DValue* DtoNestedVariable(Loc& loc, Type* astype, VarDeclaration* vd, bool byref)
{
IF_LOG Logger::println("DtoNestedVariable for %s @ %s", vd->toChars(), loc.toChars());
LOG_SCOPE;
////////////////////////////////////
// Locate context value
Dsymbol* vdparent = vd->toParent2();
assert(vdparent);
IrFunction* irfunc = gIR->func();
// Check whether we can access the needed frame
FuncDeclaration *fd = irfunc->decl;
while (fd != vdparent) {
if (fd->isStatic()) {
error(loc, "function %s cannot access frame of function %s", irfunc->decl->toPrettyChars(), vdparent->toPrettyChars());
return new DVarValue(astype, vd, llvm::UndefValue::get(getPtrToType(DtoType(astype))));
}
fd = getParentFunc(fd, false);
assert(fd);
}
// is the nested variable in this scope?
if (vdparent == irfunc->decl)
{
LLValue* val = vd->ir.getIrValue();
return new DVarValue(astype, vd, val);
}
LLValue *dwarfValue = 0;
std::vector<LLValue*> dwarfAddr;
// get the nested context
LLValue* ctx = 0;
if (irfunc->nestedVar) {
// If this function has its own nested context struct, always load it.
ctx = irfunc->nestedVar;
dwarfValue = ctx;
} else if (irfunc->decl->isMember2()) {
// If this is a member function of a nested class without its own
// context, load the vthis member.
AggregateDeclaration* cd = irfunc->decl->isMember2();
LLValue* val = irfunc->thisArg;
if (cd->isClassDeclaration())
val = DtoLoad(val);
ctx = DtoLoad(DtoGEPi(val, 0, cd->vthis->ir.irField->index, ".vthis"));
} else {
// Otherwise, this is a simple nested function, load from the context
// argument.
ctx = DtoLoad(irfunc->nestArg);
dwarfValue = irfunc->nestArg;
if (global.params.symdebug)
gIR->DBuilder.OpDeref(dwarfAddr);
}
assert(ctx);
DtoCreateNestedContextType(vdparent->isFuncDeclaration());
assert(vd->ir.irLocal);
////////////////////////////////////
// Extract variable from nested context
LLValue* val = DtoBitCast(ctx, LLPointerType::getUnqual(irfunc->frameType));
IF_LOG {
Logger::cout() << "Context: " << *val << '\n';
Logger::cout() << "of type: " << *irfunc->frameType << '\n';
}
unsigned vardepth = vd->ir.irLocal->nestedDepth;
unsigned funcdepth = irfunc->depth;
IF_LOG {
Logger::cout() << "Variable: " << vd->toChars() << '\n';
Logger::cout() << "Variable depth: " << vardepth << '\n';
Logger::cout() << "Function: " << irfunc->decl->toChars() << '\n';
Logger::cout() << "Function depth: " << funcdepth << '\n';
}
if (vardepth == funcdepth) {
// This is not always handled above because functions without
// variables accessed by nested functions don't create new frames.
IF_LOG Logger::println("Same depth");
} else {
// Load frame pointer and index that...
