1dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/Analysis/Passes.h" 2dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/ExecutionEngine/ExecutionEngine.h" 3dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/ExecutionEngine/MCJIT.h" 4dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/ExecutionEngine/SectionMemoryManager.h" 5dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/IR/DataLayout.h" 6dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/IR/DerivedTypes.h" 7dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/IR/IRBuilder.h" 8dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/IR/LLVMContext.h" 9ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines#include "llvm/IR/LegacyPassManager.h" 10dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/IR/Module.h" 1136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines#include "llvm/IR/Verifier.h" 12dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/Support/TargetSelect.h" 13dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include "llvm/Transforms/Scalar.h" 14e3ba15c794839abe076e3e2bdf6c626396a19d4dWill Dietz#include <cctype> 15dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include <cstdio> 16dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include <map> 17dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include <string> 18dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#include <vector> 19dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorusing namespace llvm; 20dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 21dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 22dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// Lexer 23dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 24dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 25dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// The lexer returns tokens [0-255] if it is an unknown character, otherwise one 26dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// of these for known things. 27dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorenum Token { 28dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_eof = -1, 29dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 30dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // commands 31dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_def = -2, tok_extern = -3, 32dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 33dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // primary 34dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_identifier = -4, tok_number = -5, 35ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 36dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // control 37dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_if = -6, tok_then = -7, tok_else = -8, 38dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_for = -9, tok_in = -10, 39ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 40dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // operators 41dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_binary = -11, tok_unary = -12, 42ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 43dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // var definition 44dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor tok_var = -13 45dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 46dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 47dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic std::string IdentifierStr; // Filled in if tok_identifier 48dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic double NumVal; // Filled in if tok_number 49dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 50dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// gettok - Return the next token from standard input. 51dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic int gettok() { 52dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor static int LastChar = ' '; 53dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 54dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Skip any whitespace. 55dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (isspace(LastChar)) 56dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor LastChar = getchar(); 57dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 58dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (isalpha(LastChar)) { // identifier: [a-zA-Z][a-zA-Z0-9]* 59dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor IdentifierStr = LastChar; 60dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (isalnum((LastChar = getchar()))) 61dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor IdentifierStr += LastChar; 62dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 63dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "def") return tok_def; 64dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "extern") return tok_extern; 65dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "if") return tok_if; 66dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "then") return tok_then; 67dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "else") return tok_else; 68dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "for") return tok_for; 69dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "in") return tok_in; 70dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "binary") return tok_binary; 71dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "unary") return tok_unary; 72dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (IdentifierStr == "var") return tok_var; 73dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return tok_identifier; 74dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 75dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 76dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (isdigit(LastChar) || LastChar == '.') { // Number: [0-9.]+ 77dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string NumStr; 78dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor do { 79dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NumStr += LastChar; 80dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor LastChar = getchar(); 81dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } while (isdigit(LastChar) || LastChar == '.'); 82dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 83dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NumVal = strtod(NumStr.c_str(), 0); 84dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return tok_number; 85dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 86dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 87dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (LastChar == '#') { 88dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Comment until end of line. 89dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor do LastChar = getchar(); 90dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (LastChar != EOF && LastChar != '\n' && LastChar != '\r'); 91ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 92dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (LastChar != EOF) 93dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return gettok(); 94dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 95ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 96dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Check for end of file. Don't eat the EOF. 97dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (LastChar == EOF) 98dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return tok_eof; 99dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 100dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Otherwise, just return the character as its ascii value. 101dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor int ThisChar = LastChar; 102dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor LastChar = getchar(); 103dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ThisChar; 104dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 105dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 106dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 107dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// Abstract Syntax Tree (aka Parse Tree) 108dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 109dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 110dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ExprAST - Base class for all expression nodes. 111dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass ExprAST { 112dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 113dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual ~ExprAST() {} 114dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen() = 0; 115dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 116dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 117dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// NumberExprAST - Expression class for numeric literals like "1.0". 118dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass NumberExprAST : public ExprAST { 119dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor double Val; 120dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 121dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NumberExprAST(double val) : Val(val) {} 122dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 123dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 124dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 125dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// VariableExprAST - Expression class for referencing a variable, like "a". 126dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass VariableExprAST : public ExprAST { 127dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string Name; 128dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 129dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor VariableExprAST(const std::string &name) : Name(name) {} 130dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor const std::string &getName() const { return Name; } 131dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 132dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 133dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 134dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// UnaryExprAST - Expression class for a unary operator. 135dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass UnaryExprAST : public ExprAST { 136dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor char Opcode; 137dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Operand; 138dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 139ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines UnaryExprAST(char opcode, ExprAST *operand) 140dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : Opcode(opcode), Operand(operand) {} 141dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 142dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 143dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 144dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// BinaryExprAST - Expression class for a binary operator. 145dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass BinaryExprAST : public ExprAST { 146dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor char Op; 147dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *LHS, *RHS; 148dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 149ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines BinaryExprAST(char op, ExprAST *lhs, ExprAST *rhs) 150dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : Op(op), LHS(lhs), RHS(rhs) {} 151dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 152dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 153dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 154dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// CallExprAST - Expression class for function calls. 155dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass CallExprAST : public ExprAST { 156dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string Callee; 157dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<ExprAST*> Args; 158dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 159dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor CallExprAST(const std::string &callee, std::vector<ExprAST*> &args) 160dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : Callee(callee), Args(args) {} 161dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 162dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 163dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 164dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// IfExprAST - Expression class for if/then/else. 165dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass IfExprAST : public ExprAST { 166dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Cond, *Then, *Else; 167dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 168dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor IfExprAST(ExprAST *cond, ExprAST *then, ExprAST *_else) 169dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : Cond(cond), Then(then), Else(_else) {} 170dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 171dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 172dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 173dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ForExprAST - Expression class for for/in. 174dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass ForExprAST : public ExprAST { 175dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string VarName; 176dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Start, *End, *Step, *Body; 177dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 178dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ForExprAST(const std::string &varname, ExprAST *start, ExprAST *end, 179dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *step, ExprAST *body) 180dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : VarName(varname), Start(start), End(end), Step(step), Body(body) {} 181dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 182dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 183dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 184dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// VarExprAST - Expression class for var/in 185dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass VarExprAST : public ExprAST { 186dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<std::pair<std::string, ExprAST*> > VarNames; 187dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Body; 188dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 189dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor VarExprAST(const std::vector<std::pair<std::string, ExprAST*> > &varnames, 190dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *body) 191dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : VarNames(varnames), Body(body) {} 192ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 193dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual Value *Codegen(); 194dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 195dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 196dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// PrototypeAST - This class represents the "prototype" for a function, 197dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// which captures its argument names as well as if it is an operator. 198dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass PrototypeAST { 199dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string Name; 200dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<std::string> Args; 201dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor bool isOperator; 202dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor unsigned Precedence; // Precedence if a binary op. 203dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 204dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PrototypeAST(const std::string &name, const std::vector<std::string> &args, 205dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor bool isoperator = false, unsigned prec = 0) 206dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : Name(name), Args(args), isOperator(isoperator), Precedence(prec) {} 207ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 208dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor bool isUnaryOp() const { return isOperator && Args.size() == 1; } 209dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor bool isBinaryOp() const { return isOperator && Args.size() == 2; } 210ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 211dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor char getOperatorName() const { 212dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor assert(isUnaryOp() || isBinaryOp()); 213dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Name[Name.size()-1]; 214dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 215ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 216dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor unsigned getBinaryPrecedence() const { return Precedence; } 217ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 218dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *Codegen(); 219ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 220dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor void CreateArgumentAllocas(Function *F); 221dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 222dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 223dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// FunctionAST - This class represents a function definition itself. 224dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass FunctionAST { 225dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PrototypeAST *Proto; 226dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Body; 227dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 228dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FunctionAST(PrototypeAST *proto, ExprAST *body) 229dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor : Proto(proto), Body(body) {} 230ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 231dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *Codegen(); 232dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 233dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 234dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 235dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// Parser 236dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 237dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 238dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// CurTok/getNextToken - Provide a simple token buffer. CurTok is the current 239dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// token the parser is looking at. getNextToken reads another token from the 240dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// lexer and updates CurTok with its results. 241dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic int CurTok; 242dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic int getNextToken() { 243dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return CurTok = gettok(); 244dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 245dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 246dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// BinopPrecedence - This holds the precedence for each binary operator that is 247dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// defined. 248dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic std::map<char, int> BinopPrecedence; 249dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 250dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// GetTokPrecedence - Get the precedence of the pending binary operator token. 251dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic int GetTokPrecedence() { 252dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!isascii(CurTok)) 253dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return -1; 254ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 255dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Make sure it's a declared binop. 256dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor int TokPrec = BinopPrecedence[CurTok]; 257dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (TokPrec <= 0) return -1; 258dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return TokPrec; 259dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 260dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 261dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// Error* - These are little helper functions for error handling. 262dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorExprAST *Error(const char *Str) { fprintf(stderr, "Error: %s\n", Str);return 0;} 263dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorPrototypeAST *ErrorP(const char *Str) { Error(Str); return 0; } 264dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorFunctionAST *ErrorF(const char *Str) { Error(Str); return 0; } 265dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 266dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseExpression(); 267dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 268dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// identifierexpr 269dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= identifier 270dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= identifier '(' expression* ')' 271dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseIdentifierExpr() { 272dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string IdName = IdentifierStr; 273ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 274dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat identifier. 275ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 276dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != '(') // Simple variable ref. 277dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new VariableExprAST(IdName); 278ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 279dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Call. 280dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat ( 281dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<ExprAST*> Args; 282dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != ')') { 283dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (1) { 284dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Arg = ParseExpression(); 285dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!Arg) return 0; 286dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Args.push_back(Arg); 287dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 288dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok == ')') break; 289dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 290dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != ',') 291dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("Expected ')' or ',' in argument list"); 292dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 293dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 294dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 295dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 296dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Eat the ')'. 297dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 298ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 299dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new CallExprAST(IdName, Args); 300dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 301dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 302dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// numberexpr ::= number 303dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseNumberExpr() { 304dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Result = new NumberExprAST(NumVal); 305dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // consume the number 306dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Result; 307dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 308dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 309dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// parenexpr ::= '(' expression ')' 310dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseParenExpr() { 311dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat (. 312dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *V = ParseExpression(); 313dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!V) return 0; 314ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 315dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != ')') 316dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected ')'"); 317dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat ). 318dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return V; 319dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 320dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 321dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ifexpr ::= 'if' expression 'then' expression 'else' expression 322dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseIfExpr() { 323dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat the if. 324ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 325dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // condition. 326dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Cond = ParseExpression(); 327dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!Cond) return 0; 328ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 329dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_then) 330dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected then"); 331dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat the then 332ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 333dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Then = ParseExpression(); 334dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Then == 0) return 0; 335ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 336dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_else) 337dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected else"); 338ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 339dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 340ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 341dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Else = ParseExpression(); 342dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!Else) return 0; 343ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 344dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new IfExprAST(Cond, Then, Else); 345dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 346dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 347dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// forexpr ::= 'for' identifier '=' expr ',' expr (',' expr)? 'in' expression 348dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseForExpr() { 349dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat the for. 350dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 351dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_identifier) 352dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected identifier after for"); 353ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 354dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string IdName = IdentifierStr; 355dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat identifier. 356ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 357dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != '=') 358dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected '=' after for"); 359dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat '='. 360ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 361ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 362dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Start = ParseExpression(); 363dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Start == 0) return 0; 364dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != ',') 365dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected ',' after for start value"); 366dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 367ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 368dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *End = ParseExpression(); 369dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (End == 0) return 0; 370ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 371dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // The step value is optional. 372dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Step = 0; 373dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok == ',') { 374dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 375dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Step = ParseExpression(); 376dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Step == 0) return 0; 377dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 378ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 379dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_in) 380dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected 'in' after for"); 381dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat 'in'. 382ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 383dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Body = ParseExpression(); 384dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Body == 0) return 0; 385dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 386dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new ForExprAST(IdName, Start, End, Step, Body); 387dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 388dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 389ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines/// varexpr ::= 'var' identifier ('=' expression)? 390dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// (',' identifier ('=' expression)?)* 'in' expression 391dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseVarExpr() { 392dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat the var. 393dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 394dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<std::pair<std::string, ExprAST*> > VarNames; 395dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 396dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // At least one variable name is required. 397dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_identifier) 398dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected identifier after var"); 399ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 400dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (1) { 401dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string Name = IdentifierStr; 402dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat identifier. 403dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 404dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Read the optional initializer. 405dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Init = 0; 406dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok == '=') { 407dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat the '='. 408ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 409dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Init = ParseExpression(); 410dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Init == 0) return 0; 411dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 412ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 413dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor VarNames.push_back(std::make_pair(Name, Init)); 414ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 415dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // End of var list, exit loop. 416dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != ',') break; 417dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat the ','. 418ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 419dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_identifier) 420dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected identifier list after var"); 421dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 422ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 423dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // At this point, we have to have 'in'. 424dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != tok_in) 425dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Error("expected 'in' keyword after 'var'"); 426dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat 'in'. 427ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 428dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Body = ParseExpression(); 429dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Body == 0) return 0; 430ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 431dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new VarExprAST(VarNames, Body); 432dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 433dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 434dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// primary 435dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= identifierexpr 436dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= numberexpr 437dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= parenexpr 438dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= ifexpr 439dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= forexpr 440dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= varexpr 441dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParsePrimary() { 442dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor switch (CurTok) { 443dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor default: return Error("unknown token when expecting an expression"); 444dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_identifier: return ParseIdentifierExpr(); 445dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_number: return ParseNumberExpr(); 446dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case '(': return ParseParenExpr(); 447dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_if: return ParseIfExpr(); 448dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_for: return ParseForExpr(); 449dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_var: return ParseVarExpr(); 450dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 451dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 452dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 453dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// unary 454dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= primary 455dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= '!' unary 456dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseUnary() { 457dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If the current token is not an operator, it must be a primary expr. 458dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!isascii(CurTok) || CurTok == '(' || CurTok == ',') 459dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ParsePrimary(); 460ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 461dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If this is a unary operator, read it. 462dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor int Opc = CurTok; 463dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 464dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (ExprAST *Operand = ParseUnary()) 465dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new UnaryExprAST(Opc, Operand); 466dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 467dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 468dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 469dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// binoprhs 470dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= ('+' unary)* 471dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseBinOpRHS(int ExprPrec, ExprAST *LHS) { 472dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If this is a binop, find its precedence. 473dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (1) { 474dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor int TokPrec = GetTokPrecedence(); 475ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 476dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If this is a binop that binds at least as tightly as the current binop, 477dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // consume it, otherwise we are done. 478dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (TokPrec < ExprPrec) 479dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return LHS; 480ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 481dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Okay, we know this is a binop. 482dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor int BinOp = CurTok; 483dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat binop 484ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 485dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Parse the unary expression after the binary operator. 486dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *RHS = ParseUnary(); 487dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!RHS) return 0; 488ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 489dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If BinOp binds less tightly with RHS than the operator after RHS, let 490dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // the pending operator take RHS as its LHS. 491dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor int NextPrec = GetTokPrecedence(); 492dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (TokPrec < NextPrec) { 493dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor RHS = ParseBinOpRHS(TokPrec+1, RHS); 494dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (RHS == 0) return 0; 495dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 496ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 497dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Merge LHS/RHS. 498dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor LHS = new BinaryExprAST(BinOp, LHS, RHS); 499dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 500dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 501dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 502dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// expression 503dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= unary binoprhs 504dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// 505dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic ExprAST *ParseExpression() { 506dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *LHS = ParseUnary(); 507dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!LHS) return 0; 508ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 509dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ParseBinOpRHS(0, LHS); 510dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 511dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 512dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// prototype 513dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= id '(' id* ')' 514dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= binary LETTER number? (id, id) 515dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// ::= unary LETTER (id) 516dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic PrototypeAST *ParsePrototype() { 517dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string FnName; 518ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 519dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor unsigned Kind = 0; // 0 = identifier, 1 = unary, 2 = binary. 520dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor unsigned BinaryPrecedence = 30; 521ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 522dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor switch (CurTok) { 523dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor default: 524dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Expected function name in prototype"); 525dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_identifier: 526dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FnName = IdentifierStr; 527dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Kind = 0; 528dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 529dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor break; 530dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_unary: 531dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 532dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!isascii(CurTok)) 533dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Expected unary operator"); 534dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FnName = "unary"; 535dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FnName += (char)CurTok; 536dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Kind = 1; 537dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 538dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor break; 539dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_binary: 540dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 541dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!isascii(CurTok)) 542dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Expected binary operator"); 543dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FnName = "binary"; 544dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FnName += (char)CurTok; 545dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Kind = 2; 546dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 547ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 548dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Read the precedence if present. 549dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok == tok_number) { 550dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (NumVal < 1 || NumVal > 100) 551dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Invalid precedecnce: must be 1..100"); 552dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinaryPrecedence = (unsigned)NumVal; 553dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 554dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 555dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor break; 556dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 557ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 558dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != '(') 559dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Expected '(' in prototype"); 560ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 561dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<std::string> ArgNames; 562dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (getNextToken() == tok_identifier) 563dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ArgNames.push_back(IdentifierStr); 564dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CurTok != ')') 565dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Expected ')' in prototype"); 566ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 567dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // success. 568dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat ')'. 569ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 570dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Verify right number of names for operator. 571dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Kind && ArgNames.size() != Kind) 572dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorP("Invalid number of operands for operator"); 573ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 574dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new PrototypeAST(FnName, ArgNames, Kind != 0, BinaryPrecedence); 575dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 576dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 577dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// definition ::= 'def' prototype expression 578dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic FunctionAST *ParseDefinition() { 579dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat def. 580dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PrototypeAST *Proto = ParsePrototype(); 581dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Proto == 0) return 0; 582dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 583dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (ExprAST *E = ParseExpression()) 584dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new FunctionAST(Proto, E); 585dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 586dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 587dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 588dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// toplevelexpr ::= expression 589dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic FunctionAST *ParseTopLevelExpr() { 590dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (ExprAST *E = ParseExpression()) { 591dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Make an anonymous proto. 592dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PrototypeAST *Proto = new PrototypeAST("", std::vector<std::string>()); 593dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return new FunctionAST(Proto, E); 594dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 595dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 596dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 597dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 598dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// external ::= 'extern' prototype 599dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic PrototypeAST *ParseExtern() { 600dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); // eat extern. 601dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ParsePrototype(); 602dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 603dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 604dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 605dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// Quick and dirty hack 606dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 607dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 608dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// FIXME: Obviously we can do better than this 609dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstd::string GenerateUniqueName(const char *root) 610dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor{ 611dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor static int i = 0; 612dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor char s[16]; 613dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor sprintf(s, "%s%d", root, i++); 614dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string S = s; 615dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return S; 616dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 617dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 618dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstd::string MakeLegalFunctionName(std::string Name) 619dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor{ 620dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string NewName; 621dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!Name.length()) 622dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return GenerateUniqueName("anon_func_"); 623dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 624dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Start with what we have 625dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NewName = Name; 626dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 627dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Look for a numberic first character 628dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (NewName.find_first_of("0123456789") == 0) { 629dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NewName.insert(0, 1, 'n'); 630dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 631dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 632dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Replace illegal characters with their ASCII equivalent 633dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string legal_elements = "_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; 634dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor size_t pos; 635dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while ((pos = NewName.find_first_not_of(legal_elements)) != std::string::npos) { 636dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor char old_c = NewName.at(pos); 637dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor char new_str[16]; 638dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor sprintf(new_str, "%d", (int)old_c); 639dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NewName = NewName.replace(pos, 1, new_str); 640dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 641dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 642dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return NewName; 643dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 644dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 645dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 646dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// MCJIT helper class 647dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 648dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 649dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass MCJITHelper 650dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor{ 651dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 652dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor MCJITHelper(LLVMContext& C) : Context(C), OpenModule(NULL) {} 653dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ~MCJITHelper(); 654dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 655dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *getFunction(const std::string FnName); 656dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Module *getModuleForNewFunction(); 657dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor void *getPointerToFunction(Function* F); 658dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor void *getPointerToNamedFunction(const std::string &Name); 659dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor void dump(); 660dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 661dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorprivate: 662dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor typedef std::vector<Module*> ModuleVector; 663dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor typedef std::vector<ExecutionEngine*> EngineVector; 664dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 665dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor LLVMContext &Context; 666dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Module *OpenModule; 667dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ModuleVector Modules; 668dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor EngineVector Engines; 669dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 670dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 671dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorclass HelpingMemoryManager : public SectionMemoryManager 672dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor{ 673ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines HelpingMemoryManager(const HelpingMemoryManager&) = delete; 674ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines void operator=(const HelpingMemoryManager&) = delete; 675dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 676dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorpublic: 677dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor HelpingMemoryManager(MCJITHelper *Helper) : MasterHelper(Helper) {} 678dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual ~HelpingMemoryManager() {} 679dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 680ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines /// This method returns the address of the specified function. 681dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor /// Our implementation will attempt to find functions in other 682dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor /// modules associated with the MCJITHelper to cross link functions 683dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor /// from one generated module to another. 684dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor /// 685dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor /// If \p AbortOnFailure is false and no function with the given name is 686dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor /// found, this function returns a null pointer. Otherwise, it prints a 687dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor /// message to stderr and aborts. 688dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor virtual void *getPointerToNamedFunction(const std::string &Name, 689dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor bool AbortOnFailure = true); 690dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorprivate: 691dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor MCJITHelper *MasterHelper; 692dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor}; 693dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 694dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorvoid *HelpingMemoryManager::getPointerToNamedFunction(const std::string &Name, 695dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor bool AbortOnFailure) 696dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor{ 697dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Try the standard symbol resolution first, but ask it not to abort. 698dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor void *pfn = SectionMemoryManager::getPointerToNamedFunction(Name, false); 699dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (pfn) 700dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return pfn; 701dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 702dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor pfn = MasterHelper->getPointerToNamedFunction(Name); 703dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!pfn && AbortOnFailure) 704dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor report_fatal_error("Program used external function '" + Name + 705dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor "' which could not be resolved!"); 706dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return pfn; 707dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 708dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 709dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorMCJITHelper::~MCJITHelper() 710dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor{ 711dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (OpenModule) 712dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor delete OpenModule; 713dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor EngineVector::iterator begin = Engines.begin(); 714dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor EngineVector::iterator end = Engines.end(); 715dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor EngineVector::iterator it; 716dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (it = begin; it != end; ++it) 717dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor delete *it; 718dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 719dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 720dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorFunction *MCJITHelper::getFunction(const std::string FnName) { 721dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ModuleVector::iterator begin = Modules.begin(); 722dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ModuleVector::iterator end = Modules.end(); 723dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ModuleVector::iterator it; 724dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (it = begin; it != end; ++it) { 725dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *F = (*it)->getFunction(FnName); 726dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (F) { 727dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (*it == OpenModule) 728dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return F; 729dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 730dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor assert(OpenModule != NULL); 731dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 732dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // This function is in a module that has already been JITed. 733dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // We need to generate a new prototype for external linkage. 734dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *PF = OpenModule->getFunction(FnName); 735dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (PF && !PF->empty()) { 736dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ErrorF("redefinition of function across modules"); 737dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 738dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 739dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 740dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If we don't have a prototype yet, create one. 741dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!PF) 742ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines PF = Function::Create(F->getFunctionType(), 743ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines Function::ExternalLinkage, 744ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines FnName, 745dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OpenModule); 746dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return PF; 747dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 748dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 749dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return NULL; 750dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 751dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 752dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorModule *MCJITHelper::getModuleForNewFunction() { 753dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If we have a Module that hasn't been JITed, use that. 754dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (OpenModule) 755dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return OpenModule; 756dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 757dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Otherwise create a new Module. 758dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string ModName = GenerateUniqueName("mcjit_module_"); 759dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Module *M = new Module(ModName, Context); 760dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Modules.push_back(M); 761dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OpenModule = M; 762dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return M; 763dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 764dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 765dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorvoid *MCJITHelper::getPointerToFunction(Function* F) { 766dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // See if an existing instance of MCJIT has this function. 767dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor EngineVector::iterator begin = Engines.begin(); 768dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor EngineVector::iterator end = Engines.end(); 769dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor EngineVector::iterator it; 770dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (it = begin; it != end; ++it) { 771dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor void *P = (*it)->getPointerToFunction(F); 772dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (P) 773dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return P; 774dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 775dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 776dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If we didn't find the function, see if we can generate it. 777dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (OpenModule) { 778dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string ErrStr; 779dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExecutionEngine *NewEngine = EngineBuilder(OpenModule) 780dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor .setErrorStr(&ErrStr) 781dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor .setMCJITMemoryManager(new HelpingMemoryManager(this)) 782dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor .create(); 783dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!NewEngine) { 784dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor fprintf(stderr, "Could not create ExecutionEngine: %s\n", ErrStr.c_str()); 785dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor exit(1); 786dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 787dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 788dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Create a function pass manager for this engine 789dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FunctionPassManager *FPM = new FunctionPassManager(OpenModule); 790dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 791dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Set up the optimizer pipeline. Start with registering info about how the 792dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // target lays out data structures. 793dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FPM->add(new DataLayout(*NewEngine->getDataLayout())); 794dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Provide basic AliasAnalysis support for GVN. 795dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FPM->add(createBasicAliasAnalysisPass()); 796dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Promote allocas to registers. 797dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FPM->add(createPromoteMemoryToRegisterPass()); 798dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Do simple "peephole" optimizations and bit-twiddling optzns. 799dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FPM->add(createInstructionCombiningPass()); 800dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Reassociate expressions. 801dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FPM->add(createReassociatePass()); 802dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Eliminate Common SubExpressions. 803dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FPM->add(createGVNPass()); 804dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Simplify the control flow graph (deleting unreachable blocks, etc). 805dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FPM->add(createCFGSimplificationPass()); 806dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FPM->doInitialization(); 807dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 808dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // For each function in the module 809dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Module::iterator it; 810dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Module::iterator end = OpenModule->end(); 811dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (it = OpenModule->begin(); it != end; ++it) { 812dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Run the FPM on this function 813dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FPM->run(*it); 814dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 815dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 816dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // We don't need this anymore 817dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor delete FPM; 818dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 819dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OpenModule = NULL; 820dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Engines.push_back(NewEngine); 821dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NewEngine->finalizeObject(); 822dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return NewEngine->getPointerToFunction(F); 823dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 824dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return NULL; 825dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 826dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 827dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorvoid *MCJITHelper::getPointerToNamedFunction(const std::string &Name) 828dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor{ 829dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Look for the function in each of our execution engines. 830dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor EngineVector::iterator begin = Engines.begin(); 831dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor EngineVector::iterator end = Engines.end(); 832dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor EngineVector::iterator it; 833dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (it = begin; it != end; ++it) { 834dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Function *F = (*it)->FindFunctionNamed(Name.c_str())) 835dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return (*it)->getPointerToFunction(F); 836dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 837dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 838dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return NULL; 839dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 840dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 841dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorvoid MCJITHelper::dump() 842dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor{ 843dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ModuleVector::iterator begin = Modules.begin(); 844dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ModuleVector::iterator end = Modules.end(); 845dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ModuleVector::iterator it; 846dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (it = begin; it != end; ++it) 847dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor (*it)->dump(); 848dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 849dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 850dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 851dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// Code Generation 852dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 853dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 854dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic MCJITHelper *TheHelper; 855de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainarstatic LLVMContext TheContext; 856de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainarstatic IRBuilder<> Builder(TheContext); 857dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic std::map<std::string, AllocaInst*> NamedValues; 858dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 859dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *ErrorV(const char *Str) { Error(Str); return 0; } 860dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 861dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// CreateEntryBlockAlloca - Create an alloca instruction in the entry block of 862dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// the function. This is used for mutable variables etc. 863dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic AllocaInst *CreateEntryBlockAlloca(Function *TheFunction, 864dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor const std::string &VarName) { 865dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor IRBuilder<> TmpB(&TheFunction->getEntryBlock(), 866dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheFunction->getEntryBlock().begin()); 867de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar return TmpB.CreateAlloca(Type::getDoubleTy(TheContext), 0, VarName.c_str()); 868dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 869dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 870dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *NumberExprAST::Codegen() { 871de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar return ConstantFP::get(TheContext, APFloat(Val)); 872dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 873dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 874dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *VariableExprAST::Codegen() { 875dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Look this variable up in the function. 876dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *V = NamedValues[Name]; 877dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor char ErrStr[256]; 878dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor sprintf(ErrStr, "Unknown variable name %s", Name.c_str()); 879dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (V == 0) return ErrorV(ErrStr); 880dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 881dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Load the value. 882dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Builder.CreateLoad(V, Name.c_str()); 883dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 884dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 885dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *UnaryExprAST::Codegen() { 886dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *OperandV = Operand->Codegen(); 887dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (OperandV == 0) return 0; 888ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 889dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *F = TheHelper->getFunction(MakeLegalFunctionName(std::string("unary")+Opcode)); 890dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (F == 0) 891dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorV("Unknown unary operator"); 892ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 893dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Builder.CreateCall(F, OperandV, "unop"); 894dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 895dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 896dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *BinaryExprAST::Codegen() { 897dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Special case '=' because we don't want to emit the LHS as an expression. 898dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Op == '=') { 899dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Assignment requires the LHS to be an identifier. 9006948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar VariableExprAST *LHSE = static_cast<VariableExprAST*>(LHS); 901dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!LHSE) 902dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorV("destination of '=' must be a variable"); 903dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Codegen the RHS. 904dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *Val = RHS->Codegen(); 905dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Val == 0) return 0; 906dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 907dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Look up the name. 908dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *Variable = NamedValues[LHSE->getName()]; 909dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Variable == 0) return ErrorV("Unknown variable name"); 910dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 911dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateStore(Val, Variable); 912dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Val; 913dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 914ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 915dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *L = LHS->Codegen(); 916dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *R = RHS->Codegen(); 917dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (L == 0 || R == 0) return 0; 918ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 919dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor switch (Op) { 920dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case '+': return Builder.CreateFAdd(L, R, "addtmp"); 921dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case '-': return Builder.CreateFSub(L, R, "subtmp"); 922dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case '*': return Builder.CreateFMul(L, R, "multmp"); 923dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case '/': return Builder.CreateFDiv(L, R, "divtmp"); 924dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case '<': 925dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor L = Builder.CreateFCmpULT(L, R, "cmptmp"); 926dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Convert bool 0/1 to double 0.0 or 1.0 927de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar return Builder.CreateUIToFP(L, Type::getDoubleTy(TheContext), "booltmp"); 928dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor default: break; 929dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 930ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 931dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If it wasn't a builtin binary operator, it must be a user defined one. Emit 932dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // a call to it. 933dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *F = TheHelper->getFunction(MakeLegalFunctionName(std::string("binary")+Op)); 934dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor assert(F && "binary operator not found!"); 935ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 936dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *Ops[] = { L, R }; 937dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Builder.CreateCall(F, Ops, "binop"); 938dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 939dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 940dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *CallExprAST::Codegen() { 941dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Look up the name in the global module table. 942dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *CalleeF = TheHelper->getFunction(Callee); 943dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CalleeF == 0) 944dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorV("Unknown function referenced"); 945ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 946dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If argument mismatch error. 947dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CalleeF->arg_size() != Args.size()) 948dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return ErrorV("Incorrect # arguments passed"); 949dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 950dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<Value*> ArgsV; 951dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (unsigned i = 0, e = Args.size(); i != e; ++i) { 952dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ArgsV.push_back(Args[i]->Codegen()); 953dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (ArgsV.back() == 0) return 0; 954dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 955ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 956dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return Builder.CreateCall(CalleeF, ArgsV, "calltmp"); 957dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 958dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 959dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *IfExprAST::Codegen() { 960dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *CondV = Cond->Codegen(); 961dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (CondV == 0) return 0; 962ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 963dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Convert condition to a bool by comparing equal to 0.0. 964de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar CondV = Builder.CreateFCmpONE( 965de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar CondV, ConstantFP::get(TheContext, APFloat(0.0)), "ifcond"); 966ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 967dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *TheFunction = Builder.GetInsertBlock()->getParent(); 968ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 969dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Create blocks for the then and else cases. Insert the 'then' block at the 970dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // end of the function. 971de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar BasicBlock *ThenBB = BasicBlock::Create(TheContext, "then", TheFunction); 972de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar BasicBlock *ElseBB = BasicBlock::Create(TheContext, "else"); 973de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar BasicBlock *MergeBB = BasicBlock::Create(TheContext, "ifcont"); 974ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 975dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateCondBr(CondV, ThenBB, ElseBB); 976ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 977dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit then value. 978dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.SetInsertPoint(ThenBB); 979ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 980dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *ThenV = Then->Codegen(); 981dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (ThenV == 0) return 0; 982ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 983dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateBr(MergeBB); 984dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Codegen of 'Then' can change the current block, update ThenBB for the PHI. 985dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ThenBB = Builder.GetInsertBlock(); 986ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 987dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit else block. 988dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheFunction->getBasicBlockList().push_back(ElseBB); 989dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.SetInsertPoint(ElseBB); 990ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 991dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *ElseV = Else->Codegen(); 992dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (ElseV == 0) return 0; 993ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 994dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateBr(MergeBB); 995dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Codegen of 'Else' can change the current block, update ElseBB for the PHI. 996dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ElseBB = Builder.GetInsertBlock(); 997ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 998dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit merge block. 999dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheFunction->getBasicBlockList().push_back(MergeBB); 1000dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.SetInsertPoint(MergeBB); 1001de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar PHINode *PN = Builder.CreatePHI(Type::getDoubleTy(TheContext), 2, "iftmp"); 1002ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1003dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PN->addIncoming(ThenV, ThenBB); 1004dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor PN->addIncoming(ElseV, ElseBB); 1005dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return PN; 1006dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1007dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1008dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *ForExprAST::Codegen() { 1009dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Output this as: 1010dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // var = alloca double 1011dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // ... 1012dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // start = startexpr 1013dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // store start -> var 1014dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // goto loop 1015ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines // loop: 1016dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // ... 1017dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // bodyexpr 1018dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // ... 1019dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // loopend: 1020dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // step = stepexpr 1021dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // endcond = endexpr 1022dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // 1023dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // curvar = load var 1024dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // nextvar = curvar + step 1025dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // store nextvar -> var 1026dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // br endcond, loop, endloop 1027dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // outloop: 1028ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1029dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *TheFunction = Builder.GetInsertBlock()->getParent(); 1030dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1031dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Create an alloca for the variable in the entry block. 1032dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor AllocaInst *Alloca = CreateEntryBlockAlloca(TheFunction, VarName); 1033ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1034dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit the start code first, without 'variable' in scope. 1035dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *StartVal = Start->Codegen(); 1036dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (StartVal == 0) return 0; 1037ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1038dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Store the value into the alloca. 1039dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateStore(StartVal, Alloca); 1040ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1041dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Make the new basic block for the loop header, inserting after current 1042dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // block. 