if (IdentifierStr == "if")
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+ return tok_if;
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+ if (IdentifierStr == "then")
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+ return tok_then;
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+ if (IdentifierStr == "else")
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+ return tok_else;
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+ if (IdentifierStr == "for")
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+ return tok_for;
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+ if (IdentifierStr == "in")
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+ return tok_in;
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+ if (IdentifierStr == "binary")
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+ return tok_binary;
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+ if (IdentifierStr == "unary")
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+ return tok_unary;
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+ if (IdentifierStr == "var")
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+ return tok_var;
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+ return tok_identifier;
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+ }
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+
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+ if (isdigit(LastChar) || LastChar == '.') { // Number: [0-9.]+
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+ std::string NumStr;
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+ do {
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+ NumStr += LastChar;
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+ LastChar = getchar();
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+ } while (isdigit(LastChar) || LastChar == '.');
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+
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+ NumVal = strtod(NumStr.c_str(), nullptr);
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+ return tok_number;
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+ }
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+
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+ if (LastChar == '#') {
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+ // Comment until end of line.
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+ do
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+ LastChar = getchar();
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+ while (LastChar != EOF && LastChar != '\n' && LastChar != '\r');
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+
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+ if (LastChar != EOF)
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+ return gettok();
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+ }
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+
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+ // Check for end of file. Don't eat the EOF.
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+ if (LastChar == EOF)
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+ return tok_eof;
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+
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+ // Otherwise, just return the character as its ascii value.
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+ int ThisChar = LastChar;
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+ LastChar = getchar();
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+ return ThisChar;
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+}
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+
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+//===----------------------------------------------------------------------===//
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+// Abstract Syntax Tree (aka Parse Tree)
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+//===----------------------------------------------------------------------===//
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+namespace {
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+/// ExprAST - Base class for all expression nodes.
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+class ExprAST {
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+public:
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+ virtual ~ExprAST() {}
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+ virtual Value *codegen() = 0;
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+};
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+
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+/// NumberExprAST - Expression class for numeric literals like "1.0".
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+class NumberExprAST : public ExprAST {
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+ double Val;
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+
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+public:
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+ NumberExprAST(double Val) : Val(Val) {}
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+ Value *codegen() override;
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+};
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+
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+/// VariableExprAST - Expression class for referencing a variable, like "a".
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+class VariableExprAST : public ExprAST {
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+ std::string Name;
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+
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+public:
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+ VariableExprAST(const std::string &Name) : Name(Name) {}
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+ const std::string &getName() const { return Name; }
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+ Value *codegen() override;
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+};
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+
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+/// UnaryExprAST - Expression class for a unary operator.
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+class UnaryExprAST : public ExprAST {
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+ char Opcode;
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+ std::unique_ptr<ExprAST> Operand;
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+
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+public:
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+ UnaryExprAST(char Opcode, std::unique_ptr<ExprAST> Operand)
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+ : Opcode(Opcode), Operand(std::move(Operand)) {}
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+ Value *codegen() override;
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+};
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+
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+/// BinaryExprAST - Expression class for a binary operator.
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+class BinaryExprAST : public ExprAST {
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+ char Op;
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+ std::unique_ptr<ExprAST> LHS, RHS;
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+
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+public:
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+ BinaryExprAST(char Op, std::unique_ptr<ExprAST> LHS,
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+ std::unique_ptr<ExprAST> RHS)
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+ : Op(Op), LHS(std::move(LHS)), RHS(std::move(RHS)) {}
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+ Value *codegen() override;
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+};
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+
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+/// CallExprAST - Expression class for function calls.
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+class CallExprAST : public ExprAST {
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+ std::string Callee;
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+ std::vector<std::unique_ptr<ExprAST>> Args;
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+
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+public:
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+ CallExprAST(const std::string &Callee,
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+ std::vector<std::unique_ptr<ExprAST>> Args)
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+ : Callee(Callee), Args(std::move(Args)) {}
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+ Value *codegen() override;
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+};
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+
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+/// IfExprAST - Expression class for if/then/else.
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+class IfExprAST : public ExprAST {
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+ std::unique_ptr<ExprAST> Cond, Then, Else;
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+
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+public:
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+ IfExprAST(std::unique_ptr<ExprAST> Cond, std::unique_ptr<ExprAST> Then,
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+ std::unique_ptr<ExprAST> Else)
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+ : Cond(std::move(Cond)), Then(std::move(Then)), Else(std::move(Else)) {}
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+ Value *codegen() override;
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+};
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+
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+/// ForExprAST - Expression class for for/in.
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+class ForExprAST : public ExprAST {
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+ std::string VarName;
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+ std::unique_ptr<ExprAST> Start, End, Step, Body;
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+
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+public:
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+ ForExprAST(const std::string &VarName, std::unique_ptr<ExprAST> Start,
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+ std::unique_ptr<ExprAST> End, std::unique_ptr<ExprAST> Step,
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+ std::unique_ptr<ExprAST> Body)
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+ : VarName(VarName), Start(std::move(Start)), End(std::move(End)),
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+ Step(std::move(Step)), Body(std::move(Body)) {}
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+ Value *codegen() override;
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+};
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+
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+/// VarExprAST - Expression class for var/in
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+class VarExprAST : public ExprAST {
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+ std::vector<std::pair<std::string, std::unique_ptr<ExprAST>>> VarNames;
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+ std::unique_ptr<ExprAST> Body;
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+
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+public:
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+ VarExprAST(
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+ std::vector<std::pair<std::string, std::unique_ptr<ExprAST>>> VarNames,
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+ std::unique_ptr<ExprAST> Body)
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+ : VarNames(std::move(VarNames)), Body(std::move(Body)) {}
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+ Value *codegen() override;
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+};
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+
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+/// PrototypeAST - This class represents the "prototype" for a function,
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+/// which captures its name, and its argument names (thus implicitly the number
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+/// of arguments the function takes), as well as if it is an operator.
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+class PrototypeAST {
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+ std::string Name;
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+ std::vector<std::string> Args;
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+ bool IsOperator;
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+ unsigned Precedence; // Precedence if a binary op.
