target::Codegen Class Reference

Abstract a Code Generator. More...

#include <codegen.hh>

Collaboration diagram for target::Codegen:

Public Member Functions
void	emit (assem::Instr *instr)
	Append instr to the list of built instructions.
void	emit (assem::Instrs instrs)
	Append instrs to the list of built instructions.
Ctor & dtor.
	Codegen (bool rule_trace_p=false)
	Construct a Codegen.
virtual	~Codegen ()
	Destroy a Codegen.

Protected Attributes
frame::Frame *	frame_
	Current frame may be resized for function's arguments.
bool	rule_trace_p_
	Print rules when redicing.

Private Attributes
assem::Instrs	instrs_
	The list of being built instructions.

Code generation engine.
assem::Instrs &	codegen (const tree::rStm &stm, frame::Frame &frame)
	Generate code.
virtual void	fragment_entry_exit_build (assem::ProcFrag &frag)=0
	Build part of the prologue and epilogue of the function.
virtual void	frame_build (assem::ProcFrag &frag) const =0
	Allocate the frame.
virtual void	rewrite_program (assem::ProcFrag &frag, const temp::temp_set_type &spilled) const =0
	Rewrite the code to spill the spilled.
virtual void	codegen (const tree::rStm &root)=0
	Launch code generation on the root statement.

Accessors.
frame::Frame &	frame_get ()
	Access the abstract frame.
assem::Instrs &	instrs_get ()
	Access the list of built/being built instructions.

Detailed Description

Abstract a Code Generator.

Constructor & Destructor Documentation

target::mips::Codegen::Codegen ( bool  rule_trace_p = false )

inline

Construct a Codegen.

target::mips::Codegen::~Codegen ( )

virtual

Destroy a Codegen.

Member Function Documentation

virtual void target::Codegen::codegen ( const tree::rStm &  root )

protectedpure virtual

Launch code generation on the root statement.

Referenced by codegen().

assem::Instrs & target::Codegen::codegen	(	const tree::rStm &	stm,
		frame::Frame &	frame
	)

Generate code.

References assertion, codegen(), frame_, and instrs_.

void target::Codegen::emit ( assem::Instr *  instr )

inline

Append instr to the list of built instructions.

References instrs_.

void target::Codegen::emit ( assem::Instrs  instrs )

inline

Append instrs to the list of built instructions.

References instrs_.

void target::mips::Codegen::fragment_entry_exit_build ( assem::ProcFrag &  frag )

pure virtual

Build part of the prologue and epilogue of the function.

Free the callee save registers, and receive the arguments. Called as soon as the function body was translated. This is called "procEntryExit1" by Appel.

References assem::ProcFrag::frame_get(), assem::ProcFrag::instrs_get(), assem::ProcFrag::label_get(), and temp::Identifier< Traits_ >::string_get().

void target::mips::Codegen::frame_build ( assem::ProcFrag &  frag ) const

pure virtual

Allocate the frame.

Called at the end, after register allocation, since the frame size depends upon it. This is Appel's "procEntryExit3".

References assertion, assem::ProcFrag::frame_get(), assem::ProcFrag::instrs_get(), and assem::Instrs::label_find().

frame::Frame & target::Codegen::frame_get ( )

inline

Access the abstract frame.

References frame_.

assem::Instrs & target::Codegen::instrs_get ( )

inlineprotected

Access the list of built/being built instructions.

References instrs_.

void target::mips::Codegen::rewrite_program ( assem::ProcFrag &  frag, const temp::temp_set_type &  spilled  ) const

pure virtual

Rewrite the code to spill the spilled.

During register allocation, some temps could not be allocated a register and are spilled: rewrite the code to handle them (load and store where needed).

Referenced by regalloc::RegisterAllocator::operator()().

Member Data Documentation

frame::Frame* target::Codegen::frame_

protected

Current frame may be resized for function's arguments.

Referenced by codegen(), and frame_get().

assem::Instrs target::Codegen::instrs_

private

The list of being built instructions.

Referenced by codegen(), emit(), and instrs_get().

bool target::Codegen::rule_trace_p_

protected

Print rules when redicing.

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The documentation for this class was generated from the following files:

• target/codegen.hh
• target/codegen.cc
• target/codegen.hxx
• target/ia32/epilogue.cc
• target/mips/epilogue.cc