Page Menu
Home
Xreate
Search
Configure Global Search
Log In
Docs
Questions
Repository
Issues
Patches
Internal API
Files
F4001489
typeinference.cpp
No One
Temporary
Actions
Download File
Edit File
Delete File
View Transforms
Subscribe
Mute Notifications
Subscribers
None
File Metadata
Details
File Info
Storage
Attached
Created
Thu, Jul 9, 6:28 AM
Size
2 KB
Mime Type
text/x-c++
Expires
Sat, Jul 11, 6:28 AM (1 d, 3 h)
Engine
blob
Format
Raw Data
Handle
273426
Attached To
rXR Xreate
typeinference.cpp
View Options
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* typeinference.cpp
*
* Author: pgess <v.melnychenko@xreate.org>
* Created on April 16, 2017, 10:13 AM
*/
/**
* \file typeinference.h
* \brief Type inference analysis
*/
#include "typeinference.h"
#include "llvmlayer.h"
#include "transcendlayer.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/DerivedTypes.h"
using namespace std;
namespace xreate{
namespace typeinference{
//TODO type conversion:
//a) automatically expand types int -> bigger int; int -> floating
//b) detect exact type of `num` based on max used numeral / function type
//c) warning if need to truncate (allow/dissallow based on annotations)
llvm::Value*
doAutomaticTypeConversion(llvm::Value* source, llvm::Type* tyTarget, llvm::IRBuilder<>& builder) {
if(tyTarget->isIntegerTy() && source->getType()->isIntegerTy()) {
llvm::IntegerType* tyTargetInt = llvm::dyn_cast<llvm::IntegerType>(tyTarget);
llvm::IntegerType* tySourceInt = llvm::dyn_cast<llvm::IntegerType>(source->getType());
if(tyTargetInt->getBitWidth() < tySourceInt->getBitWidth()) {
return builder.CreateCast(llvm::Instruction::Trunc, source, tyTarget);
}
if(tyTargetInt->getBitWidth() > tySourceInt->getBitWidth()) {
return builder.CreateCast(llvm::Instruction::SExt, source, tyTarget);
}
}
if(source->getType()->isIntegerTy() && tyTarget->isFloatingPointTy()) {
return builder.CreateCast(llvm::Instruction::SIToFP, source, tyTarget);
}
if (source->getType()->isStructTy() && tyTarget->isIntegerTy()){
llvm::StructType* sourceST = llvm::cast<llvm::StructType>(source->getType());
if(sourceST->getNumElements() == 1) {
llvm::Value* sourceElRaw = builder.CreateExtractValue(source, llvm::ArrayRef<unsigned>({0}));
return doAutomaticTypeConversion(sourceElRaw, tyTarget, builder);
}
}
return source;
}
ExpandedType
getType(const Expression& expression, const AST& ast) {
if(expression.type.isValid()) {
return ast.expandType(expression.type);
}
if(expression.__state == Expression::IDENT) {
Symbol s = Attachments::get<IdentifierSymbol>(expression);
return getType(CodeScope::getDefinition(s), ast);
}
if(Attachments::exists<TypeInferred>(expression)) {
return Attachments::get<TypeInferred>(expression);
}
if(expression.__state == Expression::NUMBER) {
return ExpandedType(TypeAnnotation(TypePrimitive::I32));
}
assert(false && "Type can't be determined for an expression");
}
}
} //end of namespace xreate::typeinference
Event Timeline
Log In to Comment