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+
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+public:
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+ PrototypeAST(const std::string &Name, std::vector<std::string> Args,
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+ bool IsOperator = false, unsigned Prec = 0)
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+ : Name(Name), Args(std::move(Args)), IsOperator(IsOperator),
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+ Precedence(Prec) {}
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+ Function *codegen();
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+ const std::string &getName() const { return Name; }
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+
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+ bool isUnaryOp() const { return IsOperator && Args.size() == 1; }
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+ bool isBinaryOp() const { return IsOperator && Args.size() == 2; }
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+
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+ char getOperatorName() const {
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+ assert(isUnaryOp() || isBinaryOp());
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+ return Name[Name.size() - 1];
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+ }
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+
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+ unsigned getBinaryPrecedence() const { return Precedence; }
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+};
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+
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+/// FunctionAST - This class represents a function definition itself.
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+class FunctionAST {
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+ std::unique_ptr<PrototypeAST> Proto;
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+ std::unique_ptr<ExprAST> Body;
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+
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+public:
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+ FunctionAST(std::unique_ptr<PrototypeAST> Proto,
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+ std::unique_ptr<ExprAST> Body)
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+ : Proto(std::move(Proto)), Body(std::move(Body)) {}
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+ Function *codegen();
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+};
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+} // end anonymous namespace
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+
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+//===----------------------------------------------------------------------===//
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+// Parser
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+//===----------------------------------------------------------------------===//
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+
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+/// CurTok/getNextToken - Provide a simple token buffer. CurTok is the current
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+/// token the parser is looking at. getNextToken reads another token from the
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+/// lexer and updates CurTok with its results.
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+static int CurTok;
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+static int getNextToken() { return CurTok = gettok(); }
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+
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+/// BinopPrecedence - This holds the precedence for each binary operator that is
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+/// defined.
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+static std::map<char, int> BinopPrecedence;
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+
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+/// GetTokPrecedence - Get the precedence of the pending binary operator token.
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+static int GetTokPrecedence() {
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+ if (!isascii(CurTok))
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+ return -1;
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+
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+ // Make sure it's a declared binop.
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+ int TokPrec = BinopPrecedence[CurTok];
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+ if (TokPrec <= 0)
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+ return -1;
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+ return TokPrec;
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+}
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+
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+/// Error* - These are little helper functions for error handling.
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+std::unique_ptr<ExprAST> Error(const char *Str) {
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+ fprintf(stderr, "Error: %s\n", Str);
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+ return nullptr;
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+}
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+
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+std::unique_ptr<PrototypeAST> ErrorP(const char *Str) {
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+ Error(Str);
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+ return nullptr;
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+}
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+
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+static std::unique_ptr<ExprAST> ParseExpression();
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+
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+/// numberexpr ::= number
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+static std::unique_ptr<ExprAST> ParseNumberExpr() {
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+ auto Result = llvm::make_unique<NumberExprAST>(NumVal);
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+ getNextToken(); // consume the number
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+ return std::move(Result);
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+}
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+
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+/// parenexpr ::= '(' expression ')'
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+static std::unique_ptr<ExprAST> ParseParenExpr() {
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+ getNextToken(); // eat (.
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+ auto V = ParseExpression();
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+ if (!V)
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+ return nullptr;
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+
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+ if (CurTok != ')')
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+ return Error("expected ')'");
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+ getNextToken(); // eat ).
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+ return V;
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+}
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+
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+/// identifierexpr
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+/// ::= identifier
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+/// ::= identifier '(' expression* ')'
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+static std::unique_ptr<ExprAST> ParseIdentifierExpr() {
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+ std::string IdName = IdentifierStr;
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+
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+ getNextToken(); // eat identifier.
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+
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+ if (CurTok != '(') // Simple variable ref.
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+ return llvm::make_unique<VariableExprAST>(IdName);
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+
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+ // Call.
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+ getNextToken(); // eat (
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+ std::vector<std::unique_ptr<ExprAST>> Args;
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+ if (CurTok != ')') {
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+ while (1) {
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+ if (auto Arg = ParseExpression())
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+ Args.push_back(std::move(Arg));
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+ else
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+ return nullptr;
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+
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+ if (CurTok == ')')
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+ break;
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+
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+ if (CurTok != ',')
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+ return Error("Expected ')' or ',' in argument list");
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+ getNextToken();
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+ }
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+ }
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+
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+ // Eat the ')'.
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+ getNextToken();
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+
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+ return llvm::make_unique<CallExprAST>(IdName, std::move(Args));
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+}
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+
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+/// ifexpr ::= 'if' expression 'then' expression 'else' expression
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+static std::unique_ptr<ExprAST> ParseIfExpr() {
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+ getNextToken(); // eat the if.
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+
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+ // condition.
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+ auto Cond = ParseExpression();
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+ if (!Cond)
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+ return nullptr;
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+
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+ if (CurTok != tok_then)
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+ return Error("expected then");
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+ getNextToken(); // eat the then
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+
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+ auto Then = ParseExpression();
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+ if (!Then)
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+ return nullptr;
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+
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+ if (CurTok != tok_else)
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+ return Error("expected else");
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+
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+ getNextToken();
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+
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+ auto Else = ParseExpression();
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+ if (!Else)
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+ return nullptr;
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+
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+ return llvm::make_unique<IfExprAST>(std::move(Cond), std::move(Then),
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+ std::move(Else));
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+}
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+
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+/// forexpr ::= 'for' identifier '=' expr ',' expr (',' expr)? 'in' expression
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+static std::unique_ptr<ExprAST> ParseForExpr() {
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+ getNextToken(); // eat the for.
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+
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+ if (CurTok != tok_identifier)
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+ return Error("expected identifier after for");
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+
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+ std::string IdName = IdentifierStr;
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+ getNextToken(); // eat identifier.
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+
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+ if (CurTok != '=')
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+ return Error("expected '=' after for");
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+ getNextToken(); // eat '='.
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+
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+ auto Start = ParseExpression();
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+ if (!Start)
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+ return nullptr;
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+ if (CurTok != ',')
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+ return Error("expected ',' after for start value");
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+ getNextToken();
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+
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+ auto End = ParseExpression();
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+ if (!End)
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+ return nullptr;
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+
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+ // The step value is optional.
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+ std::unique_ptr<ExprAST> Step;
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+ if (CurTok == ',') {
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+ getNextToken();
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+ Step = ParseExpression();
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+ if (!Step)
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+ return nullptr;
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+ }
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+
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+ if (CurTok != tok_in)
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+ return Error("expected 'in' after for");
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+ getNextToken(); // eat 'in'.
