1dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#define MINIMAL_STDERR_OUTPUT 2dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 3dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/Analysis/Passes.h" 4dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/ExecutionEngine/ExecutionEngine.h" 5dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/ExecutionEngine/JIT.h" 6dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/IR/DataLayout.h" 7dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/IR/DerivedTypes.h" 8dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/IR/IRBuilder.h" 9dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/IR/LLVMContext.h" 10dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/IR/Module.h" 1136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines#include "llvm/IR/Verifier.h" 12dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/PassManager.h" 13dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/Support/TargetSelect.h" 14dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/Transforms/Scalar.h" 15e3ba15c794839abe076e3e2bdf6c626396a19d4dWill Dietz#include <cctype> 16dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include <cstdio> 17dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include <map> 18dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include <string> 19dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include <vector> 20dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 21dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorusing namespace llvm; 22dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 23dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 24dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// Lexer 25dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 26dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 27dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// The lexer returns tokens [0-255] if it is an unknown character, otherwise one 28dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// of these for known things. 29dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorenum Token { 30dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_eof = -1, 31dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 32dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // commands 33dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_def = -2, tok_extern = -3, 34dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 35dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // primary 36dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_identifier = -4, tok_number = -5, 37dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 38dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // control 39dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_if = -6, tok_then = -7, tok_else = -8, 40dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_for = -9, tok_in = -10, 41dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 42dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // operators 43dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_binary = -11, tok_unary = -12, 44dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 45dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // var definition 46dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_var = -13 47dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 48dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 49dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic std::string IdentifierStr; // Filled in if tok_identifier 50dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic double NumVal; // Filled in if tok_number 51dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 52dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// gettok - Return the next token from standard input. 53dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic int gettok() { 54dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor static int LastChar = ' '; 55dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 56dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Skip any whitespace. 57dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (isspace(LastChar)) 58dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor LastChar = getchar(); 59dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 60dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (isalpha(LastChar)) { // identifier: [a-zA-Z][a-zA-Z0-9]* 61dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor IdentifierStr = LastChar; 62dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (isalnum((LastChar = getchar()))) 63dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor IdentifierStr += LastChar; 64dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 65dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "def") return tok_def; 66dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "extern") return tok_extern; 67dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "if") return tok_if; 68dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "then") return tok_then; 69dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "else") return tok_else; 70dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "for") return tok_for; 71dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "in") return tok_in; 72dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "binary") return tok_binary; 73dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "unary") return tok_unary; 74dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "var") return tok_var; 75dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return tok_identifier; 76dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 77dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 78dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (isdigit(LastChar) || LastChar == '.') { // Number: [0-9.]+ 79dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string NumStr; 80dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor do { 81dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NumStr += LastChar; 82dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor LastChar = getchar(); 83dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } while (isdigit(LastChar) || LastChar == '.'); 84dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 85dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NumVal = strtod(NumStr.c_str(), 0); 86dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return tok_number; 87dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 88dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 89dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (LastChar == '#') { 90dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Comment until end of line. 91dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor do LastChar = getchar(); 92dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (LastChar != EOF && LastChar != '\n' && LastChar != '\r'); 93dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 94dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (LastChar != EOF) 95dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return gettok(); 96dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 97dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 98dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Check for end of file. Don't eat the EOF. 99dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (LastChar == EOF) 100dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return tok_eof; 101dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 102dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Otherwise, just return the character as its ascii value. 103dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor int ThisChar = LastChar; 104dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor LastChar = getchar(); 105dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ThisChar; 106dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 107dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 108dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 109dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// Abstract Syntax Tree (aka Parse Tree) 110dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 111dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 112dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ExprAST - Base class for all expression nodes. 113dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass ExprAST { 114dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 115dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual ~ExprAST() {} 116dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen() = 0; 117dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 118dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 119dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// NumberExprAST - Expression class for numeric literals like "1.0". 120dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass NumberExprAST : public ExprAST { 121dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor double Val; 122dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 123dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NumberExprAST(double val) : Val(val) {} 124dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 125dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 126dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 127dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// VariableExprAST - Expression class for referencing a variable, like "a". 128dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass VariableExprAST : public ExprAST { 129dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string Name; 130dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 131dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor VariableExprAST(const std::string &name) : Name(name) {} 132dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor const std::string &getName() const { return Name; } 133dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 134dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 135dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 136dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// UnaryExprAST - Expression class for a unary operator. 137dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass UnaryExprAST : public ExprAST { 138dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor char Opcode; 139dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Operand; 140dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 141dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor UnaryExprAST(char opcode, ExprAST *operand) 142dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : Opcode(opcode), Operand(operand) {} 143dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 144dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 145dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 146dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// BinaryExprAST - Expression class for a binary operator. 147dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass BinaryExprAST : public ExprAST { 148dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor char Op; 149dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *LHS, *RHS; 150dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 151dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinaryExprAST(char op, ExprAST *lhs, ExprAST *rhs) 152dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : Op(op), LHS(lhs), RHS(rhs) {} 153dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 154dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 155dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 156dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// CallExprAST - Expression class for function calls. 157dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass CallExprAST : public ExprAST { 158dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string Callee; 159dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<ExprAST*> Args; 160dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 161dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor CallExprAST(const std::string &callee, std::vector<ExprAST*> &args) 162dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : Callee(callee), Args(args) {} 163dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 164dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 165dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 166dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// IfExprAST - Expression class for if/then/else. 167dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass IfExprAST : public ExprAST { 168dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Cond, *Then, *Else; 169dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 170dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor IfExprAST(ExprAST *cond, ExprAST *then, ExprAST *_else) 171dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : Cond(cond), Then(then), Else(_else) {} 172dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 173dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 174dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 175dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ForExprAST - Expression class for for/in. 176dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass ForExprAST : public ExprAST { 177dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string VarName; 178dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Start, *End, *Step, *Body; 179dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 180dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ForExprAST(const std::string &varname, ExprAST *start, ExprAST *end, 181dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *step, ExprAST *body) 182dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : VarName(varname), Start(start), End(end), Step(step), Body(body) {} 183dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 184dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 185dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 186dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// VarExprAST - Expression class for var/in 187dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass VarExprAST : public ExprAST { 188dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<std::pair<std::string, ExprAST*> > VarNames; 189dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Body; 190dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 191dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor VarExprAST(const std::vector<std::pair<std::string, ExprAST*> > &varnames, 192dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *body) 193dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : VarNames(varnames), Body(body) {} 194dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 195dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 196dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 197dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 198dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// PrototypeAST - This class represents the "prototype" for a function, 199dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// which captures its argument names as well as if it is an operator. 200dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass PrototypeAST { 201dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string Name; 202dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<std::string> Args; 203dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor bool isOperator; 204dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor unsigned Precedence; // Precedence if a binary op. 205dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 206dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PrototypeAST(const std::string &name, const std::vector<std::string> &args, 207dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor bool isoperator = false, unsigned prec = 0) 208dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : Name(name), Args(args), isOperator(isoperator), Precedence(prec) {} 209dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 210dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor bool isUnaryOp() const { return isOperator && Args.size() == 1; } 211dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor bool isBinaryOp() const { return isOperator && Args.size() == 2; } 212dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 213dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor char getOperatorName() const { 214dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor assert(isUnaryOp() || isBinaryOp()); 215dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Name[Name.size()-1]; 216dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 217dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 218dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor unsigned getBinaryPrecedence() const { return Precedence; } 219dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 220dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *Codegen(); 221dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 222dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor void CreateArgumentAllocas(Function *F); 223dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 224dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 225dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// FunctionAST - This class represents a function definition itself. 226dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass FunctionAST { 227dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PrototypeAST *Proto; 228dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Body; 229dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 230dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FunctionAST(PrototypeAST *proto, ExprAST *body) 231dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : Proto(proto), Body(body) {} 232dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 233dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *Codegen(); 234dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 235dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 236dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 237dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// Parser 238dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 239dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 240dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// CurTok/getNextToken - Provide a simple token buffer. CurTok is the current 241dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// token the parser is looking at. getNextToken reads another token from the 242dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// lexer and updates CurTok with its results. 243dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic int CurTok; 244dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic int getNextToken() { 245dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return CurTok = gettok(); 246dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 247dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 248dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// BinopPrecedence - This holds the precedence for each binary operator that is 249dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// defined. 250dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic std::map<char, int> BinopPrecedence; 251dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 252dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// GetTokPrecedence - Get the precedence of the pending binary operator token. 253dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic int GetTokPrecedence() { 254dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!isascii(CurTok)) 255dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return -1; 256dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 257dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Make sure it's a declared binop. 258dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor int TokPrec = BinopPrecedence[CurTok]; 259dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (TokPrec <= 0) return -1; 260dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return TokPrec; 261dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 262dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 263dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// Error* - These are little helper functions for error handling. 264dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorExprAST *Error(const char *Str) { fprintf(stderr, "Error: %s\n", Str);return 0;} 265dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorPrototypeAST *ErrorP(const char *Str) { Error(Str); return 0; } 266dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorFunctionAST *ErrorF(const char *Str) { Error(Str); return 0; } 267dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 268dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseExpression(); 269dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 270dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// identifierexpr 271dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= identifier 272dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= identifier '(' expression* ')' 273dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseIdentifierExpr() { 274dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string IdName = IdentifierStr; 275dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 276dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat identifier. 277dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 278dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != '(') // Simple variable ref. 279dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new VariableExprAST(IdName); 280dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 281dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Call. 282dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat ( 283dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<ExprAST*> Args; 284dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != ')') { 285dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (1) { 286dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Arg = ParseExpression(); 287dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!Arg) return 0; 288dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Args.push_back(Arg); 289dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 290dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok == ')') break; 291dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 292dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != ',') 293dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("Expected ')' or ',' in argument list"); 294dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 295dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 296dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 297dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 298dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Eat the ')'. 299dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 300dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 301dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new CallExprAST(IdName, Args); 302dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 303dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 304dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// numberexpr ::= number 305dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseNumberExpr() { 306dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Result = new NumberExprAST(NumVal); 307dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // consume the number 308dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Result; 309dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 310dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 311dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// parenexpr ::= '(' expression ')' 312dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseParenExpr() { 313dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat (. 314dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *V = ParseExpression(); 315dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!V) return 0; 316dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 317dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != ')') 318dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected ')'"); 319dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat ). 320dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return V; 321dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 322dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 323dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ifexpr ::= 'if' expression 'then' expression 'else' expression 324dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseIfExpr() { 325dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat the if. 326dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 327dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // condition. 328dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Cond = ParseExpression(); 329dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!Cond) return 0; 330dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 331dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_then) 332dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected then"); 333dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat the then 334dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 335dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Then = ParseExpression(); 336dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Then == 0) return 0; 337dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 338dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_else) 339dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected else"); 340dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 341dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 342dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 343dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Else = ParseExpression(); 344dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!Else) return 0; 345dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 346dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new IfExprAST(Cond, Then, Else); 347dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 348dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 349dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// forexpr ::= 'for' identifier '=' expr ',' expr (',' expr)? 'in' expression 350dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseForExpr() { 351dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat the for. 352dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 353dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_identifier) 354dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected identifier after for"); 355dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 356dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string IdName = IdentifierStr; 357dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat identifier. 358dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 359dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != '=') 360dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected '=' after for"); 361dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat '='. 362dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 363dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 364dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Start = ParseExpression(); 365dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Start == 0) return 0; 366dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != ',') 367dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected ',' after for start value"); 368dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 369dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 370dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *End = ParseExpression(); 371dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (End == 0) return 0; 372dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 373dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // The step value is optional. 374dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Step = 0; 375dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok == ',') { 376dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 377dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Step = ParseExpression(); 378dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Step == 0) return 0; 379dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 380dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 381dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_in) 382dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected 'in' after for"); 383dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat 'in'. 384dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 385dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Body = ParseExpression(); 386dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Body == 0) return 0; 387dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 388dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new ForExprAST(IdName, Start, End, Step, Body); 389dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 390dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 391dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// varexpr ::= 'var' identifier ('=' expression)? 392dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// (',' identifier ('=' expression)?)* 'in' expression 393dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseVarExpr() { 394dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat the var. 395dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 396dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<std::pair<std::string, ExprAST*> > VarNames; 397dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 398dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // At least one variable name is required. 399dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_identifier) 400dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected identifier after var"); 401dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 402dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (1) { 403dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string Name = IdentifierStr; 404dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat identifier. 405dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 406dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Read the optional initializer. 407dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Init = 0; 408dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok == '=') { 409dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat the '='. 410dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 411dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Init = ParseExpression(); 412dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Init == 0) return 0; 413dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 414dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 415dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor VarNames.push_back(std::make_pair(Name, Init)); 416dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 417dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // End of var list, exit loop. 418dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != ',') break; 419dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat the ','. 420dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 421dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_identifier) 422dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected identifier list after var"); 423dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 424dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 425dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // At this point, we have to have 'in'. 426dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_in) 427dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected 'in' keyword after 'var'"); 428dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat 'in'. 429dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 430dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Body = ParseExpression(); 431dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Body == 0) return 0; 432dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 433dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new VarExprAST(VarNames, Body); 434dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 435dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 436dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// primary 437dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= identifierexpr 438dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= numberexpr 439dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= parenexpr 440dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= ifexpr 441dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= forexpr 442dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= varexpr 443dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParsePrimary() { 444dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor switch (CurTok) { 445dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor default: return Error("unknown token when expecting an expression"); 446dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_identifier: return ParseIdentifierExpr(); 447dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_number: return ParseNumberExpr(); 448dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case '(': return ParseParenExpr(); 449dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_if: return ParseIfExpr(); 450dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_for: return ParseForExpr(); 451dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_var: return ParseVarExpr(); 452dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 453dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 454dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 455dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// unary 456dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= primary 457dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= '!' unary 458dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseUnary() { 459dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If the current token is not an operator, it must be a primary expr. 460dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!isascii(CurTok) || CurTok == '(' || CurTok == ',') 461dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ParsePrimary(); 462dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 463dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If this is a unary operator, read it. 464dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor int Opc = CurTok; 465dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 466dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (ExprAST *Operand = ParseUnary()) 467dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new UnaryExprAST(Opc, Operand); 468dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 469dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 470dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 471dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// binoprhs 472dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= ('+' unary)* 473dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseBinOpRHS(int ExprPrec, ExprAST *LHS) { 474dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If this is a binop, find its precedence. 475dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (1) { 476dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor int TokPrec = GetTokPrecedence(); 477dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 478dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If this is a binop that binds at least as tightly as the current binop, 479dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // consume it, otherwise we are done. 480dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (TokPrec < ExprPrec) 481dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return LHS; 482dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 483dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Okay, we know this is a binop. 484dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor int BinOp = CurTok; 485dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat binop 486dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 487dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Parse the unary expression after the binary operator. 488dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *RHS = ParseUnary(); 489dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!RHS) return 0; 490dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 491dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If BinOp binds less tightly with RHS than the operator after RHS, let 492dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // the pending operator take RHS as its LHS. 493dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor int NextPrec = GetTokPrecedence(); 494dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (TokPrec < NextPrec) { 495dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor RHS = ParseBinOpRHS(TokPrec+1, RHS); 496dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (RHS == 0) return 0; 497dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 498dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 499dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Merge LHS/RHS. 500dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor LHS = new BinaryExprAST(BinOp, LHS, RHS); 501dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 502dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 503dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 504dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// expression 505dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= unary binoprhs 506dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// 507dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseExpression() { 508dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *LHS = ParseUnary(); 509dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!LHS) return 0; 510dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 511dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ParseBinOpRHS(0, LHS); 512dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 513dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 514dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// prototype 515dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= id '(' id* ')' 516dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= binary LETTER number? (id, id) 517dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= unary LETTER (id) 518dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic PrototypeAST *ParsePrototype() { 519dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string FnName; 520dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 521dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor unsigned Kind = 0; // 0 = identifier, 1 = unary, 2 = binary. 522dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor unsigned BinaryPrecedence = 30; 523dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 524dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor switch (CurTok) { 525dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor default: 526dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Expected function name in prototype"); 527dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_identifier: 528dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FnName = IdentifierStr; 529dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Kind = 0; 530dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 531dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor break; 532dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_unary: 533dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 534dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!isascii(CurTok)) 535dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Expected unary operator"); 536dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FnName = "unary"; 537dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FnName += (char)CurTok; 538dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Kind = 1; 539dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 540dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor break; 541dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_binary: 542dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 543dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!isascii(CurTok)) 544dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Expected binary operator"); 545dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FnName = "binary"; 546dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FnName += (char)CurTok; 547dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Kind = 2; 548dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 549dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 550dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Read the precedence if present. 551dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok == tok_number) { 552dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (NumVal < 1 || NumVal > 100) 553dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Invalid precedecnce: must be 1..100"); 554dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinaryPrecedence = (unsigned)NumVal; 555dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 556dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 557dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor break; 558dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 559dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 560dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != '(') 561dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Expected '(' in prototype"); 562dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 563dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<std::string> ArgNames; 564dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (getNextToken() == tok_identifier) 565dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ArgNames.push_back(IdentifierStr); 566dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != ')') 567dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Expected ')' in prototype"); 568dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 569dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // success. 570dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat ')'. 571dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 572dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Verify right number of names for operator. 573dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Kind && ArgNames.size() != Kind) 574dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Invalid number of operands for operator"); 575dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 576dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new PrototypeAST(FnName, ArgNames, Kind != 0, BinaryPrecedence); 577dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 578dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 579dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// definition ::= 'def' prototype expression 580dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic FunctionAST *ParseDefinition() { 581dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat def. 582dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PrototypeAST *Proto = ParsePrototype(); 583dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Proto == 0) return 0; 584dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 585dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (ExprAST *E = ParseExpression()) 586dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new FunctionAST(Proto, E); 587dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 588dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 589dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 590dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// toplevelexpr ::= expression 591dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic FunctionAST *ParseTopLevelExpr() { 592dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (ExprAST *E = ParseExpression()) { 593dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Make an anonymous proto. 594dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PrototypeAST *Proto = new PrototypeAST("", std::vector<std::string>()); 595dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new FunctionAST(Proto, E); 596dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 597dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 598dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 599dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 600dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// external ::= 'extern' prototype 601dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic PrototypeAST *ParseExtern() { 602dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat extern. 603dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ParsePrototype(); 604dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 605dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 606dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 607dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// Code Generation 608dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 609dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 610dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic Module *TheModule; 611dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic FunctionPassManager *TheFPM; 612dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic IRBuilder<> Builder(getGlobalContext()); 613dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic std::map<std::string, AllocaInst*> NamedValues; 614dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 615dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *ErrorV(const char *Str) { Error(Str); return 0; } 616dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 617dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// CreateEntryBlockAlloca - Create an alloca instruction in the entry block of 618dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// the function. This is used for mutable variables etc. 619dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic AllocaInst *CreateEntryBlockAlloca(Function *TheFunction, 620dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor const std::string &VarName) { 621dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor IRBuilder<> TmpB(&TheFunction->getEntryBlock(), 622dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheFunction->getEntryBlock().begin()); 623dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return TmpB.CreateAlloca(Type::getDoubleTy(getGlobalContext()), 0, 624dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor VarName.c_str()); 625dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 626dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 627dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *NumberExprAST::Codegen() { 628dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ConstantFP::get(getGlobalContext(), APFloat(Val)); 629dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 630dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 631dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *VariableExprAST::Codegen() { 632dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Look this variable up in the function. 633dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *V = NamedValues[Name]; 634dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (V == 0) return ErrorV("Unknown variable name"); 635dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 636dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Load the value. 637dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Builder.CreateLoad(V, Name.c_str()); 638dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 639dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 640dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *UnaryExprAST::Codegen() { 641dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *OperandV = Operand->Codegen(); 642dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (OperandV == 0) return 0; 643dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifdef USE_MCJIT 644dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *F = TheHelper->getFunction(MakeLegalFunctionName(std::string("unary")+Opcode)); 645dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#else 646dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *F = TheModule->getFunction(std::string("unary")+Opcode); 647dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 648dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (F == 0) 649dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorV("Unknown unary operator"); 650dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 651dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Builder.CreateCall(F, OperandV, "unop"); 652dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 653dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 654dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *BinaryExprAST::Codegen() { 655dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Special case '=' because we don't want to emit the LHS as an expression. 656dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Op == '=') { 657dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Assignment requires the LHS to be an identifier. 658dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor VariableExprAST *LHSE = dynamic_cast<VariableExprAST*>(LHS); 659dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!LHSE) 660dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorV("destination of '=' must be a variable"); 661dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Codegen the RHS. 662dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *Val = RHS->Codegen(); 663dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Val == 0) return 0; 664dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 665dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Look up the name. 666dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *Variable = NamedValues[LHSE->getName()]; 667dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Variable == 0) return ErrorV("Unknown variable name"); 668dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 669dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateStore(Val, Variable); 670dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Val; 671dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 672dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 673dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *L = LHS->Codegen(); 674dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *R = RHS->Codegen(); 675dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (L == 0 || R == 0) return 0; 676dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 677dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor switch (Op) { 678dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case '+': return Builder.CreateFAdd(L, R, "addtmp"); 679dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case '-': return Builder.CreateFSub(L, R, "subtmp"); 680dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case '*': return Builder.CreateFMul(L, R, "multmp"); 681dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case '/': return Builder.CreateFDiv(L, R, "divtmp"); 682dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case '<': 683dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor L = Builder.CreateFCmpULT(L, R, "cmptmp"); 684dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Convert bool 0/1 to double 0.0 or 1.0 685dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Builder.CreateUIToFP(L, Type::getDoubleTy(getGlobalContext()), 686dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor "booltmp"); 687dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor default: break; 688dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 689dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 690dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If it wasn't a builtin binary operator, it must be a user defined one. Emit 691dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // a call to it. 692dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *F = TheModule->getFunction(std::string("binary")+Op); 693dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor assert(F && "binary operator not found!"); 694dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 695dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *Ops[] = { L, R }; 696dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Builder.CreateCall(F, Ops, "binop"); 697dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 698dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 699dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *CallExprAST::Codegen() { 700dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Look up the name in the global module table. 701dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *CalleeF = TheModule->getFunction(Callee); 702dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CalleeF == 0) { 703dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor char error_str[64]; 704dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor sprintf(error_str, "Unknown function referenced %s", Callee.c_str()); 705dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorV(error_str); 706dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 707dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 708dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If argument mismatch error. 709dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CalleeF->arg_size() != Args.size()) 710dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorV("Incorrect # arguments passed"); 711dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 712dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<Value*> ArgsV; 713dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (unsigned i = 0, e = Args.size(); i != e; ++i) { 714dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ArgsV.push_back(Args[i]->Codegen()); 715dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (ArgsV.back() == 0) return 0; 716dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 717dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 718dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Builder.CreateCall(CalleeF, ArgsV, "calltmp"); 719dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 720dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 721dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *IfExprAST::Codegen() { 722dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *CondV = Cond->Codegen(); 723dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CondV == 0) return 0; 724dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 725dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Convert condition to a bool by comparing equal to 0.0. 726dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor CondV = Builder.CreateFCmpONE(CondV, 727dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ConstantFP::get(getGlobalContext(), APFloat(0.0)), 728dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor "ifcond"); 729dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 730dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *TheFunction = Builder.GetInsertBlock()->getParent(); 731dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 732dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Create blocks for the then and else cases. Insert the 'then' block at the 733dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // end of the function. 734dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BasicBlock *ThenBB = BasicBlock::Create(getGlobalContext(), "then", TheFunction); 735dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BasicBlock *ElseBB = BasicBlock::Create(getGlobalContext(), "else"); 736dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BasicBlock *MergeBB = BasicBlock::Create(getGlobalContext(), "ifcont"); 737dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 738dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateCondBr(CondV, ThenBB, ElseBB); 739dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 740dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit then value. 741dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.SetInsertPoint(ThenBB); 742dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 743dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *ThenV = Then->Codegen(); 744dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (ThenV == 0) return 0; 745dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 746dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateBr(MergeBB); 747dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Codegen of 'Then' can change the current block, update ThenBB for the PHI. 748dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ThenBB = Builder.GetInsertBlock(); 749dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 750dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit else block. 751dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheFunction->getBasicBlockList().push_back(ElseBB); 752dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.SetInsertPoint(ElseBB); 753dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 754dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *ElseV = Else->Codegen(); 755dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (ElseV == 0) return 0; 756dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 757dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateBr(MergeBB); 758dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Codegen of 'Else' can change the current block, update ElseBB for the PHI. 759dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ElseBB = Builder.GetInsertBlock(); 760dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 761dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit merge block. 762dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheFunction->getBasicBlockList().push_back(MergeBB); 763dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.SetInsertPoint(MergeBB); 764dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PHINode *PN = Builder.CreatePHI(Type::getDoubleTy(getGlobalContext()), 2, 765dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor "iftmp"); 766dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 767dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PN->addIncoming(ThenV, ThenBB); 768dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PN->addIncoming(ElseV, ElseBB); 769dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return PN; 770dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 771dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 772dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *ForExprAST::Codegen() { 773dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Output this as: 774dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // var = alloca double 775dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // ... 776dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // start = startexpr 777dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // store start -> var 778dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // goto loop 779dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // loop: 780dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // ... 781dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // bodyexpr 782dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // ... 783dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // loopend: 784dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // step = stepexpr 785dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // endcond = endexpr 786dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // 787dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // curvar = load var 788dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // nextvar = curvar + step 789dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // store nextvar -> var 790dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // br endcond, loop, endloop 791dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // outloop: 792dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 793dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *TheFunction = Builder.GetInsertBlock()->getParent(); 794dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 795dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Create an alloca for the variable in the entry block. 796dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor AllocaInst *Alloca = CreateEntryBlockAlloca(TheFunction, VarName); 797dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 798dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit the start code first, without 'variable' in scope. 799dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *StartVal = Start->Codegen(); 800dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (StartVal == 0) return 0; 801dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 802dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Store the value into the alloca. 803dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateStore(StartVal, Alloca); 804dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 805dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Make the new basic block for the loop header, inserting after current 806dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // block. 807dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BasicBlock *LoopBB = BasicBlock::Create(getGlobalContext(), "loop", TheFunction); 808dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 809dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Insert an explicit fall through from the current block to the LoopBB. 810dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateBr(LoopBB); 811dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 812dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Start insertion in LoopBB. 813dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.SetInsertPoint(LoopBB); 814dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 815dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Within the loop, the variable is defined equal to the PHI node. If it 816dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // shadows an existing variable, we have to restore it, so save it now. 817dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor AllocaInst *OldVal = NamedValues[VarName]; 818dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues[VarName] = Alloca; 819dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 820dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit the body of the loop. This, like any other expr, can change the 821dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // current BB. Note that we ignore the value computed by the body, but don't 822dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // allow an error. 823dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Body->Codegen() == 0) 824dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 825dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 826dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit the step value. 827dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *StepVal; 828dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Step) { 829dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor StepVal = Step->Codegen(); 830dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (StepVal == 0) return 0; 831dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } else { 832dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If not specified, use 1.0. 833dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor StepVal = ConstantFP::get(getGlobalContext(), APFloat(1.0)); 834dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 835dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 836dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Compute the end condition. 837dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *EndCond = End->Codegen(); 838dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (EndCond == 0) return EndCond; 839dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 840dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Reload, increment, and restore the alloca. This handles the case where 841dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // the body of the loop mutates the variable. 842dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *CurVar = Builder.CreateLoad(Alloca, VarName.c_str()); 843dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *NextVar = Builder.CreateFAdd(CurVar, StepVal, "nextvar"); 844dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateStore(NextVar, Alloca); 845dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 846dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Convert condition to a bool by comparing equal to 0.0. 847dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor EndCond = Builder.CreateFCmpONE(EndCond, 848dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ConstantFP::get(getGlobalContext(), APFloat(0.0)), 849dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor "loopcond"); 850dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 851dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Create the "after loop" block and insert it. 852dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BasicBlock *AfterBB = BasicBlock::Create(getGlobalContext(), "afterloop", TheFunction); 853dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 854dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Insert the conditional branch into the end of LoopEndBB. 855dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateCondBr(EndCond, LoopBB, AfterBB); 856dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 857dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Any new code will be inserted in AfterBB. 858dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.SetInsertPoint(AfterBB); 859dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 860dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Restore the unshadowed variable. 861dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (OldVal) 862dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues[VarName] = OldVal; 863dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor else 864dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues.erase(VarName); 865dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 866dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 867dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // for expr always returns 0.0. 868dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Constant::getNullValue(Type::getDoubleTy(getGlobalContext())); 869dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 870dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 871dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *VarExprAST::Codegen() { 872dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<AllocaInst *> OldBindings; 873dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 874dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *TheFunction = Builder.GetInsertBlock()->getParent(); 875dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 876dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Register all variables and emit their initializer. 877dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (unsigned i = 0, e = VarNames.size(); i != e; ++i) { 878dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor const std::string &VarName = VarNames[i].first; 879dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Init = VarNames[i].second; 880dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 881dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit the initializer before adding the variable to scope, this prevents 882dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // the initializer from referencing the variable itself, and permits stuff 883dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // like this: 884dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // var a = 1 in 885dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // var a = a in ... # refers to outer 'a'. 886dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *InitVal; 887dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Init) { 888dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor InitVal = Init->Codegen(); 889dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (InitVal == 0) return 0; 890dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } else { // If not specified, use 0.0. 891dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor InitVal = ConstantFP::get(getGlobalContext(), APFloat(0.0)); 892dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 893dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 894dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor AllocaInst *Alloca = CreateEntryBlockAlloca(TheFunction, VarName); 895dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateStore(InitVal, Alloca); 896dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 897dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Remember the old variable binding so that we can restore the binding when 898dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // we unrecurse. 899dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OldBindings.push_back(NamedValues[VarName]); 900dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 901dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Remember this binding. 902dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues[VarName] = Alloca; 903dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 904dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 905dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Codegen the body, now that all vars are in scope. 906dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *BodyVal = Body->Codegen(); 907dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (BodyVal == 0) return 0; 908dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 909dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Pop all our variables from scope. 910dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (unsigned i = 0, e = VarNames.size(); i != e; ++i) 911dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues[VarNames[i].first] = OldBindings[i]; 912dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 913dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Return the body computation. 914dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return BodyVal; 915dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 916dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 917dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorFunction *PrototypeAST::Codegen() { 918dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Make the function type: double(double,double) etc. 919dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<Type*> Doubles(Args.size(), 920dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Type::getDoubleTy(getGlobalContext())); 921dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FunctionType *FT = FunctionType::get(Type::getDoubleTy(getGlobalContext()), 922dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Doubles, false); 923dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 924dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *F = Function::Create(FT, Function::ExternalLinkage, Name, TheModule); 925dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If F conflicted, there was already something named 'Name'. If it has a 926dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // body, don't allow redefinition or reextern. 927dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (F->getName() != Name) { 928dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Delete the one we just made and get the existing one. 929dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor F->eraseFromParent(); 930dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor F = TheModule->getFunction(Name); 931dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If F already has a body, reject this. 932dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!F->empty()) { 933dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ErrorF("redefinition of function"); 934dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 935dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 936dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If F took a different number of args, reject. 937dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (F->arg_size() != Args.size()) { 938dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ErrorF("redefinition of function with different # args"); 939dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 940dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 941dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 942dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 943dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Set names for all arguments. 944dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor unsigned Idx = 0; 945dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (Function::arg_iterator AI = F->arg_begin(); Idx != Args.size(); 946dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ++AI, ++Idx) 947dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor AI->setName(Args[Idx]); 948dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 949dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return F; 950dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 951dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 952dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// CreateArgumentAllocas - Create an alloca for each argument and register the 953dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// argument in the symbol table so that references to it will succeed. 954dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorvoid PrototypeAST::CreateArgumentAllocas(Function *F) { 955dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function::arg_iterator AI = F->arg_begin(); 956dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (unsigned Idx = 0, e = Args.size(); Idx != e; ++Idx, ++AI) { 957dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Create an alloca for this variable. 958dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor AllocaInst *Alloca = CreateEntryBlockAlloca(F, Args[Idx]); 959dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 960dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Store the initial value into the alloca. 961dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateStore(AI, Alloca); 962dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 963dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Add arguments to variable symbol table. 964dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues[Args[Idx]] = Alloca; 965dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 966dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 967dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 968dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorFunction *FunctionAST::Codegen() { 969dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues.clear(); 970dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 971dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *TheFunction = Proto->Codegen(); 972dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (TheFunction == 0) 973dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 974dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 975dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If this is an operator, install it. 976dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Proto->isBinaryOp()) 977dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence[Proto->getOperatorName()] = Proto->getBinaryPrecedence(); 978dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 979dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Create a new basic block to start insertion into. 980dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BasicBlock *BB = BasicBlock::Create(getGlobalContext(), "entry", TheFunction); 981dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.SetInsertPoint(BB); 982dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 983dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Add all arguments to the symbol table and create their allocas. 984dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Proto->CreateArgumentAllocas(TheFunction); 985dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 986dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Value *RetVal = Body->Codegen()) { 987dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Finish off the function. 988dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateRet(RetVal); 989dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 990dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Validate the generated code, checking for consistency. 991dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor verifyFunction(*TheFunction); 992dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 993dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Optimize the function. 994dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheFPM->run(*TheFunction); 995dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 996dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return TheFunction; 997dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 998dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 999dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Error reading body, remove function. 1000dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheFunction->eraseFromParent(); 1001dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1002dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Proto->isBinaryOp()) 1003dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence.erase(Proto->getOperatorName()); 1004dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 1005dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1006dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1007dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 1008dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// Top-Level parsing and JIT Driver 1009dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 1010dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1011dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExecutionEngine *TheExecutionEngine; 1012dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1013dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic void HandleDefinition() { 1014dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (FunctionAST *F = ParseDefinition()) { 1015dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Function *LF = F->Codegen()) { 1016dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifndef MINIMAL_STDERR_OUTPUT 1017dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor fprintf(stderr, "Read function definition:"); 1018dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor LF->dump(); 1019dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 1020dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1021dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } else { 1022dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Skip token for error recovery. 