RealView Compilation Tools Compiler Reference Guide - ARM ...

Compiler Command-line Options
Default
If you do not specify either -Ospace or -Otime, the compiler assumes -Ospace.
See also
• -Otime
• -Onum on page 2-66
• #pragma Onum on page 4-57
• #pragma Ospace on page 4-58
• #pragma Otime on page 4-58.
2.1.90 -Otime
This option instructs the compiler to perform optimizations to reduce execution time at
the expense of a possible increase in image size.
Use this option if execution time is more critical than code size. If required, you can
compile the time-critical parts of your code with -Otime, and the rest with -Ospace.
Default
If you do not specify -Otime, the compiler assumes -Ospace.
Example
When the -Otime option is selected, the compiler compiles:
while (expression) body;
as:
if (expression)
{
do body;
while (expression);
}
See also
• --[no_]multifile on page 2-63
• -Onum on page 2-66
• -Ospace on page 2-68
• #pragma Onum on page 4-57
• #pragma Ospace on page 4-58
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