if (dwarfValue && global.params.symdebug) {
gIR->DBuilder.OpOffset(dwarfAddr, val, vd->ir.irLocal->nestedDepth);
gIR->DBuilder.OpDeref(dwarfAddr);
}
IF_LOG Logger::println("Lower depth");
val = DtoGEPi(val, 0, vd->ir.irLocal->nestedDepth);
IF_LOG Logger::cout() << "Frame index: " << *val << '\n';
val = DtoAlignedLoad(val, (std::string(".frame.") + vdparent->toChars()).c_str());
IF_LOG Logger::cout() << "Frame: " << *val << '\n';
}
int idx = vd->ir.irLocal->nestedIndex;
assert(idx != -1 && "Nested context not yet resolved for variable.");
if (dwarfValue && global.params.symdebug)
gIR->DBuilder.OpOffset(dwarfAddr, val, idx);
val = DtoGEPi(val, 0, idx, vd->toChars());
IF_LOG {
Logger::cout() << "Addr: " << *val << '\n';
Logger::cout() << "of type: " << *val->getType() << '\n';
}
if (byref || (vd->isParameter() && vd->ir.irParam->arg->byref)) {
val = DtoAlignedLoad(val);
//dwarfOpDeref(dwarfAddr);
IF_LOG {
Logger::cout() << "Was byref, now: " << *val << '\n';
Logger::cout() << "of type: " << *val->getType() << '\n';
}
}
DValue *DtoNestedVariable(Loc &loc, Type *astype, VarDeclaration *vd,
bool byref) {
IF_LOG Logger::println("DtoNestedVariable for %s @ %s", vd->toChars(),
loc.toChars());
LOG_SCOPE;
////////////////////////////////////
// Locate context value
Dsymbol *vdparent = vd->toParent2();
assert(vdparent);
IrFunction *irfunc = gIR->func();
// Check whether we can access the needed frame
FuncDeclaration *fd = irfunc->decl;
while (fd && fd != vdparent) {
fd = getParentFunc(fd);
}
if (!fd) {
error(loc, "function `%s` cannot access frame of function `%s`",
irfunc->decl->toPrettyChars(), vdparent->toPrettyChars());
return new DLValue(astype, llvm::UndefValue::get(DtoPtrToType(astype)));
}
// is the nested variable in this scope?
if (vdparent == irfunc->decl) {
return makeVarDValue(astype, vd);
}
// get the nested context
LLValue *ctx = nullptr;
bool skipDIDeclaration = false;
auto currentCtx = gIR->funcGen().nestedVar;
if (currentCtx) {
Logger::println("Using own nested context of current function");
ctx = currentCtx;
} else if (irfunc->decl->isMember2()) {
Logger::println(
"Current function is member of nested class, loading vthis");
AggregateDeclaration *cd = irfunc->decl->isMember2();
LLValue *val = irfunc->thisArg;
if (cd->isClassDeclaration()) {
val = DtoLoad(val);
}
ctx = DtoLoad(DtoGEPi(val, 0, getVthisIdx(cd), ".vthis"));
skipDIDeclaration = true;
} else {
Logger::println("Regular nested function, loading context arg");
ctx = DtoLoad(irfunc->nestArg);
}
assert(ctx);
IF_LOG { Logger::cout() << "Context: " << *ctx << '\n'; }
DtoCreateNestedContextType(vdparent->isFuncDeclaration());
assert(isIrLocalCreated(vd));
////////////////////////////////////
// Extract variable from nested context
const auto frameType = LLPointerType::getUnqual(irfunc->frameType);
IF_LOG { Logger::cout() << "casting to: " << *irfunc->frameType << '\n'; }
LLValue *val = DtoBitCast(ctx, frameType);
IrLocal *const irLocal = getIrLocal(vd);
const auto vardepth = irLocal->nestedDepth;
const auto funcdepth = irfunc->depth;
IF_LOG {
Logger::cout() << "Variable: " << vd->toChars() << '\n';
Logger::cout() << "Variable depth: " << vardepth << '\n';
Logger::cout() << "Function: " << irfunc->decl->toChars() << '\n';
Logger::cout() << "Function depth: " << funcdepth << '\n';
}
if (vardepth == funcdepth) {
// This is not always handled above because functions without
// variables accessed by nested functions don't create new frames.
IF_LOG Logger::println("Same depth");
} else {
// Load frame pointer and index that...
IF_LOG Logger::println("Lower depth");
val = DtoGEPi(val, 0, vardepth);
IF_LOG Logger::cout() << "Frame index: " << *val << '\n';
val = DtoAlignedLoad(
val, (std::string(".frame.") + vdparent->toChars()).c_str());
IF_LOG Logger::cout() << "Frame: " << *val << '\n';
}
const auto idx = irLocal->nestedIndex;
assert(idx != -1 && "Nested context not yet resolved for variable.");
LLSmallVector<int64_t, 2> dwarfAddrOps;
LLValue *gep = DtoGEPi(val, 0, idx, vd->toChars());
val = gep;
IF_LOG {
Logger::cout() << "Addr: " << *val << '\n';
Logger::cout() << "of type: " << *val->getType() << '\n';
}
const bool isRefOrOut = vd->isRef() || vd->isOut();
if (isSpecialRefVar(vd)) {
// Handled appropriately by makeVarDValue() and EmitLocalVariable(), pass
// storage of pointer (reference lvalue).
