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Vector -> static array casts are by address.

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Fixes #176 (GitHub).
This commit is contained in:
David Nadlinger
2012-10-05 17:23:31 +02:00
parent 579c522e52
commit 4e49814afb
2 changed files with 34 additions and 14 deletions
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46
gen/llvmhelpers.cpp
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@@ -769,25 +769,45 @@ DValue* DtoCastVector(Loc& loc, DValue* val, Type* to)
assert(val->getType()->toBasetype()->ty == Tvector);
Type* totype = to->toBasetype();
LLType* tolltype = DtoType(to);
LLValue *vector = val->getRVal();
TypeVector *type = static_cast<TypeVector *>(val->getType()->toBasetype());
if (totype->ty == Tsarray)
{
if (Logger::enabled())
Logger::cout() << "src: " << *vector << "to type: " << *tolltype << '\n';
LLValue *array = DtoAlloca(to);
TypeSArray *st = static_cast<TypeSArray*>(totype);
for (int i = 0, n = st->dim->toInteger(); i < n; ++i) {
LLValue *lelem = DtoExtractElement(vector, i);
DImValue elem(type->elementType(), lelem);
lelem = DtoCast(loc, &elem, to->nextOf())->getRVal();
DtoStore(lelem, DtoGEPi(array, 0, i));
// If possible, we need to cast only the address of the vector without
// creating a copy, because, besides the fact that this seem to be the
// language semantics, DMD rewrites e.g. float4.array to
// cast(float[4])array.
if (val->isLVal())
{
LLValue* vector = val->getLVal();
if (Logger::enabled())
{
Logger::cout() << "src: " << *vector << "to type: " <<
*tolltype << " (casting address)\n";
}
return new DVarValue(to, DtoBitCast(vector, getPtrToType(tolltype)));
}
else
{
LLValue* vector = val->getRVal();
if (Logger::enabled())
{
Logger::cout() << "src: " << *vector << "to type: " <<
*tolltype << " (creating temporary)\n";
}
LLValue *array = DtoAlloca(to);
return new DImValue(to, array);
TypeSArray *st = static_cast<TypeSArray*>(totype);
for (int i = 0, n = st->dim->toInteger(); i < n; ++i) {
LLValue *lelem = DtoExtractElement(vector, i);
DImValue elem(type->elementType(), lelem);
lelem = DtoCast(loc, &elem, to->nextOf())->getRVal();
DtoStore(lelem, DtoGEPi(array, 0, i));
}
return new DImValue(to, array);
}
}
else
{

2
tests/d2/dmd-testsuite

Submodule tests/d2/dmd-testsuite updated: bc927e2bf8...c7624e001e