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+
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+ auto Body = ParseExpression();
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+ if (!Body)
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|
|
+ return nullptr;
|
|
|
+
|
|
|
+ return llvm::make_unique<ForExprAST>(IdName, std::move(Start), std::move(End),
|
|
|
+ std::move(Step), std::move(Body));
|
|
|
+}
|
|
|
+
|
|
|
+/// varexpr ::= 'var' identifier ('=' expression)?
|
|
|
+// (',' identifier ('=' expression)?)* 'in' expression
|
|
|
+static std::unique_ptr<ExprAST> ParseVarExpr() {
|
|
|
+ getNextToken(); // eat the var.
|
|
|
+
|
|
|
+ std::vector<std::pair<std::string, std::unique_ptr<ExprAST>>> VarNames;
|
|
|
+
|
|
|
+ // At least one variable name is required.
|
|
|
+ if (CurTok != tok_identifier)
|
|
|
+ return Error("expected identifier after var");
|
|
|
+
|
|
|
+ while (1) {
|
|
|
+ std::string Name = IdentifierStr;
|
|
|
+ getNextToken(); // eat identifier.
|
|
|
+
|
|
|
+ // Read the optional initializer.
|
|
|
+ std::unique_ptr<ExprAST> Init = nullptr;
|
|
|
+ if (CurTok == '=') {
|
|
|
+ getNextToken(); // eat the '='.
|
|
|
+
|
|
|
+ Init = ParseExpression();
|
|
|
+ if (!Init)
|
|
|
+ return nullptr;
|
|
|
+ }
|
|
|
+
|
|
|
+ VarNames.push_back(std::make_pair(Name, std::move(Init)));
|
|
|
+
|
|
|
+ // End of var list, exit loop.
|
|
|
+ if (CurTok != ',')
|
|
|
+ break;
|
|
|
+ getNextToken(); // eat the ','.
|
|
|
+
|
|
|
+ if (CurTok != tok_identifier)
|
|
|
+ return Error("expected identifier list after var");
|
|
|
+ }
|
|
|
+
|
|
|
+ // At this point, we have to have 'in'.
|
|
|
+ if (CurTok != tok_in)
|
|
|
+ return Error("expected 'in' keyword after 'var'");
|
|
|
+ getNextToken(); // eat 'in'.
|
|
|
+
|
|
|
+ auto Body = ParseExpression();
|
|
|
+ if (!Body)
|
|
|
+ return nullptr;
|
|
|
+
|
|
|
+ return llvm::make_unique<VarExprAST>(std::move(VarNames), std::move(Body));
|
|
|
+}
|
|
|
+
|
|
|
+/// primary
|
|
|
+/// ::= identifierexpr
|
|
|
+/// ::= numberexpr
|
|
|
+/// ::= parenexpr
|
|
|
+/// ::= ifexpr
|
|
|
+/// ::= forexpr
|
|
|
+/// ::= varexpr
|
|
|
+static std::unique_ptr<ExprAST> ParsePrimary() {
|
|
|
+ switch (CurTok) {
|
|
|
+ default:
|
|
|
+ return Error("unknown token when expecting an expression");
|
|
|
+ case tok_identifier:
|
|
|
+ return ParseIdentifierExpr();
|
|
|
+ case tok_number:
|
|
|
+ return ParseNumberExpr();
|
|
|
+ case '(':
|
|
|
+ return ParseParenExpr();
|
|
|
+ case tok_if:
|
|
|
+ return ParseIfExpr();
|
|
|
+ case tok_for:
|
|
|
+ return ParseForExpr();
|
|
|
+ case tok_var:
|
|
|
+ return ParseVarExpr();
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+/// unary
|
|
|
+/// ::= primary
|
|
|
+/// ::= '!' unary
|
|
|
+static std::unique_ptr<ExprAST> ParseUnary() {
|
|
|
+ // If the current token is not an operator, it must be a primary expr.
|
|
|
+ if (!isascii(CurTok) || CurTok == '(' || CurTok == ',')
|
|
|
+ return ParsePrimary();
|
|
|
+
|
|
|
+ // If this is a unary operator, read it.
|
|
|
+ int Opc = CurTok;
|
|
|
+ getNextToken();
|
|
|
+ if (auto Operand = ParseUnary())
|
|
|
+ return llvm::make_unique<UnaryExprAST>(Opc, std::move(Operand));
|
|
|
+ return nullptr;
|
|
|
+}
|
|
|
+
|
|
|
+/// binoprhs
|
|
|
+/// ::= ('+' unary)*
|
|
|
+static std::unique_ptr<ExprAST> ParseBinOpRHS(int ExprPrec,
|
|
|
+ std::unique_ptr<ExprAST> LHS) {
|
|
|
+ // If this is a binop, find its precedence.
|
|
|
+ while (1) {
|
|
|
+ int TokPrec = GetTokPrecedence();
|
|
|
+
|
|
|
+ // If this is a binop that binds at least as tightly as the current binop,
|
|
|
+ // consume it, otherwise we are done.
|
|
|
+ if (TokPrec < ExprPrec)
|
|
|
+ return LHS;
|
|
|
+
|
|
|
+ // Okay, we know this is a binop.
|
|
|
+ int BinOp = CurTok;
|
|
|
+ getNextToken(); // eat binop
|
|
|
+
|
|
|
+ // Parse the unary expression after the binary operator.
|
|
|
+ auto RHS = ParseUnary();
|
|
|
+ if (!RHS)
|
|
|
+ return nullptr;
|
|
|
+
|
|
|
+ // If BinOp binds less tightly with RHS than the operator after RHS, let
|
|
|
+ // the pending operator take RHS as its LHS.
|
|
|
+ int NextPrec = GetTokPrecedence();
|
|
|
+ if (TokPrec < NextPrec) {
|
|
|
+ RHS = ParseBinOpRHS(TokPrec + 1, std::move(RHS));
|
|
|
+ if (!RHS)
|
|
|
+ return nullptr;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Merge LHS/RHS.