} else if (byref || isRefOrOut) {
val = DtoAlignedLoad(val);
// ref/out variables get a reference-debuginfo-type in EmitLocalVariable();
// pass the GEP as reference lvalue in that case.
if (!isRefOrOut)
gIR->DBuilder.OpDeref(dwarfAddrOps);
IF_LOG {
Logger::cout() << "Was byref, now: " << *irLocal->value << '\n';
Logger::cout() << "of type: " << *irLocal->value->getType() << '\n';
}
}
void DtoCreateNestedContext(FuncDeclaration* fd) {
Logger::println("DtoCreateNestedContext for %s", fd->toChars());
LOG_SCOPE
DtoCreateNestedContextType(fd);
// construct nested variables array
if (!fd->nestedVars.empty())
{
IrFunction* irfunction = fd->ir.irFunc;
unsigned depth = irfunction->depth;
LLStructType *frameType = irfunction->frameType;
// Create frame for current function and append to frames list
// FIXME: alignment ?
LLValue* frame = 0;
if (fd->needsClosure())
frame = DtoGcMalloc(frameType, ".frame");
else
frame = DtoRawAlloca(frameType, 0, ".frame");
// copy parent frames into beginning
if (depth != 0) {
LLValue* src = irfunction->nestArg;
if (!src) {
assert(irfunction->thisArg);
assert(fd->isMember2());
LLValue* thisval = DtoLoad(irfunction->thisArg);
AggregateDeclaration* cd = fd->isMember2();
assert(cd);
assert(cd->vthis);
Logger::println("Indexing to 'this'");
if (cd->isStructDeclaration())
src = DtoExtractValue(thisval, cd->vthis->ir.irField->index, ".vthis");
else
src = DtoLoad(DtoGEPi(thisval, 0, cd->vthis->ir.irField->index, ".vthis"));
} else {
src = DtoLoad(src);
}
if (depth > 1) {
src = DtoBitCast(src, getVoidPtrType());
LLValue* dst = DtoBitCast(frame, getVoidPtrType());
DtoMemCpy(dst, src, DtoConstSize_t((depth-1) * PTRSIZE),
getABITypeAlign(getVoidPtrType()));
}
// Copy nestArg into framelist; the outer frame is not in the list of pointers
src = DtoBitCast(src, frameType->getContainedType(depth-1));
LLValue* gep = DtoGEPi(frame, 0, depth-1);
DtoAlignedStore(src, gep);
}
// store context in IrFunction
irfunction->nestedVar = frame;
// go through all nested vars and assign addresses where possible.
for (std::set<VarDeclaration*>::iterator i=fd->nestedVars.begin(); i!=fd->nestedVars.end(); ++i)
{
VarDeclaration* vd = *i;
LLValue* gep = DtoGEPi(frame, 0, vd->ir.irLocal->nestedIndex, vd->toChars());
if (vd->isParameter()) {
Logger::println("nested param: %s", vd->toChars());
LOG_SCOPE
IrParameter* parm = vd->ir.irParam;
if (parm->arg->byref)
{
storeVariable(vd, gep);
}
else
{
Logger::println("Copying to nested frame");
// The parameter value is an alloca'd stack slot.
// Copy to the nesting frame and leave the alloca for
// the optimizers to clean up.
