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// slang-ir-lower-generic-type.cpp
#include "slang-ir-lower-generic-type.h"
#include "slang-ir-clone.h"
#include "slang-ir-generics-lowering-context.h"
#include "slang-ir-insts.h"
#include "slang-ir.h"
namespace Slang
{
// This is a subpass of generics lowering IR transformation.
// This pass lowers all generic/polymorphic types into IRAnyValueType.
struct GenericTypeLoweringContext
{
SharedGenericsLoweringContext* sharedContext;
IRInst* processInst(IRInst* inst)
{
// Ensure exported struct types has RTTI object defined.
if (as<IRStructType>(inst))
{
if (inst->findDecoration<IRHLSLExportDecoration>())
{
sharedContext->maybeEmitRTTIObject(inst);
}
}
// Don't modify type insts themselves.
if (as<IRType>(inst))
return inst;
IRBuilder builderStorage(sharedContext->module);
auto builder = &builderStorage;
builder->setInsertBefore(inst);
auto newType = sharedContext->lowerType(builder, inst->getFullType());
if (newType != inst->getFullType())
inst = builder->replaceOperand(&inst->typeUse, newType);
switch (inst->getOp())
{
default: break;
case kIROp_StructField:
{
// Translate the struct field type.
auto structField = static_cast<IRStructField*>(inst);
auto loweredFieldType =
sharedContext->lowerType(builder, structField->getFieldType());
structField->setOperand(1, loweredFieldType);
}
break;
}
return inst;
}
void processModule()
{
sharedContext->addToWorkList(sharedContext->module->getModuleInst());
while (sharedContext->workList.getCount() != 0)
{
IRInst* inst = sharedContext->workList.getLast();
sharedContext->workList.removeLast();
sharedContext->workListSet.remove(inst);
inst = processInst(inst);
for (auto child = inst->getLastChild(); child; child = child->getPrevInst())
{
sharedContext->addToWorkList(child);
}
}
sharedContext->mapInterfaceRequirementKeyValue.clear();
}
};
void lowerGenericType(SharedGenericsLoweringContext* sharedContext)
{
GenericTypeLoweringContext context;
context.sharedContext = sharedContext;
context.processModule();
}
} // namespace Slang
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