1043de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar BasicBlock *LoopBB = BasicBlock::Create(TheContext, "loop", TheFunction); 1044ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1045dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Insert an explicit fall through from the current block to the LoopBB. 1046dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateBr(LoopBB); 1047dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1048dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Start insertion in LoopBB. 1049dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.SetInsertPoint(LoopBB); 1050ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1051dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Within the loop, the variable is defined equal to the PHI node. If it 1052dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // shadows an existing variable, we have to restore it, so save it now. 1053dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor AllocaInst *OldVal = NamedValues[VarName]; 1054dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues[VarName] = Alloca; 1055ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1056dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit the body of the loop. This, like any other expr, can change the 1057dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // current BB. Note that we ignore the value computed by the body, but don't 1058dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // allow an error. 1059dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Body->Codegen() == 0) 1060dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 1061ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1062dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit the step value. 1063dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *StepVal; 1064dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Step) { 1065dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor StepVal = Step->Codegen(); 1066dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (StepVal == 0) return 0; 1067dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } else { 1068dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If not specified, use 1.0. 1069de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar StepVal = ConstantFP::get(TheContext, APFloat(1.0)); 1070dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1071ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1072dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Compute the end condition. 1073dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *EndCond = End->Codegen(); 1074dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (EndCond == 0) return EndCond; 1075ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1076dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Reload, increment, and restore the alloca. This handles the case where 1077dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // the body of the loop mutates the variable. 1078dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *CurVar = Builder.CreateLoad(Alloca, VarName.c_str()); 1079dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *NextVar = Builder.CreateFAdd(CurVar, StepVal, "nextvar"); 1080dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateStore(NextVar, Alloca); 1081ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1082dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Convert condition to a bool by comparing equal to 0.0. 1083de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar EndCond = Builder.CreateFCmpONE( 1084de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar EndCond, ConstantFP::get(TheContext, APFloat(0.0)), "loopcond"); 1085ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1086dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Create the "after loop" block and insert it. 1087de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar BasicBlock *AfterBB = 1088de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar BasicBlock::Create(TheContext, "afterloop", TheFunction); 1089ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1090dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Insert the conditional branch into the end of LoopEndBB. 1091dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateCondBr(EndCond, LoopBB, AfterBB); 1092ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1093dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Any new code will be inserted in AfterBB. 1094dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.SetInsertPoint(AfterBB); 1095ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1096dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Restore the unshadowed variable. 1097dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (OldVal) 1098dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues[VarName] = OldVal; 1099dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor else 1100dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues.erase(VarName); 1101dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1102ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1103dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // for expr always returns 0.0. 1104de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar return Constant::getNullValue(Type::getDoubleTy(TheContext)); 1105dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1106dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1107dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorValue *VarExprAST::Codegen() { 1108dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::vector<AllocaInst *> OldBindings; 1109ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1110dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *TheFunction = Builder.GetInsertBlock()->getParent(); 1111dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1112dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Register all variables and emit their initializer. 1113dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (unsigned i = 0, e = VarNames.size(); i != e; ++i) { 1114dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor const std::string &VarName = VarNames[i].first; 1115dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ExprAST *Init = VarNames[i].second; 1116ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1117dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Emit the initializer before adding the variable to scope, this prevents 1118dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // the initializer from referencing the variable itself, and permits stuff 1119dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // like this: 1120dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // var a = 1 in 1121dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // var a = a in ... # refers to outer 'a'. 1122dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *InitVal; 1123dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Init) { 1124dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor InitVal = Init->Codegen(); 1125dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (InitVal == 0) return 0; 1126dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } else { // If not specified, use 0.0. 1127de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar InitVal = ConstantFP::get(TheContext, APFloat(0.0)); 1128dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1129ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1130dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor AllocaInst *Alloca = CreateEntryBlockAlloca(TheFunction, VarName); 1131dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateStore(InitVal, Alloca); 1132dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1133dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Remember the old variable binding so that we can restore the binding when 1134dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // we unrecurse. 1135dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor OldBindings.push_back(NamedValues[VarName]); 1136ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1137dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Remember this binding. 1138dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues[VarName] = Alloca; 1139dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1140ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1141dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Codegen the body, now that all vars are in scope. 1142dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Value *BodyVal = Body->Codegen(); 1143dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (BodyVal == 0) return 0; 1144ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1145dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Pop all our variables from scope. 1146dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (unsigned i = 0, e = VarNames.size(); i != e; ++i) 1147dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues[VarNames[i].first] = OldBindings[i]; 1148dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1149dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Return the body computation. 1150dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return BodyVal; 1151dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1152dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1153dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorFunction *PrototypeAST::Codegen() { 1154dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Make the function type: double(double,double) etc. 1155de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar std::vector<Type *> Doubles(Args.size(), Type::getDoubleTy(TheContext)); 1156de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar FunctionType *FT = 1157de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar FunctionType::get(Type::getDoubleTy(TheContext), Doubles, false); 1158dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1159dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor std::string FnName = MakeLegalFunctionName(Name); 1160dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1161dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Module* M = TheHelper->getModuleForNewFunction(); 1162dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1163dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *F = Function::Create(FT, Function::ExternalLinkage, FnName, M); 1164dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1165dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If F conflicted, there was already something named 'FnName'. If it has a 1166dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // body, don't allow redefinition or reextern. 1167dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (F->getName() != FnName) { 1168dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Delete the one we just made and get the existing one. 1169dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor F->eraseFromParent(); 1170dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor F = M->getFunction(Name); 1171ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1172dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If F already has a body, reject this. 1173dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (!F->empty()) { 1174dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ErrorF("redefinition of function"); 1175dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 1176dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1177ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1178dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If F took a different number of args, reject. 1179dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (F->arg_size() != Args.size()) { 1180dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ErrorF("redefinition of function with different # args"); 1181dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 1182dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1183dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1184ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1185dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Set names for all arguments. 1186dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor unsigned Idx = 0; 1187dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (Function::arg_iterator AI = F->arg_begin(); Idx != Args.size(); 1188dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor ++AI, ++Idx) 1189dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor AI->setName(Args[Idx]); 1190ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1191dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return F; 1192dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1193dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1194dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// CreateArgumentAllocas - Create an alloca for each argument and register the 1195dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// argument in the symbol table so that references to it will succeed. 1196dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorvoid PrototypeAST::CreateArgumentAllocas(Function *F) { 1197dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function::arg_iterator AI = F->arg_begin(); 1198dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor for (unsigned Idx = 0, e = Args.size(); Idx != e; ++Idx, ++AI) { 1199dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Create an alloca for this variable. 1200dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor AllocaInst *Alloca = CreateEntryBlockAlloca(F, Args[Idx]); 1201dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1202dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Store the initial value into the alloca. 