DtoStore(DtoLoad(parm->value), gep);
gep->takeName(parm->value);
parm->value = gep;
}
} else {
Logger::println("nested var: %s", vd->toChars());
assert(!vd->ir.irLocal->value);
vd->ir.irLocal->value = gep;
}
if (global.params.symdebug) {
LLSmallVector<LLValue*, 2> addr;
dwarfOpOffset(addr, frameType, vd->ir.irLocal->nestedIndex);
DtoDwarfLocalVariable(frame, vd, addr);
}
}
}
}
static void DtoCreateNestedContextType(FuncDeclaration* fd) {
Logger::println("DtoCreateNestedContextType for %s", fd->toChars());
LOG_SCOPE
DtoDeclareFunction(fd);
if (fd->ir.irFunc->nestedContextCreated)
return;
fd->ir.irFunc->nestedContextCreated = true;
if (fd->nestedVars.empty()) {
// fill nestedVars
size_t nnest = fd->closureVars.dim;
for (size_t i = 0; i < nnest; ++i)
{
VarDeclaration* vd = static_cast<VarDeclaration*>(fd->closureVars.data[i]);
fd->nestedVars.insert(vd);
}
}
// construct nested variables array
if (!fd->nestedVars.empty())
{
Logger::println("has nested frame");
// start with adding all enclosing parent frames until a static parent is reached
LLStructType* innerFrameType = NULL;
unsigned depth = -1;
if (!fd->isStatic()) {
if (FuncDeclaration* parfd = getParentFunc(fd, true)) {
// Make sure the parent has already been analyzed.
DtoCreateNestedContextType(parfd);
innerFrameType = parfd->ir.irFunc->frameType;
if (innerFrameType)
depth = parfd->ir.irFunc->depth;
}
}
fd->ir.irFunc->depth = ++depth;
Logger::cout() << "Function " << fd->toChars() << " has depth " << depth << '\n';
typedef std::vector<LLType*> TypeVec;
TypeVec types;
if (depth != 0) {
assert(innerFrameType);
// Add frame pointer types for all but last frame
if (depth > 1) {
for (unsigned i = 0; i < (depth - 1); ++i) {
types.push_back(innerFrameType->getElementType(i));
}
}
// Add frame pointer type for last frame
types.push_back(LLPointerType::getUnqual(innerFrameType));
}
if (Logger::enabled() && depth != 0) {
Logger::println("Frame types: ");
LOG_SCOPE;
for (TypeVec::iterator i = types.begin(); i != types.end(); ++i)
Logger::cout() << **i << '\n';
}
// Add the direct nested variables of this function, and update their indices to match.
// TODO: optimize ordering for minimal space usage?
for (std::set<VarDeclaration*>::iterator i=fd->nestedVars.begin(); i!=fd->nestedVars.end(); ++i)
{
VarDeclaration* vd = *i;
if (!vd->ir.irLocal)
vd->ir.irLocal = new IrLocal(vd);
vd->ir.irLocal->nestedIndex = types.size();
vd->ir.irLocal->nestedDepth = depth;
if (vd->isParameter()) {
// Parameters will have storage associated with them (to handle byref etc.),
// so handle those cases specially by storing a pointer instead of a value.
const IrParameter* irparam = vd->ir.irParam;
const bool refout = vd->storage_class & (STCref | STCout);
const bool lazy = vd->storage_class & STClazy;
const bool byref = irparam->arg->byref;
const bool isVthisPtr = irparam->isVthis && !byref;
if (!(refout || (byref && !lazy)) || isVthisPtr) {
// This will be copied to the nesting frame.
if (lazy)
types.push_back(irparam->value->getType()->getContainedType(0));
else
types.push_back(DtoType(vd->type));
} else {
types.push_back(irparam->value->getType());
}
} else if (isSpecialRefVar(vd)) {
types.push_back(DtoType(vd->type->pointerTo()));
} else {
types.push_back(DtoType(vd->type));
}
if (Logger::enabled()) {
Logger::cout() << "Nested var '" << vd->toChars() <<
"' of type " << *types.back() << "\n";
}
}
LLStructType* frameType = LLStructType::create(gIR->context(), types,
std::string("nest.") + fd->toChars());
Logger::cout() << "frameType = " << *frameType << '\n';
// Store type in IrFunction
fd->ir.irFunc->frameType = frameType;
} else if (FuncDeclaration* parFunc = getParentFunc(fd, true)) {
// Propagate context arg properties if the context arg is passed on unmodified.