1023dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 1024dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1025dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1026dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1027dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic void HandleExtern() { 1028dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (PrototypeAST *P = ParseExtern()) { 1029dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Function *F = P->Codegen()) { 1030dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifndef MINIMAL_STDERR_OUTPUT 1031dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor fprintf(stderr, "Read extern: "); 1032dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor F->dump(); 1033dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 1034dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1035dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } else { 1036dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Skip token for error recovery. 1037dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 1038dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1039dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1040dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1041dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic void HandleTopLevelExpression() { 1042dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Evaluate a top-level expression into an anonymous function. 1043dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (FunctionAST *F = ParseTopLevelExpr()) { 1044dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Function *LF = F->Codegen()) { 1045dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // JIT the function, returning a function pointer. 1046dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor void *FPtr = TheExecutionEngine->getPointerToFunction(LF); 1047dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Cast it to the right type (takes no arguments, returns a double) so we 1048dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // can call it as a native function. 1049dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor double (*FP)() = (double (*)())(intptr_t)FPtr; 1050dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifdef MINIMAL_STDERR_OUTPUT 1051dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FP(); 1052dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#else 1053dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor fprintf(stderr, "Evaluated to %f\n", FP()); 1054dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 1055dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1056dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } else { 1057dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Skip token for error recovery. 1058dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 1059dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1060dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1061dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1062dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// top ::= definition | external | expression | ';' 1063dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic void MainLoop() { 1064dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (1) { 1065dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifndef MINIMAL_STDERR_OUTPUT 1066dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor fprintf(stderr, "ready> "); 1067dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 1068dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor switch (CurTok) { 1069dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_eof: return; 1070dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case ';': getNextToken(); break; // ignore top-level semicolons. 1071dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_def: HandleDefinition(); break; 1072dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_extern: HandleExtern(); break; 1073dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor default: HandleTopLevelExpression(); break; 1074dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1075dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1076dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1077dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1078dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 1079dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// "Library" functions that can be "extern'd" from user code. 1080dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 1081dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1082dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// putchard - putchar that takes a double and returns 0. 1083dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorextern "C" 1084dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylordouble putchard(double X) { 1085dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor putchar((char)X); 1086dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 1087dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1088dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1089dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// printd - printf that takes a double prints it as "%f\n", returning 0. 1090dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorextern "C" 1091dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylordouble printd(double X) { 1092dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor printf("%f", X); 1093dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 1094dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1095dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1096dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorextern "C" 1097dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylordouble printlf() { 1098dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor printf("\n"); 1099dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 1100dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1101dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1102dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 1103dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// Main driver code. 1104dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 1105dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1106dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorint main(int argc, char **argv) { 1107dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor InitializeNativeTarget(); 1108dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor LLVMContext &Context = getGlobalContext(); 1109dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1110dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Install standard binary operators. 1111dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // 1 is lowest precedence. 1112dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence['='] = 2; 1113dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence['<'] = 10; 1114dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence['+'] = 20; 1115dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence['-'] = 20; 1116dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence['/'] = 40; 1117dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence['*'] = 40; // highest. 1118dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1119dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Make the module, which holds all the code. 1120dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheModule = new Module("my cool jit", Context); 1121dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1122dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Create the JIT. This takes ownership of the module. 1123dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string ErrStr; 1124dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheExecutionEngine = EngineBuilder(TheModule).setErrorStr(&ErrStr).create(); 1125dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!TheExecutionEngine) { 1126dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor fprintf(stderr, "Could not create ExecutionEngine: %s\n", ErrStr.c_str()); 1127dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor exit(1); 1128dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1129dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1130dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FunctionPassManager OurFPM(TheModule); 1131dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1132dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Set up the optimizer pipeline. Start with registering info about how the 1133dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // target lays out data structures. 1134dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OurFPM.add(new DataLayout(*TheExecutionEngine->getDataLayout())); 1135dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Provide basic AliasAnalysis support for GVN. 1136dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OurFPM.add(createBasicAliasAnalysisPass()); 1137dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Promote allocas to registers. 1138dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OurFPM.add(createPromoteMemoryToRegisterPass()); 1139dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Do simple "peephole" optimizations and bit-twiddling optzns. 1140dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OurFPM.add(createInstructionCombiningPass()); 1141dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Reassociate expressions. 1142dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OurFPM.add(createReassociatePass()); 1143dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Eliminate Common SubExpressions. 1144dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OurFPM.add(createGVNPass()); 1145dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Simplify the control flow graph (deleting unreachable blocks, etc). 1146dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OurFPM.add(createCFGSimplificationPass()); 1147dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1148dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OurFPM.doInitialization(); 1149dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1150dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Set the global so the code gen can use this. 1151dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheFPM = &OurFPM; 1152dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1153dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Prime the first token. 1154dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifndef MINIMAL_STDERR_OUTPUT 1155dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor fprintf(stderr, "ready> "); 1156dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 1157dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 1158dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1159dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Run the main "interpreter loop" now. 1160dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor MainLoop(); 1161dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1162dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Print out all of the generated code. 1163dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheFPM = 0; 1164dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifndef MINIMAL_STDERR_OUTPUT 1165dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheModule->dump(); 1166dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 1167dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 1168dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1169