1203dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateStore(AI, Alloca); 1204dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1205dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Add arguments to variable symbol table. 1206dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues[Args[Idx]] = Alloca; 1207dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1208dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1209dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1210dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew KaylorFunction *FunctionAST::Codegen() { 1211dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor NamedValues.clear(); 1212ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1213dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Function *TheFunction = Proto->Codegen(); 1214dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (TheFunction == 0) 1215dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 1216ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1217dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // If this is an operator, install it. 1218dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Proto->isBinaryOp()) 1219dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence[Proto->getOperatorName()] = Proto->getBinaryPrecedence(); 1220ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1221dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Create a new basic block to start insertion into. 1222de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar BasicBlock *BB = BasicBlock::Create(TheContext, "entry", TheFunction); 1223dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.SetInsertPoint(BB); 1224ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1225dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Add all arguments to the symbol table and create their allocas. 1226dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Proto->CreateArgumentAllocas(TheFunction); 1227dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1228dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Value *RetVal = Body->Codegen()) { 1229dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Finish off the function. 1230dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor Builder.CreateRet(RetVal); 1231dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1232dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Validate the generated code, checking for consistency. 1233dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor verifyFunction(*TheFunction); 1234dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1235dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return TheFunction; 1236dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1237ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1238dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Error reading body, remove function. 1239dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheFunction->eraseFromParent(); 1240dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1241dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Proto->isBinaryOp()) 1242dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence.erase(Proto->getOperatorName()); 1243dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 1244dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1245dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1246dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 1247dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// Top-Level parsing and JIT Driver 1248dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 1249dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1250dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic void HandleDefinition() { 1251dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (FunctionAST *F = ParseDefinition()) { 1252dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Function *LF = F->Codegen()) { 1253dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifndef MINIMAL_STDERR_OUTPUT 1254dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor fprintf(stderr, "Read function definition:"); 1255dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor LF->dump(); 1256dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 1257dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1258dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } else { 1259dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Skip token for error recovery. 1260dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 1261dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1262dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1263dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1264dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic void HandleExtern() { 1265dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (PrototypeAST *P = ParseExtern()) { 1266dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Function *F = P->Codegen()) { 1267dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifndef MINIMAL_STDERR_OUTPUT 1268dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor fprintf(stderr, "Read extern: "); 1269dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor F->dump(); 1270dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 1271dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1272dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } else { 1273dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Skip token for error recovery. 1274dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 1275dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1276dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1277dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1278dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic void HandleTopLevelExpression() { 1279dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Evaluate a top-level expression into an anonymous function. 1280dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (FunctionAST *F = ParseTopLevelExpr()) { 1281dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor if (Function *LF = F->Codegen()) { 1282dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // JIT the function, returning a function pointer. 1283dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor void *FPtr = TheHelper->getPointerToFunction(LF); 1284ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1285dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Cast it to the right type (takes no arguments, returns a double) so we 1286dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // can call it as a native function. 1287dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor double (*FP)() = (double (*)())(intptr_t)FPtr; 1288dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifdef MINIMAL_STDERR_OUTPUT 1289dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor FP(); 1290dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#else 1291dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor fprintf(stderr, "Evaluated to %f\n", FP()); 1292dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 1293dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1294dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } else { 1295dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Skip token for error recovery. 1296dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 1297dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1298dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1299dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1300dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// top ::= definition | external | expression | ';' 1301dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorstatic void MainLoop() { 1302dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor while (1) { 1303dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifndef MINIMAL_STDERR_OUTPUT 1304dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor fprintf(stderr, "ready> "); 1305dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 1306dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor switch (CurTok) { 1307dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_eof: return; 1308dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case ';': getNextToken(); break; // ignore top-level semicolons. 1309dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_def: HandleDefinition(); break; 1310dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor case tok_extern: HandleExtern(); break; 1311dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor default: HandleTopLevelExpression(); break; 1312dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1313dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor } 1314dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1315dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1316dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 1317dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// "Library" functions that can be "extern'd" from user code. 1318dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 1319dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1320dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// putchard - putchar that takes a double and returns 0. 1321ebe69fe11e48d322045d5949c83283927a0d790bStephen Hinesextern "C" 1322dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylordouble putchard(double X) { 1323dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor putchar((char)X); 1324dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 1325dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1326dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1327dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor/// printd - printf that takes a double prints it as "%f\n", returning 0. 1328ebe69fe11e48d322045d5949c83283927a0d790bStephen Hinesextern "C" 1329dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylordouble printd(double X) { 1330dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor printf("%f", X); 1331dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 1332dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1333dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1334ebe69fe11e48d322045d5949c83283927a0d790bStephen Hinesextern "C" 1335dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylordouble printlf() { 1336dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor printf("\n"); 1337dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 1338dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1339dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1340dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 1341dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor// Main driver code. 1342dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor//===----------------------------------------------------------------------===// 1343dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1344dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylorint main() { 1345dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor InitializeNativeTarget(); 1346dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor InitializeNativeTargetAsmPrinter(); 1347dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor InitializeNativeTargetAsmParser(); 1348de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar LLVMContext &Context = TheContext; 1349dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1350dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Install standard binary operators. 1351dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // 1 is lowest precedence. 1352dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence['='] = 2; 1353dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence['<'] = 10; 1354dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence['+'] = 20; 1355dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence['-'] = 20; 1356dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence['/'] = 40; 1357dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor BinopPrecedence['*'] = 40; // highest. 1358dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1359dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Prime the first token. 1360dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifndef MINIMAL_STDERR_OUTPUT 1361dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor fprintf(stderr, "ready> "); 1362dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 1363dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor getNextToken(); 1364dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1365dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Make the helper, which holds all the code. 1366dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheHelper = new MCJITHelper(Context); 1367dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1368dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Run the main "interpreter loop" now. 1369dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor MainLoop(); 1370dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1371dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#ifndef MINIMAL_STDERR_OUTPUT 1372dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor // Print out all of the generated code. 1373dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor TheHelper->dump(); 1374dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor#endif 1375dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor 1376dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor return 0; 1377dbbbccc3492aa7f91f21d8902cfb0b766dabb849Andrew Kaylor} 1378