toy-jit.cpp revision dbbbccc3492aa7f91f21d8902cfb0b766dabb849
1dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#define MINIMAL_STDERR_OUTPUT 2dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 3dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/Analysis/Passes.h" 4dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/Analysis/Verifier.h" 5dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/ExecutionEngine/ExecutionEngine.h" 6dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/ExecutionEngine/JIT.h" 7dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/IR/DataLayout.h" 8dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/IR/DerivedTypes.h" 9dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/IR/IRBuilder.h" 10dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/IR/LLVMContext.h" 11dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/IR/Module.h" 12dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/PassManager.h" 13dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/Support/TargetSelect.h" 14dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/Transforms/Scalar.h" 15dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include <cstdio> 16dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include <map> 17dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include <string> 18dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include <vector> 19dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 20dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorusing namespace llvm; 21dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 22dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 23dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// Lexer 24dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 25dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 26dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// The lexer returns tokens [0-255] if it is an unknown character, otherwise one 27dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// of these for known things. 28dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorenum Token { 29dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_eof = -1, 30dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 31dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // commands 32dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_def = -2, tok_extern = -3, 33dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 34dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // primary 35dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_identifier = -4, tok_number = -5, 36dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 37dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // control 38dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_if = -6, tok_then = -7, tok_else = -8, 39dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_for = -9, tok_in = -10, 40dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 41dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // operators 42dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_binary = -11, tok_unary = -12, 43dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 44dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // var definition 45dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_var = -13 46dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 47dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 48dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic std::string IdentifierStr; // Filled in if tok_identifier 49dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic double NumVal; // Filled in if tok_number 50dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 51dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// gettok - Return the next token from standard input. 52dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic int gettok() { 53dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor static int LastChar = ' '; 54dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 55dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Skip any whitespace. 56dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (isspace(LastChar)) 57dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor LastChar = getchar(); 58dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 59dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (isalpha(LastChar)) { // identifier: [a-zA-Z][a-zA-Z0-9]* 60dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor IdentifierStr = LastChar; 61dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (isalnum((LastChar = getchar()))) 62dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor IdentifierStr += LastChar; 63dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 64dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "def") return tok_def; 65dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "extern") return tok_extern; 66dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "if") return tok_if; 67dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "then") return tok_then; 68dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "else") return tok_else; 69dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "for") return tok_for; 70dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "in") return tok_in; 71dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "binary") return tok_binary; 72dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "unary") return tok_unary; 73dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "var") return tok_var; 74dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return tok_identifier; 75dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 76dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 77dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (isdigit(LastChar) || LastChar == '.') { // Number: [0-9.]+ 78dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string NumStr; 79dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor do { 80dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NumStr += LastChar; 81dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor LastChar = getchar(); 82dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } while (isdigit(LastChar) || LastChar == '.'); 83dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 84dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NumVal = strtod(NumStr.c_str(), 0); 85dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return tok_number; 86dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 87dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 88dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (LastChar == '#') { 89dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Comment until end of line. 90dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor do LastChar = getchar(); 91dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (LastChar != EOF && LastChar != '\n' && LastChar != '\r'); 92dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 93dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (LastChar != EOF) 94dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return gettok(); 95dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 96dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 97dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Check for end of file. Don't eat the EOF. 98dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (LastChar == EOF) 99dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return tok_eof; 100dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 101dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Otherwise, just return the character as its ascii value. 102dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor int ThisChar = LastChar; 103dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor LastChar = getchar(); 104dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ThisChar; 105dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 106dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 107dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 108dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// Abstract Syntax Tree (aka Parse Tree) 109dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 110dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 111dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ExprAST - Base class for all expression nodes. 112dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass ExprAST { 113dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 114dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual ~ExprAST() {} 115dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen() = 0; 116dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 117dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 118dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// NumberExprAST - Expression class for numeric literals like "1.0". 119dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass NumberExprAST : public ExprAST { 120dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor double Val; 121dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 122dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NumberExprAST(double val) : Val(val) {} 123dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 124dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 125dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 126dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// VariableExprAST - Expression class for referencing a variable, like "a". 127dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass VariableExprAST : public ExprAST { 128dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string Name; 129dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 130dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor VariableExprAST(const std::string &name) : Name(name) {} 131dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor const std::string &getName() const { return Name; } 132dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 133dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 134dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 135dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// UnaryExprAST - Expression class for a unary operator. 136dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass UnaryExprAST : public ExprAST { 137dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor char Opcode; 138dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Operand; 139dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 140dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor UnaryExprAST(char opcode, ExprAST *operand) 141dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : Opcode(opcode), Operand(operand) {} 142dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 143dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 144dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 145dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// BinaryExprAST - Expression class for a binary operator. 146dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass BinaryExprAST : public ExprAST { 147dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor char Op; 148dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *LHS, *RHS; 149dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 150dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinaryExprAST(char op, ExprAST *lhs, ExprAST *rhs) 151dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : Op(op), LHS(lhs), RHS(rhs) {} 152dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 153dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 154dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 155dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// CallExprAST - Expression class for function calls. 156dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass CallExprAST : public ExprAST { 157dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string Callee; 158dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<ExprAST*> Args; 159dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 160dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor CallExprAST(const std::string &callee, std::vector<ExprAST*> &args) 161dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : Callee(callee), Args(args) {} 162dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 163dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 164dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 165dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// IfExprAST - Expression class for if/then/else. 166dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass IfExprAST : public ExprAST { 167dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Cond, *Then, *Else; 168dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 169dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor IfExprAST(ExprAST *cond, ExprAST *then, ExprAST *_else) 170dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : Cond(cond), Then(then), Else(_else) {} 171dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 172dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 173dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 174dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ForExprAST - Expression class for for/in. 175dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass ForExprAST : public ExprAST { 176dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string VarName; 177dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Start, *End, *Step, *Body; 178dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 179dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ForExprAST(const std::string &varname, ExprAST *start, ExprAST *end, 180dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *step, ExprAST *body) 181dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : VarName(varname), Start(start), End(end), Step(step), Body(body) {} 182dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 183dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 184dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 185dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// VarExprAST - Expression class for var/in 186dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass VarExprAST : public ExprAST { 187dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<std::pair<std::string, ExprAST*> > VarNames; 188dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Body; 189dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 190dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor VarExprAST(const std::vector<std::pair<std::string, ExprAST*> > &varnames, 191dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *body) 192dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : VarNames(varnames), Body(body) {} 193dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 194dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 195dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 196dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 197dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// PrototypeAST - This class represents the "prototype" for a function, 198dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// which captures its argument names as well as if it is an operator. 199dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass PrototypeAST { 200dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string Name; 201dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<std::string> Args; 202dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor bool isOperator; 203dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor unsigned Precedence; // Precedence if a binary op. 204dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 205dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PrototypeAST(const std::string &name, const std::vector<std::string> &args, 206dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor bool isoperator = false, unsigned prec = 0) 207dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : Name(name), Args(args), isOperator(isoperator), Precedence(prec) {} 208dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 209dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor bool isUnaryOp() const { return isOperator && Args.size() == 1; } 210dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor bool isBinaryOp() const { return isOperator && Args.size() == 2; } 211dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 212dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor char getOperatorName() const { 213dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor assert(isUnaryOp() || isBinaryOp()); 214dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Name[Name.size()-1]; 215dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 216dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 217dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor unsigned getBinaryPrecedence() const { return Precedence; } 218dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 219dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *Codegen(); 220dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 221dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor void CreateArgumentAllocas(Function *F); 222dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 223dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 224dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// FunctionAST - This class represents a function definition itself. 225dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass FunctionAST { 226dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PrototypeAST *Proto; 227dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Body; 228dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 229dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FunctionAST(PrototypeAST *proto, ExprAST *body) 230dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : Proto(proto), Body(body) {} 231dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 232dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *Codegen(); 233dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 234dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 235dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 236dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// Parser 237dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 238dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 239dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// CurTok/getNextToken - Provide a simple token buffer. CurTok is the current 240dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// token the parser is looking at. getNextToken reads another token from the 241dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// lexer and updates CurTok with its results. 242dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic int CurTok; 243dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic int getNextToken() { 244dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return CurTok = gettok(); 245dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 246dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 247dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// BinopPrecedence - This holds the precedence for each binary operator that is 248dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// defined. 249dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic std::map<char, int> BinopPrecedence; 250dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 251dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// GetTokPrecedence - Get the precedence of the pending binary operator token. 252dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic int GetTokPrecedence() { 253dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!isascii(CurTok)) 254dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return -1; 255dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 256dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Make sure it's a declared binop. 257dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor int TokPrec = BinopPrecedence[CurTok]; 258dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (TokPrec <= 0) return -1; 259dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return TokPrec; 260dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 261dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 262dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// Error* - These are little helper functions for error handling. 263dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorExprAST *Error(const char *Str) { fprintf(stderr, "Error: %s\n", Str);return 0;} 264dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorPrototypeAST *ErrorP(const char *Str) { Error(Str); return 0; } 265dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorFunctionAST *ErrorF(const char *Str) { Error(Str); return 0; } 266dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 267dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseExpression(); 268dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 269dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// identifierexpr 270dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= identifier 271dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= identifier '(' expression* ')' 272dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseIdentifierExpr() { 273dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string IdName = IdentifierStr; 274dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 275dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat identifier. 276dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 277dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != '(') // Simple variable ref. 278dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new VariableExprAST(IdName); 279dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 280dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Call. 281dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat ( 282dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<ExprAST*> Args; 283dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != ')') { 284dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (1) { 285dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Arg = ParseExpression(); 286dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!Arg) return 0; 287dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Args.push_back(Arg); 288dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 289dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok == ')') break; 290dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 291dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != ',') 292dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("Expected ')' or ',' in argument list"); 293dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 294dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 295dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 296dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 297dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Eat the ')'. 298dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 299dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 300dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new CallExprAST(IdName, Args); 301dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 302dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 303dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// numberexpr ::= number 304dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseNumberExpr() { 305dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Result = new NumberExprAST(NumVal); 306dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // consume the number 307dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Result; 308dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 309dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 310dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// parenexpr ::= '(' expression ')' 311dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseParenExpr() { 312dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat (. 313dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *V = ParseExpression(); 314dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!V) return 0; 315dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 316dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != ')') 317dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected ')'"); 318dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat ). 319dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return V; 320dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 321dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 322dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ifexpr ::= 'if' expression 'then' expression 'else' expression 323dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseIfExpr() { 324dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat the if. 325dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 326dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // condition. 327dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Cond = ParseExpression(); 328dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!Cond) return 0; 329dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 330dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_then) 331dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected then"); 332dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat the then 333dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 334dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Then = ParseExpression(); 335dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Then == 0) return 0; 336dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 337dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_else) 338dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected else"); 339dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 340dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 341dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 342dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Else = ParseExpression(); 343dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!Else) return 0; 344dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 345dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new IfExprAST(Cond, Then, Else); 346dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 347dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 348dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// forexpr ::= 'for' identifier '=' expr ',' expr (',' expr)? 'in' expression 349dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseForExpr() { 350dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat the for. 351dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 352dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_identifier) 353dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected identifier after for"); 354dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 355dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string IdName = IdentifierStr; 356dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat identifier. 357dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 358dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != '=') 359dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected '=' after for"); 360dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat '='. 361dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 362dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 363dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Start = ParseExpression(); 364dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Start == 0) return 0; 365dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != ',') 366dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected ',' after for start value"); 367dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 368dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 369dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *End = ParseExpression(); 370dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (End == 0) return 0; 371dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 372dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // The step value is optional. 373dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Step = 0; 374dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok == ',') { 375dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 376dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Step = ParseExpression(); 377dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Step == 0) return 0; 378dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 379dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 380dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_in) 381dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected 'in' after for"); 382dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat 'in'. 383dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 384dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Body = ParseExpression(); 385dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Body == 0) return 0; 386dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 387dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new ForExprAST(IdName, Start, End, Step, Body); 388dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 389dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 390dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// varexpr ::= 'var' identifier ('=' expression)? 391dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// (',' identifier ('=' expression)?)* 'in' expression 392dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseVarExpr() { 393dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat the var. 394dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 395dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<std::pair<std::string, ExprAST*> > VarNames; 396dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 397dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // At least one variable name is required. 398dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_identifier) 399dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected identifier after var"); 400dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 401dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (1) { 402dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string Name = IdentifierStr; 403dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat identifier. 404dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 405dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Read the optional initializer. 406dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Init = 0; 407dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok == '=') { 408dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat the '='. 409dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 410dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Init = ParseExpression(); 411dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Init == 0) return 0; 412dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 413dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 414dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor VarNames.push_back(std::make_pair(Name, Init)); 415dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 416dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // End of var list, exit loop. 417dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != ',') break; 418dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat the ','. 419dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 420dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_identifier) 421dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected identifier list after var"); 422dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 423dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 424dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // At this point, we have to have 'in'. 425dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_in) 426dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected 'in' keyword after 'var'"); 427dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat 'in'. 428dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 429dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Body = ParseExpression(); 430dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Body == 0) return 0; 431dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 432dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new VarExprAST(VarNames, Body); 433dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 434dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 435dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// primary 436dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= identifierexpr 437dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= numberexpr 438dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= parenexpr 439dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= ifexpr 440dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= forexpr 441dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= varexpr 442dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParsePrimary() { 443dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor switch (CurTok) { 444dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor default: return Error("unknown token when expecting an expression"); 445dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_identifier: return ParseIdentifierExpr(); 446dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_number: return ParseNumberExpr(); 447dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case '(': return ParseParenExpr(); 448dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_if: return ParseIfExpr(); 449dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_for: return ParseForExpr(); 450dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_var: return ParseVarExpr(); 451dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 452dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 453dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 454dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// unary 455dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= primary 456dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= '!' unary 457dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseUnary() { 458dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If the current token is not an operator, it must be a primary expr. 459dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!isascii(CurTok) || CurTok == '(' || CurTok == ',') 460dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ParsePrimary(); 461dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 462dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If this is a unary operator, read it. 463dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor int Opc = CurTok; 464dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 465dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (ExprAST *Operand = ParseUnary()) 466dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new UnaryExprAST(Opc, Operand); 467dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 468dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 469dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 470dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// binoprhs 471dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= ('+' unary)* 472dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseBinOpRHS(int ExprPrec, ExprAST *LHS) { 473dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If this is a binop, find its precedence. 474dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (1) { 475dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor int TokPrec = GetTokPrecedence(); 476dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 477dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If this is a binop that binds at least as tightly as the current binop, 478dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // consume it, otherwise we are done. 479dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (TokPrec < ExprPrec) 480dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return LHS; 481dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 482dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Okay, we know this is a binop. 483dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor int BinOp = CurTok; 484dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat binop 485dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 486dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Parse the unary expression after the binary operator. 487dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *RHS = ParseUnary(); 488dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!RHS) return 0; 489dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 490dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If BinOp binds less tightly with RHS than the operator after RHS, let 491dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // the pending operator take RHS as its LHS. 492dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor int NextPrec = GetTokPrecedence(); 493dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (TokPrec < NextPrec) { 494dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor RHS = ParseBinOpRHS(TokPrec+1, RHS); 495dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (RHS == 0) return 0; 496dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 497dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 498dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Merge LHS/RHS. 499dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor LHS = new BinaryExprAST(BinOp, LHS, RHS); 500dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 501dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 502dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 503dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// expression 504dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= unary binoprhs 505dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// 506dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseExpression() { 507dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *LHS = ParseUnary(); 508dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!LHS) return 0; 509dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 510dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ParseBinOpRHS(0, LHS); 511dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 512dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 513dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// prototype 514dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= id '(' id* ')' 515dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= binary LETTER number? (id, id) 516dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= unary LETTER (id) 517dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic PrototypeAST *ParsePrototype() { 518dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string FnName; 519dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 520dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor unsigned Kind = 0; // 0 = identifier, 1 = unary, 2 = binary. 521dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor unsigned BinaryPrecedence = 30; 522dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 523dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor switch (CurTok) { 524dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor default: 525dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Expected function name in prototype"); 526dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_identifier: 527dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FnName = IdentifierStr; 528dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Kind = 0; 529dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 530dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor break; 531dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_unary: 532dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 533dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!isascii(CurTok)) 534dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Expected unary operator"); 535dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FnName = "unary"; 536dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FnName += (char)CurTok; 537dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Kind = 1; 538dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 539dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor break; 540dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_binary: 541dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 542dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!isascii(CurTok)) 543dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Expected binary operator"); 544dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FnName = "binary"; 545dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FnName += (char)CurTok; 546dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Kind = 2; 547dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 548dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 549dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Read the precedence if present. 550dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok == tok_number) { 551dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (NumVal < 1 || NumVal > 100) 552dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Invalid precedecnce: must be 1..100"); 553dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinaryPrecedence = (unsigned)NumVal; 554dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 555dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 556dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor break; 557dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 558dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 559dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != '(') 560dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Expected '(' in prototype"); 561dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 562dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<std::string> ArgNames; 563dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (getNextToken() == tok_identifier) 564dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ArgNames.push_back(IdentifierStr); 565dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != ')') 566dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Expected ')' in prototype"); 567dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 568dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // success. 569dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat ')'. 570dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 571dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Verify right number of names for operator. 572dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Kind && ArgNames.size() != Kind) 573dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Invalid number of operands for operator"); 574dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 575dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new PrototypeAST(FnName, ArgNames, Kind != 0, BinaryPrecedence); 576dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 577dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 578dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// definition ::= 'def' prototype expression 579dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic FunctionAST *ParseDefinition() { 580dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat def. 581dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PrototypeAST *Proto = ParsePrototype(); 582dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Proto == 0) return 0; 583dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 584dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (ExprAST *E = ParseExpression()) 585dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new FunctionAST(Proto, E); 586dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 587dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 588dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 589dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// toplevelexpr ::= expression 590dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic FunctionAST *ParseTopLevelExpr() { 591dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (ExprAST *E = ParseExpression()) { 592dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Make an anonymous proto. 593dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PrototypeAST *Proto = new PrototypeAST("", std::vector<std::string>()); 594dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new FunctionAST(Proto, E); 595dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 596dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 597dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 598dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 599dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// external ::= 'extern' prototype 600dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic PrototypeAST *ParseExtern() { 601dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat extern. 602dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ParsePrototype(); 603dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 604dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 605dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 606dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// Code Generation 607dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 608dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 609dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic Module *TheModule; 610dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic FunctionPassManager *TheFPM; 611dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic IRBuilder<> Builder(getGlobalContext()); 612dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic std::map<std::string, AllocaInst*> NamedValues; 613dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 614dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *ErrorV(const char *Str) { Error(Str); return 0; } 615dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 616dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// CreateEntryBlockAlloca - Create an alloca instruction in the entry block of 617dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// the function. This is used for mutable variables etc. 618dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic AllocaInst *CreateEntryBlockAlloca(Function *TheFunction, 619dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor const std::string &VarName) { 620dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor IRBuilder<> TmpB(&TheFunction->getEntryBlock(), 621dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheFunction->getEntryBlock().begin()); 622dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return TmpB.CreateAlloca(Type::getDoubleTy(getGlobalContext()), 0, 623dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor VarName.c_str()); 624dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 625dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 626dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *NumberExprAST::Codegen() { 627dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ConstantFP::get(getGlobalContext(), APFloat(Val)); 628dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 629dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 630dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *VariableExprAST::Codegen() { 631dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Look this variable up in the function. 632dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *V = NamedValues[Name]; 633dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (V == 0) return ErrorV("Unknown variable name"); 634dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 635dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Load the value. 636dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Builder.CreateLoad(V, Name.c_str()); 637dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 638dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 639dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *UnaryExprAST::Codegen() { 640dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *OperandV = Operand->Codegen(); 641dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (OperandV == 0) return 0; 642dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifdef USE_MCJIT 643dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *F = TheHelper->getFunction(MakeLegalFunctionName(std::string("unary")+Opcode)); 644dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#else 645dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *F = TheModule->getFunction(std::string("unary")+Opcode); 646dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 647dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (F == 0) 648dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorV("Unknown unary operator"); 649dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 650dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Builder.CreateCall(F, OperandV, "unop"); 651dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 652dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 653dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *BinaryExprAST::Codegen() { 654dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Special case '=' because we don't want to emit the LHS as an expression. 655dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Op == '=') { 656dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Assignment requires the LHS to be an identifier. 657dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor VariableExprAST *LHSE = dynamic_cast<VariableExprAST*>(LHS); 658dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!LHSE) 659dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorV("destination of '=' must be a variable"); 660dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Codegen the RHS. 661dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *Val = RHS->Codegen(); 662dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Val == 0) return 0; 663dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 664dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Look up the name. 665dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *Variable = NamedValues[LHSE->getName()]; 666dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Variable == 0) return ErrorV("Unknown variable name"); 667dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 668dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateStore(Val, Variable); 669dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Val; 670dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 671dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 672dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *L = LHS->Codegen(); 673dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *R = RHS->Codegen(); 674dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (L == 0 || R == 0) return 0; 675dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 676dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor switch (Op) { 677dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case '+': return Builder.CreateFAdd(L, R, "addtmp"); 678dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case '-': return Builder.CreateFSub(L, R, "subtmp"); 679dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case '*': return Builder.CreateFMul(L, R, "multmp"); 680dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case '/': return Builder.CreateFDiv(L, R, "divtmp"); 681dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case '<': 682dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor L = Builder.CreateFCmpULT(L, R, "cmptmp"); 683dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Convert bool 0/1 to double 0.0 or 1.0 684dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Builder.CreateUIToFP(L, Type::getDoubleTy(getGlobalContext()), 685dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor "booltmp"); 686dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor default: break; 687dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 688dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 689dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If it wasn't a builtin binary operator, it must be a user defined one. Emit 690dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // a call to it. 691dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *F = TheModule->getFunction(std::string("binary")+Op); 692dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor assert(F && "binary operator not found!"); 693dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 694dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *Ops[] = { L, R }; 695dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Builder.CreateCall(F, Ops, "binop"); 696dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 697dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 698dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *CallExprAST::Codegen() { 699dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Look up the name in the global module table. 700dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *CalleeF = TheModule->getFunction(Callee); 701dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CalleeF == 0) { 702dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor char error_str[64]; 703dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor sprintf(error_str, "Unknown function referenced %s", Callee.c_str()); 704dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorV(error_str); 705dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 706dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 707dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If argument mismatch error. 708dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CalleeF->arg_size() != Args.size()) 709dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorV("Incorrect # arguments passed"); 710dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 711dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<Value*> ArgsV; 712dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (unsigned i = 0, e = Args.size(); i != e; ++i) { 713dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ArgsV.push_back(Args[i]->Codegen()); 714dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (ArgsV.back() == 0) return 0; 715dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 716dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 717dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Builder.CreateCall(CalleeF, ArgsV, "calltmp"); 718dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 719dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 720dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *IfExprAST::Codegen() { 721dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *CondV = Cond->Codegen(); 722dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CondV == 0) return 0; 723dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 724dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Convert condition to a bool by comparing equal to 0.0. 725dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor CondV = Builder.CreateFCmpONE(CondV, 726dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ConstantFP::get(getGlobalContext(), APFloat(0.0)), 727dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor "ifcond"); 728dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 729dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *TheFunction = Builder.GetInsertBlock()->getParent(); 730dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 731dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Create blocks for the then and else cases. Insert the 'then' block at the 732dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // end of the function. 733dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BasicBlock *ThenBB = BasicBlock::Create(getGlobalContext(), "then", TheFunction); 734dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BasicBlock *ElseBB = BasicBlock::Create(getGlobalContext(), "else"); 735dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BasicBlock *MergeBB = BasicBlock::Create(getGlobalContext(), "ifcont"); 736dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 737dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateCondBr(CondV, ThenBB, ElseBB); 738dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 739dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit then value. 740dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.SetInsertPoint(ThenBB); 741dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 742dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *ThenV = Then->Codegen(); 743dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (ThenV == 0) return 0; 744dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 745dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateBr(MergeBB); 746dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Codegen of 'Then' can change the current block, update ThenBB for the PHI. 747dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ThenBB = Builder.GetInsertBlock(); 748dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 749dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit else block. 750dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheFunction->getBasicBlockList().push_back(ElseBB); 751dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.SetInsertPoint(ElseBB); 752dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 753dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *ElseV = Else->Codegen(); 754dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (ElseV == 0) return 0; 755dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 756dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateBr(MergeBB); 757dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Codegen of 'Else' can change the current block, update ElseBB for the PHI. 758dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ElseBB = Builder.GetInsertBlock(); 759dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 760dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit merge block. 761dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheFunction->getBasicBlockList().push_back(MergeBB); 762dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.SetInsertPoint(MergeBB); 763dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PHINode *PN = Builder.CreatePHI(Type::getDoubleTy(getGlobalContext()), 2, 764dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor "iftmp"); 765dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 766dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PN->addIncoming(ThenV, ThenBB); 767dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PN->addIncoming(ElseV, ElseBB); 768dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return PN; 769dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 770dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 771dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *ForExprAST::Codegen() { 772dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Output this as: 773dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // var = alloca double 774dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // ... 775dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // start = startexpr 776dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // store start -> var 777dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // goto loop 778dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // loop: 779dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // ... 780dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // bodyexpr 781dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // ... 782dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // loopend: 783dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // step = stepexpr 784dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // endcond = endexpr 785dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // 786dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // curvar = load var 787dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // nextvar = curvar + step 788dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // store nextvar -> var 789dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // br endcond, loop, endloop 790dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // outloop: 791dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 792dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *TheFunction = Builder.GetInsertBlock()->getParent(); 793dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 794dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Create an alloca for the variable in the entry block. 795dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor AllocaInst *Alloca = CreateEntryBlockAlloca(TheFunction, VarName); 796dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 797dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit the start code first, without 'variable' in scope. 798dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *StartVal = Start->Codegen(); 799dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (StartVal == 0) return 0; 800dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 801dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Store the value into the alloca. 802dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateStore(StartVal, Alloca); 803dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 804dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Make the new basic block for the loop header, inserting after current 805dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // block. 806dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BasicBlock *LoopBB = BasicBlock::Create(getGlobalContext(), "loop", TheFunction); 807dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 808dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Insert an explicit fall through from the current block to the LoopBB. 809dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateBr(LoopBB); 810dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 811dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Start insertion in LoopBB. 812dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.SetInsertPoint(LoopBB); 813dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 814dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Within the loop, the variable is defined equal to the PHI node. If it 815dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // shadows an existing variable, we have to restore it, so save it now. 816dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor AllocaInst *OldVal = NamedValues[VarName]; 817dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues[VarName] = Alloca; 818dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 819dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit the body of the loop. This, like any other expr, can change the 820dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // current BB. Note that we ignore the value computed by the body, but don't 821dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // allow an error. 822dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Body->Codegen() == 0) 823dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 824dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 825dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit the step value. 826dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *StepVal; 827dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Step) { 828dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor StepVal = Step->Codegen(); 829dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (StepVal == 0) return 0; 830dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } else { 831dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If not specified, use 1.0. 832dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor StepVal = ConstantFP::get(getGlobalContext(), APFloat(1.0)); 833dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 834dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 835dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Compute the end condition. 836dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *EndCond = End->Codegen(); 837dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (EndCond == 0) return EndCond; 838dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 839dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Reload, increment, and restore the alloca. This handles the case where 840dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // the body of the loop mutates the variable. 841dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *CurVar = Builder.CreateLoad(Alloca, VarName.c_str()); 842dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *NextVar = Builder.CreateFAdd(CurVar, StepVal, "nextvar"); 843dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateStore(NextVar, Alloca); 844dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 845dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Convert condition to a bool by comparing equal to 0.0. 846dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor EndCond = Builder.CreateFCmpONE(EndCond, 847dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ConstantFP::get(getGlobalContext(), APFloat(0.0)), 848dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor "loopcond"); 849dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 850dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Create the "after loop" block and insert it. 851dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BasicBlock *AfterBB = BasicBlock::Create(getGlobalContext(), "afterloop", TheFunction); 852dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 853dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Insert the conditional branch into the end of LoopEndBB. 854dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateCondBr(EndCond, LoopBB, AfterBB); 855dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 856dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Any new code will be inserted in AfterBB. 857dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.SetInsertPoint(AfterBB); 858dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 859dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Restore the unshadowed variable. 860dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (OldVal) 861dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues[VarName] = OldVal; 862dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor else 863dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues.erase(VarName); 864dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 865dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 866dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // for expr always returns 0.0. 867dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Constant::getNullValue(Type::getDoubleTy(getGlobalContext())); 868dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 869dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 870dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *VarExprAST::Codegen() { 871dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<AllocaInst *> OldBindings; 872dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 873dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *TheFunction = Builder.GetInsertBlock()->getParent(); 874dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 875dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Register all variables and emit their initializer. 876dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (unsigned i = 0, e = VarNames.size(); i != e; ++i) { 877dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor const std::string &VarName = VarNames[i].first; 878dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Init = VarNames[i].second; 879dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 880dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit the initializer before adding the variable to scope, this prevents 881dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // the initializer from referencing the variable itself, and permits stuff 882dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // like this: 883dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // var a = 1 in 884dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // var a = a in ... # refers to outer 'a'. 885dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *InitVal; 886dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Init) { 887dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor InitVal = Init->Codegen(); 888dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (InitVal == 0) return 0; 889dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } else { // If not specified, use 0.0. 890dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor InitVal = ConstantFP::get(getGlobalContext(), APFloat(0.0)); 891dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 892dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 893dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor AllocaInst *Alloca = CreateEntryBlockAlloca(TheFunction, VarName); 894dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateStore(InitVal, Alloca); 895dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 896dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Remember the old variable binding so that we can restore the binding when 897dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // we unrecurse. 898dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OldBindings.push_back(NamedValues[VarName]); 899dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 900dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Remember this binding. 901dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues[VarName] = Alloca; 902dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 903dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 904dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Codegen the body, now that all vars are in scope. 905dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *BodyVal = Body->Codegen(); 906dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (BodyVal == 0) return 0; 907dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 908dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Pop all our variables from scope. 909dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (unsigned i = 0, e = VarNames.size(); i != e; ++i) 910dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues[VarNames[i].first] = OldBindings[i]; 911dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 912dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Return the body computation. 913dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return BodyVal; 914dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 915dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 916dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorFunction *PrototypeAST::Codegen() { 917dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Make the function type: double(double,double) etc. 918dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<Type*> Doubles(Args.size(), 919dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Type::getDoubleTy(getGlobalContext())); 920dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FunctionType *FT = FunctionType::get(Type::getDoubleTy(getGlobalContext()), 921dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Doubles, false); 922dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 923dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *F = Function::Create(FT, Function::ExternalLinkage, Name, TheModule); 924dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If F conflicted, there was already something named 'Name'. If it has a 925dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // body, don't allow redefinition or reextern. 926dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (F->getName() != Name) { 927dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Delete the one we just made and get the existing one. 928dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor F->eraseFromParent(); 929dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor F = TheModule->getFunction(Name); 930dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If F already has a body, reject this. 931dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!F->empty()) { 932dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ErrorF("redefinition of function"); 933dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 934dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 935dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If F took a different number of args, reject. 936dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (F->arg_size() != Args.size()) { 937dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ErrorF("redefinition of function with different # args"); 938dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 939dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 940dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 941dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 942dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Set names for all arguments. 943dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor unsigned Idx = 0; 944dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (Function::arg_iterator AI = F->arg_begin(); Idx != Args.size(); 945dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ++AI, ++Idx) 946dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor AI->setName(Args[Idx]); 947dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 948dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return F; 949dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 950dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 951dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// CreateArgumentAllocas - Create an alloca for each argument and register the 952dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// argument in the symbol table so that references to it will succeed. 953dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorvoid PrototypeAST::CreateArgumentAllocas(Function *F) { 954dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function::arg_iterator AI = F->arg_begin(); 955dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (unsigned Idx = 0, e = Args.size(); Idx != e; ++Idx, ++AI) { 956dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Create an alloca for this variable. 957dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor AllocaInst *Alloca = CreateEntryBlockAlloca(F, Args[Idx]); 958dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 959dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Store the initial value into the alloca. 960dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateStore(AI, Alloca); 961dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 962dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Add arguments to variable symbol table. 963dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues[Args[Idx]] = Alloca; 964dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 965dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 966dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 967dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorFunction *FunctionAST::Codegen() { 968dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues.clear(); 969dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 970dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *TheFunction = Proto->Codegen(); 971dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (TheFunction == 0) 972dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 973dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 974dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If this is an operator, install it. 975dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Proto->isBinaryOp()) 976dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence[Proto->getOperatorName()] = Proto->getBinaryPrecedence(); 977dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 978dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Create a new basic block to start insertion into. 979dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BasicBlock *BB = BasicBlock::Create(getGlobalContext(), "entry", TheFunction); 980dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.SetInsertPoint(BB); 981dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 982dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Add all arguments to the symbol table and create their allocas. 983dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Proto->CreateArgumentAllocas(TheFunction); 984dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 985dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Value *RetVal = Body->Codegen()) { 986dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Finish off the function. 987dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateRet(RetVal); 988dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 989dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Validate the generated code, checking for consistency. 990dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor verifyFunction(*TheFunction); 991dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 992dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Optimize the function. 993dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheFPM->run(*TheFunction); 994dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 995dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return TheFunction; 996dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 997dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 998dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Error reading body, remove function. 999dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheFunction->eraseFromParent(); 1000dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1001dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Proto->isBinaryOp()) 1002dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence.erase(Proto->getOperatorName()); 1003dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 1004dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1005dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1006dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 1007dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// Top-Level parsing and JIT Driver 1008dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 1009dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1010dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExecutionEngine *TheExecutionEngine; 1011dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1012dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic void HandleDefinition() { 1013dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (FunctionAST *F = ParseDefinition()) { 1014dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Function *LF = F->Codegen()) { 1015dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifndef MINIMAL_STDERR_OUTPUT 1016dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor fprintf(stderr, "Read function definition:"); 1017dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor LF->dump(); 1018dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 1019dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1020dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } else { 1021dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Skip token for error recovery. 