DtoCreateNestedContextType(parFunc);
fd->ir.irFunc->frameType = parFunc->ir.irFunc->frameType;
fd->ir.irFunc->depth = parFunc->ir.irFunc->depth;
}
}
LLValue* DtoNestedContext(Loc loc, Dsymbol* sym)
{
Logger::println("DtoNestedContext for %s", sym->toPrettyChars());
LOG_SCOPE;
IrFunction* irfunc = gIR->func();
bool fromParent = true;
LLValue* val;
// if this func has its own vars that are accessed by nested funcs
// use its own context
if (irfunc->nestedVar) {
val = irfunc->nestedVar;
fromParent = false;
}
// otherwise, it may have gotten a context from the caller
else if (irfunc->nestArg)
val = DtoLoad(irfunc->nestArg);
// or just have a this argument
else if (irfunc->thisArg)
{
AggregateDeclaration* ad = irfunc->decl->isMember2();
val = ad->isClassDeclaration() ? DtoLoad(irfunc->thisArg) : irfunc->thisArg;
if (!ad->vthis)
{
// This is just a plain 'outer' reference of a class nested in a
// function (but without any variables in the nested context).
return val;
}
val = DtoLoad(DtoGEPi(val, 0, ad->vthis->ir.irField->index, ".vthis"));
}
else
{
// Use null instead of e.g. LLVM's undef to not break bitwise
// comparison for instances of nested struct types which don't have any
// nested references.
return llvm::ConstantPointerNull::get(getVoidPtrType());
}
struct FuncDeclaration* fd = 0;
if (AggregateDeclaration *ad = sym->isAggregateDeclaration())
// If sym is a nested struct or a nested class, pass the frame
// of the function where sym is declared.
fd = ad->toParent()->isFuncDeclaration();
else
if (FuncDeclaration* symfd = sym->isFuncDeclaration()) {
// Make sure we've had a chance to analyze nested context usage
DtoCreateNestedContextType(symfd);
// if this is for a function that doesn't access variables from
// enclosing scopes, it doesn't matter what we pass.
// Tell LLVM about it by passing an 'undef'.
if (symfd && symfd->ir.irFunc->depth == -1)
return llvm::UndefValue::get(getVoidPtrType());
// If sym is a nested function, and it's parent context is different than the
// one we got, adjust it.
fd = getParentFunc(symfd, true);
}
if (fd) {
Logger::println("For nested function, parent is %s", fd->toChars());
FuncDeclaration* ctxfd = irfunc->decl;
Logger::println("Current function is %s", ctxfd->toChars());
if (fromParent) {
ctxfd = getParentFunc(ctxfd, true);
assert(ctxfd && "Context from outer function, but no outer function?");
}
Logger::println("Context is from %s", ctxfd->toChars());
unsigned neededDepth = fd->ir.irFunc->depth;
unsigned ctxDepth = ctxfd->ir.irFunc->depth;
Logger::cout() << "Needed depth: " << neededDepth << '\n';
Logger::cout() << "Context depth: " << ctxDepth << '\n';
if (neededDepth >= ctxDepth) {
// assert(neededDepth <= ctxDepth + 1 && "How are we going more than one nesting level up?");
// fd needs the same context as we do, so all is well
Logger::println("Calling sibling function or directly nested function");
} else {
val = DtoBitCast(val, LLPointerType::getUnqual(ctxfd->ir.irFunc->frameType));
val = DtoGEPi(val, 0, neededDepth);
val = DtoAlignedLoad(val, (std::string(".frame.") + fd->toChars()).c_str());
}
}
Logger::cout() << "result = " << *val << '\n';
Logger::cout() << "of type " << *val->getType() << '\n';
return val;
}
DValue* DtoNestedVariable(Loc loc, Type* astype, VarDeclaration* vd, bool byref)
{
Logger::println("DtoNestedVariable for %s @ %s", vd->toChars(), loc.toChars());
LOG_SCOPE;
////////////////////////////////////
// Locate context value
Dsymbol* vdparent = vd->toParent2();
assert(vdparent);
IrFunction* irfunc = gIR->func();
// Check whether we can access the needed frame
FuncDeclaration *fd = irfunc->decl;
while (fd != vdparent) {
if (fd->isStatic()) {
error(loc, "function %s cannot access frame of function %s", irfunc->decl->toPrettyChars(), vdparent->toPrettyChars());
return new DVarValue(astype, vd, llvm::UndefValue::get(getPtrToType(DtoType(astype))));
}
fd = getParentFunc(fd, false);
assert(fd);
}
// is the nested variable in this scope?
