本文整理汇总了C++中VariableExprAST类的典型用法代码示例。如果您正苦于以下问题：C++ VariableExprAST类的具体用法？C++ VariableExprAST怎么用？C++ VariableExprAST使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了VariableExprAST类的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。
示例1: ErrorV
Value *BinaryExprAST::Codegen() {
KSDbgInfo.emitLocation(this);
// Special case '=' because we don't want to emit the LHS as an expression.
if (Op == '=') {
// Assignment requires the LHS to be an identifier.
// This assume we're building without RTTI because LLVM builds that way by
// default. If you build LLVM with RTTI this can be changed to a
// dynamic_cast for automatic error checking.
VariableExprAST *LHSE = static_cast<VariableExprAST *>(LHS);
if (!LHSE)
return ErrorV("destination of '=' must be a variable");
// Codegen the RHS.
Value *Val = RHS->Codegen();
if (Val == 0)
return 0;
// Look up the name.
Value *Variable = NamedValues[LHSE->getName()];
if (Variable == 0)
return ErrorV("Unknown variable name");
Builder.CreateStore(Val, Variable);
return Val;
}
Value *L = LHS->Codegen();
Value *R = RHS->Codegen();
if (L == 0 || R == 0)
return 0;
switch (Op) {
case '+':
return Builder.CreateFAdd(L, R, "addtmp");
case '-':
return Builder.CreateFSub(L, R, "subtmp");
case '*':
return Builder.CreateFMul(L, R, "multmp");
case '<':
L = Builder.CreateFCmpULT(L, R, "cmptmp");
// Convert bool 0/1 to double 0.0 or 1.0
return Builder.CreateUIToFP(L, Type::getDoubleTy(getGlobalContext()),
"booltmp");
default:
break;
}
// If it wasn't a builtin binary operator, it must be a user defined one. Emit
// a call to it.
Function *F = TheModule->getFunction(std::string("binary") + Op);
assert(F && "binary operator not found!");
Value *Ops[] = { L, R };
return Builder.CreateCall(F, Ops, "binop");
}
开发者ID:0x00evil，项目名称:llvm，代码行数:55，代码来源:toy.cpp
示例2:
Value *Codegen::Generate(BinaryExprAST *expr) {
using namespace boost;
// treat assignment separately
if (expr->GetOp() == '=') {
VariableExprAST *identifier = dynamic_cast<VariableExprAST*>(expr->GetLHS());
if ( !identifier)
return BaseError::Throw<Value*>("Left hand of assignment must be a variable");
Value *val = this->Generate(expr->GetRHS());
if ( !val)
return BaseError::Throw<Value*>("Invalid assignment value to variable");
Value *variable = NamedValues[identifier->GetName()];
if ( !variable)
return BaseError::Throw<Value*>("Unknown variable, cannot assign");
Builder.CreateStore(val, variable);
return val;
}
Value *L = this->Generate(expr->GetLHS());
Value *R = this->Generate(expr->GetRHS());
if (L == 0 || R == 0)
return 0;
switch (expr->GetOp()) {
case '+':
return Builder.CreateFAdd(L, R, "addtmp");
case '-':
return Builder.CreateFSub(L, R, "subtmp");
case '*':
return Builder.CreateFMul(L, R, "multmp");
case '/':
return Builder.CreateFDiv(L, R, "divtmp");
case '<':
L = Builder.CreateFCmpULT(L, R, "cmptmp");
return Builder.CreateUIToFP(L, Type::getDoubleTy(getGlobalContext()), "booltmp");
default:
break;
}
Function *opFunc = TheModule->getFunction("binary" + expr->GetOp());
if ( !opFunc)
return BaseError::Throw<Value*>(str(format("Unknown binary operator '%1%'") % expr->GetOp()));
Value *args[2] = { L, R };
return Builder.CreateCall(opFunc, args, "binop");
}
开发者ID:altschuler，项目名称:cmplr，代码行数:50，代码来源:Codegen.cpp
示例3: ErrorV
Value *BinaryExprAST::Codegen() {
// Special case '=' because we don't want to emit the LHS as an expression.
if (Op == '=') {
// Assignment requires the LHS to be an identifier.
VariableExprAST *LHSE = static_cast<VariableExprAST*>(LHS);
if (!LHSE)
return ErrorV("destination of '=' must be a variable");
// Codegen the RHS.
Value *Val = RHS->Codegen();
if (Val == 0) return 0;
// Look up the name.
Value *Variable = NamedValues[LHSE->getName()];
if (Variable == 0) return ErrorV("Unknown variable name");
Builder.CreateStore(Val, Variable);
return Val;
}
Value *L = LHS->Codegen();
Value *R = RHS->Codegen();
if (L == 0 || R == 0) return 0;
switch (Op) {
case '+': return Builder.CreateFAdd(L, R, "addtmp");
case '-': return Builder.CreateFSub(L, R, "subtmp");
case '*': return Builder.CreateFMul(L, R, "multmp");
case '/': return Builder.CreateFDiv(L, R, "divtmp");
case '<':
L = Builder.CreateFCmpULT(L, R, "cmptmp");
// Convert bool 0/1 to double 0.0 or 1.0
return Builder.CreateUIToFP(L, Type::getDoubleTy(getGlobalContext()),
"booltmp");
default: break;
}
// If it wasn't a builtin binary operator, it must be a user defined one. Emit
// a call to it.
Function *F = TheHelper->getFunction(MakeLegalFunctionName(std::string("binary")+Op));
assert(F && "binary operator not found!");
Value *Ops[] = { L, R };
return Builder.CreateCall(F, Ops, "binop");
}
开发者ID:0x00evil，项目名称:llvm，代码行数:44，代码来源:toy.cpp
示例4: ErrorV
Value *BinaryExprAST::Codegen() {
KSDbgInfo.emitLocation(this);
if (Op == '=') {
VariableExprAST *LHSE = dynamic_cast<VariableExprAST *>(LHS);
if (!LHSE)
return ErrorV("destination of '=' must be a variable");
Value *Val = RHS->Codegen();
if (!Val) return 0;
Value *Variable = NamedValues[LHSE->getName()];
if (!Variable) return 0;
Builder.CreateStore(Val, Variable);
return Val;
}
Value *L = LHS->Codegen();
Value *R = RHS->Codegen();
if (L == 0 || R == 0) return 0;
switch (Op) {
case '+': return Builder.CreateFAdd(L, R, "addtmp");
case '-': return Builder.CreateFSub(L, R, "subtmp");
case '*': return Builder.CreateFMul(L, R, "multmp");
case '<':
L = Builder.CreateFCmpULT(L, R, "cmptmp");
return Builder.CreateUIToFP(L, Type::getDoubleTy(getGlobalContext()), "booltmp");
default: break;
}
// user defined operators
Function *F = TheModule->getFunction(std::string("binary")+Op);
assert(F && "binary operator not found!");
Value *Ops[2] = { L, R };
return Builder.CreateCall(F, Ops, "binop");
}
开发者ID:tctony，项目名称:llvm-tutorial，代码行数:40，代码来源:toy.cpp
注：本文中的VariableExprAST类示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。 |
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