|
|
|
+ LHS =
|
|
|
+ llvm::make_unique<BinaryExprAST>(BinOp, std::move(LHS), std::move(RHS));
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+/// expression
|
|
|
+/// ::= unary binoprhs
|
|
|
+///
|
|
|
+static std::unique_ptr<ExprAST> ParseExpression() {
|
|
|
+ auto LHS = ParseUnary();
|
|
|
+ if (!LHS)
|
|
|
+ return nullptr;
|
|
|
+
|
|
|
+ return ParseBinOpRHS(0, std::move(LHS));
|
|
|
+}
|
|
|
+
|
|
|
+/// prototype
|
|
|
+/// ::= id '(' id* ')'
|
|
|
+/// ::= binary LETTER number? (id, id)
|
|
|
+/// ::= unary LETTER (id)
|
|
|
+static std::unique_ptr<PrototypeAST> ParsePrototype() {
|
|
|
+ std::string FnName;
|
|
|
+
|
|
|
+ unsigned Kind = 0; // 0 = identifier, 1 = unary, 2 = binary.
|
|
|
+ unsigned BinaryPrecedence = 30;
|
|
|
+
|
|
|
+ switch (CurTok) {
|
|
|
+ default:
|
|
|
+ return ErrorP("Expected function name in prototype");
|
|
|
+ case tok_identifier:
|
|
|
+ FnName = IdentifierStr;
|
|
|
+ Kind = 0;
|
|
|
+ getNextToken();
|
|
|
+ break;
|
|
|
+ case tok_unary:
|
|
|
+ getNextToken();
|
|
|
+ if (!isascii(CurTok))
|
|
|
+ return ErrorP("Expected unary operator");
|
|
|
+ FnName = "unary";
|
|
|
+ FnName += (char)CurTok;
|
|
|
+ Kind = 1;
|
|
|
+ getNextToken();
|
|
|
+ break;
|
|
|
+ case tok_binary:
|
|
|
+ getNextToken();
|
|
|
+ if (!isascii(CurTok))
|
|
|
+ return ErrorP("Expected binary operator");
|
|
|
+ FnName = "binary";
|
|
|
+ FnName += (char)CurTok;
|
|
|
+ Kind = 2;
|
|
|
+ getNextToken();
|
|
|
+
|
|
|
+ // Read the precedence if present.
|
|
|
+ if (CurTok == tok_number) {
|
|
|
+ if (NumVal < 1 || NumVal > 100)
|
|
|
+ return ErrorP("Invalid precedecnce: must be 1..100");
|
|
|
+ BinaryPrecedence = (unsigned)NumVal;
|
|
|
+ getNextToken();
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (CurTok != '(')
|
|
|
+ return ErrorP("Expected '(' in prototype");
|
|
|
+
|
|
|
+ std::vector<std::string> ArgNames;
|
|
|
+ while (getNextToken() == tok_identifier)
|
|
|
+ ArgNames.push_back(IdentifierStr);
|
|
|
+ if (CurTok != ')')
|
|
|
+ return ErrorP("Expected ')' in prototype");
|
|
|
+
|
|
|
+ // success.
|
|
|
+ getNextToken(); // eat ')'.
|
|
|
+
|
|
|
+ // Verify right number of names for operator.
|
|
|
+ if (Kind && ArgNames.size() != Kind)
|
|
|
+ return ErrorP("Invalid number of operands for operator");
|
|
|
+
|
|
|
+ return llvm::make_unique<PrototypeAST>(FnName, ArgNames, Kind != 0,
|
|
|
+ BinaryPrecedence);
|
|
|
+}
|
|
|
+
|
|
|
+/// definition ::= 'def' prototype expression
|
|
|
+static std::unique_ptr<FunctionAST> ParseDefinition() {
|
|
|
+ getNextToken(); // eat def.
|
|
|
+ auto Proto = ParsePrototype();
|
|
|
+ if (!Proto)
|
|
|
+ return nullptr;
|
|
|
+
|
|
|
+ if (auto E = ParseExpression())
|
|
|
+ return llvm::make_unique<FunctionAST>(std::move(Proto), std::move(E));
|
|
|
+ return nullptr;
|
|
|
+}
|
|
|
+
|
|
|
+/// toplevelexpr ::= expression
|
|
|
+static std::unique_ptr<FunctionAST> ParseTopLevelExpr() {
|
|
|
+ if (auto E = ParseExpression()) {
|
|
|
+ // Make an anonymous proto.
|
|
|
+ auto Proto = llvm::make_unique<PrototypeAST>("__anon_expr",
|
|
|
+ std::vector<std::string>());
|
|
|
+ return llvm::make_unique<FunctionAST>(std::move(Proto), std::move(E));
|
|
|
+ }
|
|
|
+ return nullptr;
|
|
|
+}
|
|
|
+
|
|
|
+/// external ::= 'extern' prototype
|
|
|
+static std::unique_ptr<PrototypeAST> ParseExtern() {
|
|
|
+ getNextToken(); // eat extern.
|
|
|
+ return ParsePrototype();
|
|
|
+}
|
|
|
+
|
|
|
+//===----------------------------------------------------------------------===//
|
|
|
+// Code Generation
|
|
|
+//===----------------------------------------------------------------------===//
|
|
|
+
|
|
|
+static std::unique_ptr<Module> TheModule;
|
|
|
+static IRBuilder<> Builder(getGlobalContext());
|
|
|
+static std::map<std::string, AllocaInst *> NamedValues;
|
|
|
+static std::unique_ptr<legacy::FunctionPassManager> TheFPM;
|
|
|
+static std::unique_ptr<KaleidoscopeJIT> TheJIT;
|
|
|
+static std::map<std::string, std::unique_ptr<PrototypeAST>> FunctionProtos;
|
|
|
+
|
|
|
+Value *ErrorV(const char *Str) {
|
|
|
+ Error(Str);
|
|
|
+ return nullptr;
|
|
|
+}
|
|
|
+
|
|
|
+Function *getFunction(std::string Name) {
|
|
|
+ // First, see if the function has already been added to the current module.
|
|
|
+ if (auto *F = TheModule->getFunction(Name))
|
|
|
+ return F;
|
|
|
+
|
|
|
+ // If not, check whether we can codegen the declaration from some existing
|
|
|
+ // prototype.
|
|
|
+ auto FI = FunctionProtos.find(Name);
|
|
|
+ if (FI != FunctionProtos.end())
|
|
|
+ return FI->second->codegen();
|
|
|
+
|
|
|
+ // If no existing prototype exists, return null.
|
|
|
+ return nullptr;
|
|
|
+}
|
|
|
+
|
|
|
+/// CreateEntryBlockAlloca - Create an alloca instruction in the entry block of
|
|
|
+/// the function. This is used for mutable variables etc.