if (vdparent == irfunc->decl)
{
LLValue* val = vd->ir.getIrValue();
return new DVarValue(astype, vd, val);
}
LLValue *dwarfValue = 0;
std::vector<LLValue*> dwarfAddr;
LLType *int64Ty = LLType::getInt64Ty(gIR->context());
// get the nested context
LLValue* ctx = 0;
if (irfunc->decl->isMember2())
{
#if DMDV2
AggregateDeclaration* cd = irfunc->decl->isMember2();
LLValue* val = irfunc->thisArg;
if (cd->isClassDeclaration())
val = DtoLoad(val);
#else
ClassDeclaration* cd = irfunc->decl->isMember2()->isClassDeclaration();
LLValue* val = DtoLoad(irfunc->thisArg);
#endif
ctx = DtoLoad(DtoGEPi(val, 0,cd->vthis->ir.irField->index, ".vthis"));
}
else if (irfunc->nestedVar) {
ctx = irfunc->nestedVar;
dwarfValue = ctx;
} else {
ctx = DtoLoad(irfunc->nestArg);
dwarfValue = irfunc->nestArg;
if (global.params.symdebug)
dwarfOpDeref(dwarfAddr);
}
assert(ctx);
DtoCreateNestedContextType(vdparent->isFuncDeclaration());
assert(vd->ir.irLocal);
////////////////////////////////////
// Extract variable from nested context
if (nestedCtx == NCArray) {
LLValue* val = DtoBitCast(ctx, getPtrToType(getVoidPtrType()));
val = DtoGEPi1(val, vd->ir.irLocal->nestedIndex);
val = DtoAlignedLoad(val);
assert(vd->ir.irLocal->value);
val = DtoBitCast(val, vd->ir.irLocal->value->getType(), vd->toChars());
return new DVarValue(astype, vd, val);
}
else if (nestedCtx == NCHybrid) {
LLValue* val = DtoBitCast(ctx, LLPointerType::getUnqual(irfunc->frameType));
Logger::cout() << "Context: " << *val << '\n';
Logger::cout() << "of type: " << *val->getType() << '\n';
unsigned vardepth = vd->ir.irLocal->nestedDepth;
unsigned funcdepth = irfunc->depth;
Logger::cout() << "Variable: " << vd->toChars() << '\n';
Logger::cout() << "Variable depth: " << vardepth << '\n';
Logger::cout() << "Function: " << irfunc->decl->toChars() << '\n';
Logger::cout() << "Function depth: " << funcdepth << '\n';
if (vardepth == funcdepth) {
// This is not always handled above because functions without
// variables accessed by nested functions don't create new frames.
Logger::println("Same depth");
} else {
// Load frame pointer and index that...
