Development Tools

-size

[Format]

-size

[Default]

Optimization is with emphasis on size.

[Description]

-	When the size option is specified, optimization will be performed with emphasis on code size.

[Remarks]

-	When the size option is specified, the following options are automatically specified based on the optimize option specification. Note however that if one of the following options is specified otherwise explicitly, that specified option becomes valid.

The processing for optimization in response to the optimization level selected for the optimize option includes the fine adjustment of many items other than those that can be specified through compiler options. Code produced with different levels of optimization will differ in the ways set by the compiler options listed in the tables below, but will also not match in other ways.

Optimization item	optimize=0 optimize=1	optimize=2	optimize=max
Loop Expansion	loop=1	loop=1	loop=1
Inline Expansion	noinline	noinline	inline=0
Converting Constant Division into Multiplication	noconst_div	noconst_div	noconst_div
Scheduling Instructions	noschedule	schedule	schedule
Constant Propagation of const Qualified Variables	noconst_copy	const_copy	const_copy
Dividing Optimizing Ranges	scope	scope	noscope
Optimizing External Variable Accesses	nomap	nomap	map* nomap*
Optimization Considering the Type of the Data Indicated by the Pointer	alias=noansi	alias=noansi	alias=ansi
Optimization by Reducing the Branch Instruction Size	nobranch_chaining	branch_chaining	branch_chaining

Note	The default is map when a C/C++ source program has been specified for input and output=abs or output=mot has been specified for output. For any other case, the default is nomap.