|
|
|
+static AllocaInst *CreateEntryBlockAlloca(Function *TheFunction,
|
|
|
+ const std::string &VarName) {
|
|
|
+ IRBuilder<> TmpB(&TheFunction->getEntryBlock(),
|
|
|
+ TheFunction->getEntryBlock().begin());
|
|
|
+ return TmpB.CreateAlloca(Type::getDoubleTy(getGlobalContext()), nullptr,
|
|
|
+ VarName.c_str());
|
|
|
+}
|
|
|
+
|
|
|
+Value *NumberExprAST::codegen() {
|
|
|
+ return ConstantFP::get(getGlobalContext(), APFloat(Val));
|
|
|
+}
|
|
|
+
|
|
|
+Value *VariableExprAST::codegen() {
|
|
|
+ // Look this variable up in the function.
|
|
|
+ Value *V = NamedValues[Name];
|
|
|
+ if (!V)
|
|
|
+ return ErrorV("Unknown variable name");
|
|
|
+
|
|
|
+ // Load the value.
|
|
|
+ return Builder.CreateLoad(V, Name.c_str());
|
|
|
+}
|
|
|
+
|
|
|
+Value *UnaryExprAST::codegen() {
|
|
|
+ Value *OperandV = Operand->codegen();
|
|
|
+ if (!OperandV)
|
|
|
+ return nullptr;
|
|
|
+
|
|
|
+ Function *F = getFunction(std::string("unary") + Opcode);
|
|
|
+ if (!F)
|
|
|
+ return ErrorV("Unknown unary operator");
|
|
|
+
|
|
|
+ return Builder.CreateCall(F, OperandV, "unop");
|
|
|
+}
|
|
|
+
|
|
|
+Value *BinaryExprAST::codegen() {
|
|
|
+ // Special case '=' because we don't want to emit the LHS as an expression.
|
|
|
+ if (Op == '=') {
|
|
|
+ // Assignment requires the LHS to be an identifier.
|
|
|
+ // This assume we're building without RTTI because LLVM builds that way by
|
|
|
+ // default. If you build LLVM with RTTI this can be changed to a
|
|
|
+ // dynamic_cast for automatic error checking.
|
|
|
+ VariableExprAST *LHSE = static_cast<VariableExprAST *>(LHS.get());
|
|
|
+ if (!LHSE)
|
|
|
+ return ErrorV("destination of '=' must be a variable");
|
|
|
+ // Codegen the RHS.
|
|
|
+ Value *Val = RHS->codegen();
|
|
|
+ if (!Val)
|
|
|
+ return nullptr;
|
|
|
+
|
|
|
+ // Look up the name.
|
|
|
+ Value *Variable = NamedValues[LHSE->getName()];
|
|
|
+ if (!Variable)
|
|
|
+ return ErrorV("Unknown variable name");
|
|
|
+
|
|
|
+ Builder.CreateStore(Val, Variable);
|
|
|
+ return Val;
|
|
|
+ }
|
|
|
+
|
|
|
+ Value *L = LHS->codegen();
|
|
|
+ Value *R = RHS->codegen();
|
|
|
+ if (!L || !R)
|
|
|
+ return nullptr;
|
|
|
+
|
|
|
+ switch (Op) {
|
|
|
+ case '+':
|
|
|
+ return Builder.CreateFAdd(L, R, "addtmp");
|
|
|
+ case '-':
|
|
|
+ return Builder.CreateFSub(L, R, "subtmp");
|
|
|
+ case '*':
|
|
|
+ return Builder.CreateFMul(L, R, "multmp");
|
|
|
+ case '<':
|
|
|
+ L = Builder.CreateFCmpULT(L, R, "cmptmp");
|
|
|
+ // Convert bool 0/1 to double 0.0 or 1.0
|
|
|
+ return Builder.CreateUIToFP(L, Type::getDoubleTy(getGlobalContext()),
|
|
|
+ "booltmp");
|
|
|
+ default:
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ // If it wasn't a builtin binary operator, it must be a user defined one. Emit
|
|
|
+ // a call to it.
|
|
|
+ Function *F = getFunction(std::string("binary") + Op);
|
|
|
+ assert(F && "binary operator not found!");
|
|
|
+
|
|
|
+ Value *Ops[] = {L, R};
|
|
|
+ return Builder.CreateCall(F, Ops, "binop");
|
|
|
+}
|
|
|
+
|
|
|
+Value *CallExprAST::codegen() {
|
|
|
+ // Look up the name in the global module table.
|
|
|
+ Function *CalleeF = getFunction(Callee);
|
|
|
+ if (!CalleeF)
|
|
|
+ return ErrorV("Unknown function referenced");
|
|
|
+
|
|
|
+ // If argument mismatch error.
|
|
|
+ if (CalleeF->arg_size() != Args.size())
|
|
|
+ return ErrorV("Incorrect # arguments passed");
|
|
|
+
|
|
|
+ std::vector<Value *> ArgsV;
|
|
|
+ for (unsigned i = 0, e = Args.size(); i != e; ++i) {
|
|
|
+ ArgsV.push_back(Args[i]->codegen());
|
|
|
+ if (!ArgsV.back())
|
|
|
+ return nullptr;
|
|
|
+ }
|
|
|
+
|
|
|
+ return Builder.CreateCall(CalleeF, ArgsV, "calltmp");
|
|
|
+}
|
|
|
+
|
|
|
+Value *IfExprAST::codegen() {
|
|
|
+ Value *CondV = Cond->codegen();
|
|
|
+ if (!CondV)
|
|
|
+ return nullptr;
|
|
|
+
|
|
|
+ // Convert condition to a bool by comparing equal to 0.0.
|
|
|
+ CondV = Builder.CreateFCmpONE(
|
|
|
+ CondV, ConstantFP::get(getGlobalContext(), APFloat(0.0)), "ifcond");
|
|
|
+
|
|
|
+ Function *TheFunction = Builder.GetInsertBlock()->getParent();
|
|
|
+
|
|
|
+ // Create blocks for the then and else cases. Insert the 'then' block at the
|
|
|
+ // end of the function.
