User defined callback to optimize individual microcode instructions. More...

#include <hexrays.hpp>

Public Member Functions
virtual int	func (mblock_t blk, minsn_t ins, int optflags)=0
	Optimize an instruction. More...

Detailed Description

User defined callback to optimize individual microcode instructions.

Definition at line 2108 of file hexrays.hpp.

Member Function Documentation

pure virtual

Optimize an instruction.

Parameters

blk	current basic block. maybe nullptr, which means that the instruction must be optimized without context
ins	instruction to optimize; it is always a top-level instruction. the callback may not delete the instruction but may convert it into nop (see mblock_t::make_nop). to optimize sub-instructions, visit them using minsn_visitor_t. sub-instructions may not be converted into nop but can be converted to "mov x,x". for example: add x,0,x => mov x,x this callback may change other instructions in the block, but should do this with care, e.g. to no break the propagation algorithm if called with OPTI_NO_LDXOPT.
optflags	combination of optimization flags bits

Returns: number of changes made to the instruction. if after this call the instruction's use/def lists have changed, you must mark the block level lists as dirty (see mark_lists_dirty)