ldc/gen/dvalue.cpp
David Nadlinger 848dee32d4 Store bools as i8.
I really hope we can refactor this to use a less leaky
abstraction later – it should at least be possible to merge
voidToI8 and i1ToI8.
2013-06-07 03:20:54 +02:00

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//===-- dvalue.cpp --------------------------------------------------------===//
//
// LDC the LLVM D compiler
//
// This file is distributed under the BSD-style LDC license. See the LICENSE
// file for details.
//
//===----------------------------------------------------------------------===//
#include "gen/dvalue.h"
#include "declaration.h"
#include "gen/irstate.h"
#include "gen/llvm.h"
#include "gen/llvmhelpers.h"
#include "gen/logger.h"
#include "gen/tollvm.h"
/////////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////
static bool checkVarValueType(LLType* t, bool extraDeref)
{
if (extraDeref)
{
llvm::PointerType* pt = llvm::dyn_cast<llvm::PointerType>(t);
if (!pt) return false;
t = pt->getElementType();
}
llvm::PointerType* pt = llvm::dyn_cast<llvm::PointerType>(t);
if (!pt) return false;
// bools should not be stored as i1 any longer.
if (pt->getElementType() == llvm::Type::getInt1Ty(gIR->context()))
return false;
return true;
}
DVarValue::DVarValue(Type* t, VarDeclaration* vd, LLValue* llvmValue)
: DValue(t), var(vd), val(llvmValue)
{
assert(checkVarValueType(llvmValue->getType(), isSpecialRefVar(vd)));
}
DVarValue::DVarValue(Type* t, LLValue* llvmValue)
: DValue(t), var(0), val(llvmValue)
{
assert(checkVarValueType(llvmValue->getType(), false));
}
LLValue* DVarValue::getLVal()
{
assert(val);
if (var && isSpecialRefVar(var))
return DtoLoad(val);
return val;
}
LLValue* DVarValue::getRVal()
{
assert(val);
llvm::Value* storage = val;
if (var && isSpecialRefVar(var))
storage = DtoLoad(storage);
if (DtoIsPassedByRef(type->toBasetype()))
return storage;
llvm::Value* rawValue = DtoLoad(storage);
if (type->toBasetype()->ty == Tbool)
{
assert(rawValue->getType() == llvm::Type::getInt8Ty(gIR->context()));
return gIR->ir->CreateTrunc(rawValue,
llvm::Type::getInt1Ty(gIR->context()));
}
return rawValue;
}
LLValue* DVarValue::getRefStorage()
{
assert(val);
assert(isSpecialRefVar(var));
return val;
}
/////////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////
LLValue* DSliceValue::getRVal()
{
assert(len);
assert(ptr);
return DtoAggrPair(len, ptr);
}
/////////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////
DFuncValue::DFuncValue(FuncDeclaration* fd, LLValue* v, LLValue* vt)
: DValue(fd->type), func(fd), val(v), vthis(vt)
{}
LLValue* DFuncValue::getRVal()
{
assert(val);
return val;
}
/////////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////
LLValue* DConstValue::getRVal()
{
assert(c);
return c;
}