1022dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 1023dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1024dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1025dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1026dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic void HandleExtern() { 1027dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (PrototypeAST *P = ParseExtern()) { 1028dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Function *F = P->Codegen()) { 1029dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifndef MINIMAL_STDERR_OUTPUT 1030dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor fprintf(stderr, "Read extern: "); 1031dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor F->dump(); 1032dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 1033dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1034dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } else { 1035dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Skip token for error recovery. 1036dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 1037dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1038dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1039dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1040dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic void HandleTopLevelExpression() { 1041dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Evaluate a top-level expression into an anonymous function. 1042dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (FunctionAST *F = ParseTopLevelExpr()) { 1043dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Function *LF = F->Codegen()) { 1044dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // JIT the function, returning a function pointer. 1045dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor void *FPtr = TheExecutionEngine->getPointerToFunction(LF); 1046dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Cast it to the right type (takes no arguments, returns a double) so we 1047dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // can call it as a native function. 1048dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor double (*FP)() = (double (*)())(intptr_t)FPtr; 1049dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifdef MINIMAL_STDERR_OUTPUT 1050dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FP(); 1051dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#else 1052dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor fprintf(stderr, "Evaluated to %f\n", FP()); 1053dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 1054dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1055dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } else { 1056dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Skip token for error recovery. 1057dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 1058dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1059dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1060dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1061dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// top ::= definition | external | expression | ';' 1062dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic void MainLoop() { 1063dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (1) { 1064dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifndef MINIMAL_STDERR_OUTPUT 1065dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor fprintf(stderr, "ready> "); 1066dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 1067dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor switch (CurTok) { 1068dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_eof: return; 1069dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case ';': getNextToken(); break; // ignore top-level semicolons. 1070dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_def: HandleDefinition(); break; 1071dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_extern: HandleExtern(); break; 1072dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor default: HandleTopLevelExpression(); break; 1073dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1074dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1075dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1076dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1077dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 1078dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// "Library" functions that can be "extern'd" from user code. 1079dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 1080dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1081dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// putchard - putchar that takes a double and returns 0. 1082dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorextern "C" 1083dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylordouble putchard(double X) { 1084dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor putchar((char)X); 1085dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 1086dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1087dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1088dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// printd - printf that takes a double prints it as "%f\n", returning 0. 1089dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorextern "C" 1090dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylordouble printd(double X) { 1091dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor printf("%f", X); 1092dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 1093dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1094dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1095dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorextern "C" 1096dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylordouble printlf() { 1097dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor printf("\n"); 1098dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 1099dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1100dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1101dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 1102dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// Main driver code. 1103dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 1104dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1105dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorint main(int argc, char **argv) { 1106dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor InitializeNativeTarget(); 1107dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor LLVMContext &Context = getGlobalContext(); 1108dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1109dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Install standard binary operators. 1110dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // 1 is lowest precedence. 1111dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence['='] = 2; 1112dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence['<'] = 10; 1113dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence['+'] = 20; 1114dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence['-'] = 20; 1115dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence['/'] = 40; 1116dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence['*'] = 40; // highest. 1117dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1118dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Make the module, which holds all the code. 1119dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheModule = new Module("my cool jit", Context); 1120dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1121dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Create the JIT. This takes ownership of the module. 1122dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string ErrStr; 1123dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheExecutionEngine = EngineBuilder(TheModule).setErrorStr(&ErrStr).create(); 1124dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!TheExecutionEngine) { 1125dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor fprintf(stderr, "Could not create ExecutionEngine: %s\n", ErrStr.c_str()); 1126dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor exit(1); 1127dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1128dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1129dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FunctionPassManager OurFPM(TheModule); 1130dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1131dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Set up the optimizer pipeline. Start with registering info about how the 1132dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // target lays out data structures. 1133dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OurFPM.add(new DataLayout(*TheExecutionEngine->getDataLayout())); 1134dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Provide basic AliasAnalysis support for GVN. 1135dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OurFPM.add(createBasicAliasAnalysisPass()); 1136dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Promote allocas to registers. 1137dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OurFPM.add(createPromoteMemoryToRegisterPass()); 1138dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Do simple "peephole" optimizations and bit-twiddling optzns. 1139dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OurFPM.add(createInstructionCombiningPass()); 1140dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Reassociate expressions. 1141dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OurFPM.add(createReassociatePass()); 1142dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Eliminate Common SubExpressions. 1143dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OurFPM.add(createGVNPass()); 1144dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Simplify the control flow graph (deleting unreachable blocks, etc). 1145dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OurFPM.add(createCFGSimplificationPass()); 1146dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1147dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OurFPM.doInitialization(); 1148dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1149dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Set the global so the code gen can use this. 1150dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheFPM = &OurFPM; 1151dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1152dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Prime the first token. 1153dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifndef MINIMAL_STDERR_OUTPUT 1154dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor fprintf(stderr, "ready> "); 1155dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 1156dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 1157dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1158dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Run the main "interpreter loop" now. 1159dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor MainLoop(); 1160dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1161dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Print out all of the generated code. 1162dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheFPM = 0; 1163dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifndef MINIMAL_STDERR_OUTPUT 1164dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheModule->dump(); 1165dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 1166dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 1167dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1168