SRetFunction< SignatureT, DerivedFunction > Struct Template Reference

Templated interface class for SRET functions. This struct provides the interface for functions that wish to return arrays (vectors or matrices) by internally remapping the first argument for the user. As far as LLVM and any bindings are concerned, the function signature remains unchanged - however the first argument becomes "invisible" to the user and is instead allocated by LLVM before the function is executed. Importantly, the argument has no impact on the user facing AX signature and doesn't affect declaration selection. More...

#include <openvdb_ax/codegen/FunctionTypes.h>

Inherits DerivedFunction.

Public Types
using	Ptr = std::shared_ptr< SRetFunction< SignatureT, DerivedFunction >>
using	Traits = FunctionTraits< SignatureT >

Public Member Functions
Function::SignatureMatch	match (const std::vector< llvm::Type * > &args, llvm::LLVMContext &C) const override
	Override of match which inserts the SRET type such that the base class methods ignore it. More...
llvm::Value *	call (const std::vector< llvm::Value * > &args, llvm::IRBuilder<> &B, const bool cast) const override
	Override of call which allocates the required SRET llvm::Value for this function. More...
void	print (llvm::LLVMContext &C, std::ostream &os, const char *name=nullptr, const bool axTypes=true) const override
	Override of print to avoid printing out the SRET type. More...

Protected Member Functions
template<typename... Args>
	SRetFunction (Args &&...ts)
	Forward all arguments to the derived class. More...

Detailed Description

template<typename SignatureT, typename DerivedFunction>
struct openvdb::v9_0::ax::codegen::SRetFunction< SignatureT, DerivedFunction >

Templated interface class for SRET functions. This struct provides the interface for functions that wish to return arrays (vectors or matrices) by internally remapping the first argument for the user. As far as LLVM and any bindings are concerned, the function signature remains unchanged - however the first argument becomes "invisible" to the user and is instead allocated by LLVM before the function is executed. Importantly, the argument has no impact on the user facing AX signature and doesn't affect declaration selection.

Note

This class is not intended to be instantiated directly, but instead used by derived implementation which hold a valid implementations of member functions required to create a llvm::Function (such as Function::types and Function::call). This exists as an interface to avoid virtual inheritance.

Member Typedef Documentation

using Ptr = std::shared_ptr<SRetFunction<SignatureT, DerivedFunction>>

using Traits = FunctionTraits<SignatureT>

Constructor & Destructor Documentation

SRetFunction ( Args &&...  ts )

inlineprotected

Forward all arguments to the derived class.

Member Function Documentation

llvm::Value* call ( const std::vector< llvm::Value * > &  args, llvm::IRBuilder<> &  B, const bool  cast  ) const

inlineoverride

Override of call which allocates the required SRET llvm::Value for this function.

Note

Unlike other function where the returned llvm::Value* is a llvm::CallInst (which also represents the return value), SRET functions return the allocated 1st argument i.e. not a llvm::CallInst

Function::SignatureMatch match ( const std::vector< llvm::Type * > &  args, llvm::LLVMContext &  C  ) const

inlineoverride

Override of match which inserts the SRET type such that the base class methods ignore it.

void print ( llvm::LLVMContext &  C, std::ostream &  os, const char *  name = nullptr, const bool  axTypes = true  ) const

inlineoverride

Override of print to avoid printing out the SRET type.