|
|
|
+ BasicBlock *ThenBB =
|
|
|
+ BasicBlock::Create(getGlobalContext(), "then", TheFunction);
|
|
|
+ BasicBlock *ElseBB = BasicBlock::Create(getGlobalContext(), "else");
|
|
|
+ BasicBlock *MergeBB = BasicBlock::Create(getGlobalContext(), "ifcont");
|
|
|
+
|
|
|
+ Builder.CreateCondBr(CondV, ThenBB, ElseBB);
|
|
|
+
|
|
|
+ // Emit then value.
|
|
|
+ Builder.SetInsertPoint(ThenBB);
|
|
|
+
|
|
|
+ Value *ThenV = Then->codegen();
|
|
|
+ if (!ThenV)
|
|
|
+ return nullptr;
|
|
|
+
|
|
|
+ Builder.CreateBr(MergeBB);
|
|
|
+ // Codegen of 'Then' can change the current block, update ThenBB for the PHI.
|
|
|
+ ThenBB = Builder.GetInsertBlock();
|
|
|
+
|
|
|
+ // Emit else block.
|
|
|
+ TheFunction->getBasicBlockList().push_back(ElseBB);
|
|
|
+ Builder.SetInsertPoint(ElseBB);
|
|
|
+
|
|
|
+ Value *ElseV = Else->codegen();
|
|
|
+ if (!ElseV)
|
|
|
+ return nullptr;
|
|
|
+
|
|
|
+ Builder.CreateBr(MergeBB);
|
|
|
+ // Codegen of 'Else' can change the current block, update ElseBB for the PHI.
|
|
|
+ ElseBB = Builder.GetInsertBlock();
|
|
|
+
|
|
|
+ // Emit merge block.
|
|
|
+ TheFunction->getBasicBlockList().push_back(MergeBB);
|
|
|
+ Builder.SetInsertPoint(MergeBB);
|
|
|
+ PHINode *PN =
|
|
|
+ Builder.CreatePHI(Type::getDoubleTy(getGlobalContext()), 2, "iftmp");
|
|
|
+
|
|
|
+ PN->addIncoming(ThenV, ThenBB);
|
|
|
+ PN->addIncoming(ElseV, ElseBB);
|
|
|
+ return PN;
|
|
|
+}
|
|
|
+
|
|
|
+// Output for-loop as:
|
|
|
+// var = alloca double
|
|
|
+// ...
|
|
|
+// start = startexpr
|
|
|
+// store start -> var
|
|
|
+// goto loop
|
|
|
+// loop:
|
|
|
+// ...
|
|
|
+// bodyexpr
|
|
|
+// ...
|
|
|
+// loopend:
|
|
|
+// step = stepexpr
|
|
|
+// endcond = endexpr
|
|
|
+//
|
|
|
+// curvar = load var
|
|
|
+// nextvar = curvar + step
|
|
|
+// store nextvar -> var
|
|
|
+// br endcond, loop, endloop
|
|
|
+// outloop:
|
|
|
+Value *ForExprAST::codegen() {
|
|
|
+ Function *TheFunction = Builder.GetInsertBlock()->getParent();
|
|
|
+
|
|
|
+ // Create an alloca for the variable in the entry block.
|
|
|
+ AllocaInst *Alloca = CreateEntryBlockAlloca(TheFunction, VarName);
|
|
|
+
|
|
|
+ // Emit the start code first, without 'variable' in scope.
|
|
|
+ Value *StartVal = Start->codegen();
|
|
|
+ if (!StartVal)
|
|
|
+ return nullptr;
|
|
|
+
|
|
|
+ // Store the value into the alloca.
|
|
|
+ Builder.CreateStore(StartVal, Alloca);
|
|
|
+
|
|
|
+ // Make the new basic block for the loop header, inserting after current
|
|
|
+ // block.
|
|
|
+ BasicBlock *LoopBB =
|
|
|
+ BasicBlock::Create(getGlobalContext(), "loop", TheFunction);
|
|
|
+
|
|
|
+ // Insert an explicit fall through from the current block to the LoopBB.
|
|
|
+ Builder.CreateBr(LoopBB);
|
|
|
+
|
|
|
+ // Start insertion in LoopBB.
|
|
|
+ Builder.SetInsertPoint(LoopBB);
|
|
|
+
|
|
|
+ // Within the loop, the variable is defined equal to the PHI node. If it
|
|
|
+ // shadows an existing variable, we have to restore it, so save it now.
|
|
|
+ AllocaInst *OldVal = NamedValues[VarName];
|
|
|
+ NamedValues[VarName] = Alloca;
|
|
|
+
|
|
|
+ // Emit the body of the loop. This, like any other expr, can change the
|
|
|
+ // current BB. Note that we ignore the value computed by the body, but don't
|
|
|
+ // allow an error.
|
|
|
+ if (!Body->codegen())
|
|
|
+ return nullptr;
|
|
|
+
|
|
|
+ // Emit the step value.
|
|
|
+ Value *StepVal = nullptr;
|
|
|
+ if (Step) {
|
|
|
+ StepVal = Step->codegen();
|
|
|
+ if (!StepVal)
|
|
|
+ return nullptr;
|
|
|
+ } else {
|
|
|
+ // If not specified, use 1.0.
|
|
|
+ StepVal = ConstantFP::get(getGlobalContext(), APFloat(1.0));
|
|
|
+ }
|
|
|
+
|
|
|
+ // Compute the end condition.
|
|
|
+ Value *EndCond = End->codegen();
|
|
|
+ if (!EndCond)
|
|
|
+ return nullptr;
|
|
|
+
|
|
|
+ // Reload, increment, and restore the alloca. This handles the case where
|
|
|
+ // the body of the loop mutates the variable.
|
|
|
+ Value *CurVar = Builder.CreateLoad(Alloca, VarName.c_str());
|
|
|
+ Value *NextVar = Builder.CreateFAdd(CurVar, StepVal, "nextvar");
|
|
|
+ Builder.CreateStore(NextVar, Alloca);
|
|
|
+
|
|
|
+ // Convert condition to a bool by comparing equal to 0.0.
|
|
|
+ EndCond = Builder.CreateFCmpONE(
|
|
|
+ EndCond, ConstantFP::get(getGlobalContext(), APFloat(0.0)), "loopcond");
|
|
|
+
|
|
|
+ // Create the "after loop" block and insert it.
|
|
|
+ BasicBlock *AfterBB =
|
|
|
+ BasicBlock::Create(getGlobalContext(), "afterloop", TheFunction);
|
|
|
+
|
|
|
+ // Insert the conditional branch into the end of LoopEndBB.