if (dwarfValue && global.params.symdebug) {
dwarfOpOffset(dwarfAddr, val, vd->ir.irLocal->nestedDepth);
dwarfOpDeref(dwarfAddr);
}
Logger::println("Lower depth");
val = DtoGEPi(val, 0, vd->ir.irLocal->nestedDepth);
Logger::cout() << "Frame index: " << *val << '\n';
val = DtoAlignedLoad(val, (std::string(".frame.") + vdparent->toChars()).c_str());
Logger::cout() << "Frame: " << *val << '\n';
}
if (dwarfValue && global.params.symdebug)
dwarfOpOffset(dwarfAddr, val, vd->ir.irLocal->nestedIndex);
val = DtoGEPi(val, 0, vd->ir.irLocal->nestedIndex, vd->toChars());
Logger::cout() << "Addr: " << *val << '\n';
Logger::cout() << "of type: " << *val->getType() << '\n';
if (vd->ir.irLocal->byref || byref) {
val = DtoAlignedLoad(val);
//dwarfOpDeref(dwarfAddr);
Logger::cout() << "Was byref, now: " << *val << '\n';
Logger::cout() << "of type: " << *val->getType() << '\n';
}
if (dwarfValue && global.params.symdebug)
DtoDwarfLocalVariable(dwarfValue, vd, dwarfAddr);
return new DVarValue(astype, vd, val);
}
else {
assert(0 && "Not implemented yet");
}
}
void DtoCreateNestedContext(FuncDeclaration* fd) {
Logger::println("DtoCreateNestedContext for %s", fd->toChars());
LOG_SCOPE
DtoCreateNestedContextType(fd);
if (nestedCtx == NCArray) {
// construct nested variables array
if (!fd->nestedVars.empty())
{
Logger::println("has nested frame");
// start with adding all enclosing parent frames until a static parent is reached
int nparelems = 0;
if (!fd->isStatic())
{
Dsymbol* par = fd->toParent2();
while (par)
{
if (FuncDeclaration* parfd = par->isFuncDeclaration())
{
nparelems += parfd->nestedVars.size();
// stop at first static
if (parfd->isStatic())
break;
}
else if (par->isClassDeclaration())
{
// nothing needed
}
else
{
break;
}
par = par->toParent2();
}
}
int nelems = fd->nestedVars.size() + nparelems;
// make array type for nested vars
LLType* nestedVarsTy = LLArrayType::get(getVoidPtrType(), nelems);
// alloca it
// FIXME align ?
LLValue* nestedVars = DtoRawAlloca(nestedVarsTy, 0, ".nested_vars");
IrFunction* irfunction = fd->ir.irFunc;
// copy parent frame into beginning
if (nparelems)
{
LLValue* src = irfunction->nestArg;
if (!src)
{
assert(irfunction->thisArg);
assert(fd->isMember2());
LLValue* thisval = DtoLoad(irfunction->thisArg);
ClassDeclaration* cd = fd->isMember2()->isClassDeclaration();
assert(cd);
assert(cd->vthis);
src = DtoLoad(DtoGEPi(thisval, 0,cd->vthis->ir.irField->index, ".vthis"));
} else {
src = DtoLoad(src);
}
DtoMemCpy(nestedVars, src, DtoConstSize_t(nparelems*PTRSIZE),
getABITypeAlign(getVoidPtrType()));
}
// store in IrFunction
irfunction->nestedVar = nestedVars;
// go through all nested vars and assign indices
int idx = nparelems;
for (std::set<VarDeclaration*>::iterator i=fd->nestedVars.begin(); i!=fd->nestedVars.end(); ++i)
{
VarDeclaration* vd = *i;
if (!vd->ir.irLocal)
vd->ir.irLocal = new IrLocal(vd);
if (vd->isParameter())
{
Logger::println("nested param: %s", vd->toChars());
LLValue* gep = DtoGEPi(nestedVars, 0, idx);
LLValue* val = DtoBitCast(vd->ir.irLocal->value, getVoidPtrType());
DtoAlignedStore(val, gep);
}
else
{
Logger::println("nested var: %s", vd->toChars());
}
vd->ir.irLocal->nestedIndex = idx++;
}
}
}
else if (nestedCtx == NCHybrid) {
// construct nested variables array
if (!fd->nestedVars.empty())
{
IrFunction* irfunction = fd->ir.irFunc;
unsigned depth = irfunction->depth;
LLStructType *frameType = irfunction->frameType;
// Create frame for current function and append to frames list
// FIXME: alignment ?