|
|
|
+ Builder.CreateCondBr(EndCond, LoopBB, AfterBB);
|
|
|
+
|
|
|
+ // Any new code will be inserted in AfterBB.
|
|
|
+ Builder.SetInsertPoint(AfterBB);
|
|
|
+
|
|
|
+ // Restore the unshadowed variable.
|
|
|
+ if (OldVal)
|
|
|
+ NamedValues[VarName] = OldVal;
|
|
|
+ else
|
|
|
+ NamedValues.erase(VarName);
|
|
|
+
|
|
|
+ // for expr always returns 0.0.
|
|
|
+ return Constant::getNullValue(Type::getDoubleTy(getGlobalContext()));
|
|
|
+}
|
|
|
+
|
|
|
+Value *VarExprAST::codegen() {
|
|
|
+ std::vector<AllocaInst *> OldBindings;
|
|
|
+
|
|
|
+ Function *TheFunction = Builder.GetInsertBlock()->getParent();
|
|
|
+
|
|
|
+ // Register all variables and emit their initializer.
|
|
|
+ for (unsigned i = 0, e = VarNames.size(); i != e; ++i) {
|
|
|
+ const std::string &VarName = VarNames[i].first;
|
|
|
+ ExprAST *Init = VarNames[i].second.get();
|
|
|
+
|
|
|
+ // Emit the initializer before adding the variable to scope, this prevents
|
|
|
+ // the initializer from referencing the variable itself, and permits stuff
|
|
|
+ // like this:
|
|
|
+ // var a = 1 in
|
|
|
+ // var a = a in ... # refers to outer 'a'.
|
|
|
+ Value *InitVal;
|
|
|
+ if (Init) {
|
|
|
+ InitVal = Init->codegen();
|
|
|
+ if (!InitVal)
|
|
|
+ return nullptr;
|
|
|
+ } else { // If not specified, use 0.0.
|
|
|
+ InitVal = ConstantFP::get(getGlobalContext(), APFloat(0.0));
|
|
|
+ }
|
|
|
+
|
|
|
+ AllocaInst *Alloca = CreateEntryBlockAlloca(TheFunction, VarName);
|
|
|
+ Builder.CreateStore(InitVal, Alloca);
|
|
|
+
|
|
|
+ // Remember the old variable binding so that we can restore the binding when
|
|
|
+ // we unrecurse.
|
|
|
+ OldBindings.push_back(NamedValues[VarName]);
|
|
|
+
|
|
|
+ // Remember this binding.
|
|
|
+ NamedValues[VarName] = Alloca;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Codegen the body, now that all vars are in scope.
|
|
|
+ Value *BodyVal = Body->codegen();
|
|
|
+ if (!BodyVal)
|
|
|
+ return nullptr;
|
|
|
+
|
|
|
+ // Pop all our variables from scope.
|
|
|
+ for (unsigned i = 0, e = VarNames.size(); i != e; ++i)
|
|
|
+ NamedValues[VarNames[i].first] = OldBindings[i];
|
|
|
+
|
|
|
+ // Return the body computation.
|
|
|
+ return BodyVal;
|
|
|
+}
|
|
|
+
|
|
|
+Function *PrototypeAST::codegen() {
|
|
|
+ // Make the function type: double(double,double) etc.
|
|
|
+ std::vector<Type *> Doubles(Args.size(),
|
|
|
+ Type::getDoubleTy(getGlobalContext()));
|
|
|
+ FunctionType *FT =
|
|
|
+ FunctionType::get(Type::getDoubleTy(getGlobalContext()), Doubles, false);
|
|
|
+
|
|
|
+ Function *F =
|
|
|
+ Function::Create(FT, Function::ExternalLinkage, Name, TheModule.get());
|
|
|
+
|
|
|
+ // Set names for all arguments.
|
|
|
+ unsigned Idx = 0;
|
|
|
+ for (auto &Arg : F->args())
|
|
|
+ Arg.setName(Args[Idx++]);
|
|
|
+
|
|
|
+ return F;
|
|
|
+}
|
|
|
+
|
|
|
+Function *FunctionAST::codegen() {
|
|
|
+ // Transfer ownership of the prototype to the FunctionProtos map, but keep a
|
|
|
+ // reference to it for use below.
|
|
|
+ auto &P = *Proto;
|
|
|
+ FunctionProtos[Proto->getName()] = std::move(Proto);
|
|
|
+ Function *TheFunction = getFunction(P.getName());
|
|
|
+ if (!TheFunction)
|
|
|
+ return nullptr;
|
|
|
+
|
|
|
+ // If this is an operator, install it.
|
|
|
+ if (P.isBinaryOp())
|
|
|
+ BinopPrecedence[P.getOperatorName()] = P.getBinaryPrecedence();
|
|
|
+
|
|
|
+ // Create a new basic block to start insertion into.
|
|
|
+ BasicBlock *BB = BasicBlock::Create(getGlobalContext(), "entry", TheFunction);
|
|
|
+ Builder.SetInsertPoint(BB);
|
|
|
+
|
|
|
+ // Record the function arguments in the NamedValues map.
|
|
|
+ NamedValues.clear();
|
|
|
+ for (auto &Arg : TheFunction->args()) {
|
|
|
+ // Create an alloca for this variable.
|
|
|
+ AllocaInst *Alloca = CreateEntryBlockAlloca(TheFunction, Arg.getName());
|
|
|
+
|
|
|
+ // Store the initial value into the alloca.
|
|
|
+ Builder.CreateStore(&Arg, Alloca);
|
|
|
+
|
|
|
+ // Add arguments to variable symbol table.
|
|
|
+ NamedValues[Arg.getName()] = Alloca;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (Value *RetVal = Body->codegen()) {
|
|
|
+ // Finish off the function.
|
|
|
+ Builder.CreateRet(RetVal);
|
|
|
+
|
|
|
+ // Validate the generated code, checking for consistency.
|
|
|
+ verifyFunction(*TheFunction);
|
|
|
+
|
|
|
+ // Run the optimizer on the function.
|
|
|
+ TheFPM->run(*TheFunction);
|
|
|
+
|
|
|
+ return TheFunction;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Error reading body, remove function.