LLValue* frame = 0;
#if DMDV2
if (fd->needsClosure())
frame = DtoGcMalloc(frameType, ".frame");
else
#endif
frame = DtoRawAlloca(frameType, 0, ".frame");
// copy parent frames into beginning
if (depth != 0) {
LLValue* src = irfunction->nestArg;
if (!src) {
assert(irfunction->thisArg);
assert(fd->isMember2());
LLValue* thisval = DtoLoad(irfunction->thisArg);
#if DMDV2
AggregateDeclaration* cd = fd->isMember2();
#else
ClassDeclaration* cd = fd->isMember2()->isClassDeclaration();
#endif
assert(cd);
assert(cd->vthis);
Logger::println("Indexing to 'this'");
#if DMDV2
if (cd->isStructDeclaration())
src = DtoExtractValue(thisval, cd->vthis->ir.irField->index, ".vthis");
else
#endif
src = DtoLoad(DtoGEPi(thisval, 0, cd->vthis->ir.irField->index, ".vthis"));
} else {
src = DtoLoad(src);
}
if (depth > 1) {
src = DtoBitCast(src, getVoidPtrType());
LLValue* dst = DtoBitCast(frame, getVoidPtrType());
DtoMemCpy(dst, src, DtoConstSize_t((depth-1) * PTRSIZE),
getABITypeAlign(getVoidPtrType()));
}
// Copy nestArg into framelist; the outer frame is not in the list of pointers
src = DtoBitCast(src, frameType->getContainedType(depth-1));
LLValue* gep = DtoGEPi(frame, 0, depth-1);
DtoAlignedStore(src, gep);
}
// store context in IrFunction
irfunction->nestedVar = frame;
// go through all nested vars and assign addresses where possible.
for (std::set<VarDeclaration*>::iterator i=fd->nestedVars.begin(); i!=fd->nestedVars.end(); ++i)
{
VarDeclaration* vd = *i;
LLValue* gep = DtoGEPi(frame, 0, vd->ir.irLocal->nestedIndex, vd->toChars());
if (vd->isParameter()) {
Logger::println("nested param: %s", vd->toChars());
LOG_SCOPE
LLValue* value = vd->ir.irLocal->value;
if (llvm::isa<llvm::AllocaInst>(llvm::GetUnderlyingObject(value))) {
Logger::println("Copying to nested frame");
// The parameter value is an alloca'd stack slot.
// Copy to the nesting frame and leave the alloca for
// the optimizers to clean up.
assert(!vd->ir.irLocal->byref);
DtoStore(DtoLoad(value), gep);
gep->takeName(value);
vd->ir.irLocal->value = gep;
} else {
Logger::println("Adding pointer to nested frame");
// The parameter value is something else, such as a
// passed-in pointer (for 'ref' or 'out' parameters) or
// a pointer arg with byval attribute.
// Store the address into the frame.
assert(vd->ir.irLocal->byref);
storeVariable(vd, gep);
}
} else if (vd->isRef() || vd->isOut()) {
// This slot is initialized in DtoNestedInit, to handle things like byref foreach variables
// which move around in memory.
assert(vd->ir.irLocal->byref);
} else {
Logger::println("nested var: %s", vd->toChars());
if (vd->ir.irLocal->value)
Logger::cout() << "Pre-existing value: " << *vd->ir.irLocal->value << '\n';
assert(!vd->ir.irLocal->value);
vd->ir.irLocal->value = gep;
assert(!vd->ir.irLocal->byref);
}
if (global.params.symdebug) {
LLSmallVector<LLValue*, 2> addr;
dwarfOpOffset(addr, frameType, vd->ir.irLocal->nestedIndex);
DtoDwarfLocalVariable(frame, vd, addr);
}
}
} else if (FuncDeclaration* parFunc = getParentFunc(fd, true)) {
// Propagate context arg properties if the context arg is passed on unmodified.
DtoDeclareFunction(parFunc);
fd->ir.irFunc->frameType = parFunc->ir.irFunc->frameType;
fd->ir.irFunc->depth = parFunc->ir.irFunc->depth;
}
}
else {
assert(0 && "Not implemented yet");
}
}