|
|
|
+ TheFunction->eraseFromParent();
|
|
|
+
|
|
|
+ if (P.isBinaryOp())
|
|
|
+ BinopPrecedence.erase(Proto->getOperatorName());
|
|
|
+ return nullptr;
|
|
|
+}
|
|
|
+
|
|
|
+//===----------------------------------------------------------------------===//
|
|
|
+// Top-Level parsing and JIT Driver
|
|
|
+//===----------------------------------------------------------------------===//
|
|
|
+
|
|
|
+static void InitializeModuleAndPassManager() {
|
|
|
+ // Open a new module.
|
|
|
+ TheModule = llvm::make_unique<Module>("my cool jit", getGlobalContext());
|
|
|
+ TheModule->setDataLayout(TheJIT->getTargetMachine().createDataLayout());
|
|
|
+
|
|
|
+ // Create a new pass manager attached to it.
|
|
|
+ TheFPM = llvm::make_unique<legacy::FunctionPassManager>(TheModule.get());
|
|
|
+
|
|
|
+ // Do simple "peephole" optimizations and bit-twiddling optzns.
|
|
|
+ TheFPM->add(createInstructionCombiningPass());
|
|
|
+ // Reassociate expressions.
|
|
|
+ TheFPM->add(createReassociatePass());
|
|
|
+ // Eliminate Common SubExpressions.
|
|
|
+ TheFPM->add(createGVNPass());
|
|
|
+ // Simplify the control flow graph (deleting unreachable blocks, etc).
|
|
|
+ TheFPM->add(createCFGSimplificationPass());
|
|
|
+
|
|
|
+ TheFPM->doInitialization();
|
|
|
+}
|
|
|
+
|
|
|
+static void HandleDefinition() {
|
|
|
+ if (auto FnAST = ParseDefinition()) {
|
|
|
+ if (auto *FnIR = FnAST->codegen()) {
|
|
|
+ fprintf(stderr, "Read function definition:");
|
|
|
+ FnIR->dump();
|
|
|
+ TheJIT->addModule(std::move(TheModule));
|
|
|
+ InitializeModuleAndPassManager();
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ // Skip token for error recovery.
|
|
|
+ getNextToken();
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void HandleExtern() {
|
|
|
+ if (auto ProtoAST = ParseExtern()) {
|
|
|
+ if (auto *FnIR = ProtoAST->codegen()) {
|
|
|
+ fprintf(stderr, "Read extern: ");
|
|
|
+ FnIR->dump();
|
|
|
+ FunctionProtos[ProtoAST->getName()] = std::move(ProtoAST);
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ // Skip token for error recovery.
|
|
|
+ getNextToken();
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void HandleTopLevelExpression() {
|
|
|
+ // Evaluate a top-level expression into an anonymous function.
|
|
|
+ if (auto FnAST = ParseTopLevelExpr()) {
|
|
|
+ if (FnAST->codegen()) {
|
|
|
+
|
|
|
+ // JIT the module containing the anonymous expression, keeping a handle so
|
|
|
+ // we can free it later.
|
|
|
+ auto H = TheJIT->addModule(std::move(TheModule));
|
|
|
+ InitializeModuleAndPassManager();
|
|
|
+
|
|
|
+ // Search the JIT for the __anon_expr symbol.
|
|
|
+ auto ExprSymbol = TheJIT->findSymbol("__anon_expr");
|
|
|
+ assert(ExprSymbol && "Function not found");
|
|
|
+
|
|
|
+ // Get the symbol's address and cast it to the right type (takes no
|
|
|
+ // arguments, returns a double) so we can call it as a native function.
|
|
|
+ double (*FP)() = (double (*)())(intptr_t)ExprSymbol.getAddress();
|
|
|
+ fprintf(stderr, "Evaluated to %f\n", FP());
|
|
|
+
|
|
|
+ // Delete the anonymous expression module from the JIT.
|
|
|
+ TheJIT->removeModule(H);
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ // Skip token for error recovery.
|
|
|
+ getNextToken();
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+/// top ::= definition | external | expression | ';'
|
|
|
+static void MainLoop() {
|
|
|
+ while (1) {
|
|
|
+ fprintf(stderr, "ready> ");
|
|
|
+ switch (CurTok) {
|
|
|
+ case tok_eof:
|
|
|
+ return;
|
|
|
+ case ';': // ignore top-level semicolons.
|
|
|
+ getNextToken();
|
|
|
+ break;
|
|
|
+ case tok_def:
|
|
|
+ HandleDefinition();
|
|
|
+ break;
|
|
|
+ case tok_extern:
|
|
|
+ HandleExtern();
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ HandleTopLevelExpression();
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+//===----------------------------------------------------------------------===//
|
|
|
+// "Library" functions that can be "extern'd" from user code.
|
|
|
+//===----------------------------------------------------------------------===//
|
|
|
+
|
|
|
+/// putchard - putchar that takes a double and returns 0.
|
|
|
+extern "C" double putchard(double X) {
|
|
|
+ fputc((char)X, stderr);
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+/// printd - printf that takes a double prints it as "%f\n", returning 0.
|
|
|
+extern "C" double printd(double X) {
|
|
|
+ fprintf(stderr, "%f\n", X);
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+//===----------------------------------------------------------------------===//
|
|
|
+// Main driver code.
|
|
|
+//===----------------------------------------------------------------------===//
|
|
|
+
|
|
|
+int main() {
|
|
|
+ InitializeNativeTarget();
|
|
|
+ InitializeNativeTargetAsmPrinter();
|
|
|
+ InitializeNativeTargetAsmParser();
|
|
|
+
|
|
|
+ // Install standard binary operators.
|
|
|
+ // 1 is lowest precedence.
|
|
|
+ BinopPrecedence['='] = 2;
|
|
|
+ BinopPrecedence['<'] = 10;
|
|
|
+ BinopPrecedence['+'] = 20;
|
|
|
+ BinopPrecedence['-'] = 20;
|
|
|
+ BinopPrecedence['*'] = 40; // highest.
|
|
|
+
|
|
|
+ // Prime the first token.
|
|
|
+ fprintf(stderr, "ready> ");
|
|
|
+ getNextToken();
|
|
|
+
|
|
|
+ TheJIT = llvm::make_unique<KaleidoscopeJIT>();
|
|
|
+
|
|
|
+ InitializeModuleAndPassManager();
|
|
|
+
|
|
|
+ // Run the main "interpreter loop" now.
|
|
|
+ MainLoop();
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
