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RealView Compiler Reference Guide
Preface Introduction Compiler Command-line Options Command-line options
‑Aopt ‑‑[no_]alternative_tokens ‑‑[no_]anachronisms --apcs=qualifer...qualifier ‑‑arm ‑‑asm ‑‑[no_]autoinline ‑‑bigend ‑‑[no_]brief_diagnostics --bss_threshold=num ‑c ‑C ‑‑c90 ‑‑c99 ‑‑[no_]code_gen --[no_]compile_all_input ‑‑cpp ‑‑create_pch=filename ‑Dname[(parm-list)][=def] ‑‑[no_]data_reorder ‑‑[no_]debug ‑‑[no_]debug_macros ‑‑default_extension=ext ‑‑[no_]dep_name ‑‑depend=filename ‑‑depend_format=string --[no_]depend_system_headers ‑‑device=list ‑‑device=name --device_opt=option ‑‑diag_error=tag[,tag,...] ‑‑diag_remark=tag[,tag,... ] ‑‑diag_style={arm|ide|gnu} ‑‑diag_suppress=tag[,tag,...] --diag_suppress=optimizations ‑‑diag_warning=tag[,tag,...] --diag_warning=optimizations ‑‑[no_]dollar ‑‑dwarf2 ‑‑dwarf3 ‑E ‑‑enum_is_int ‑‑errors=filename ‑‑[no_]exceptions ‑‑[no_]exceptions_unwind ‑‑[no_]export_all_vtbl ‑‑[no_]export_defs_implicitly --[no_]extended_initializers ‑‑feedback=filename --[no_]force_new_nothrow ‑‑forceinline ‑‑fpmode=model ‑‑fpu=list ‑‑fpu=name ‑‑[no_]friend_injection ‑‑gnu ‑‑[no_]guiding_decls ‑‑help ‑‑[no_]hide_all ‑Idir[,dir,...] ‑‑[no_]implicit_include --[no_]implicit_include_searches ‑‑[no_]implicit_typename ‑‑info=totals ‑‑[no_]inline ‑‑interleave ‑Jdir[,dir,...] ‑‑kandr_include ‑Lopt ‑‑library_interface=lib --library_type=lib ‑‑list ‑‑littleend ‑‑locale=lang_country ‑‑loose_implicit_cast ‑‑[no_]lower_ropi ‑‑[no_]lower_rwpi ‑M ‑‑md ‑‑message_locale=lang_country[.codepage] ‑‑min_array_alignment=opt ‑‑[no_]multibyte_chars ‑‑[no_]multifile ‑‑[no_]nonstd_qualifier_deduction ‑o filename ‑Onum ‑‑[no_]old_specializations -‑omf_browse ‑Ospace ‑Otime ‑‑[no_]parse_templates ‑‑pch ‑‑pch_dir=dir ‑‑[no_]pch_messages ‑‑[no_]pch_verbose ‑‑pending_instantiations=n ‑‑pointer_alignment=num --[no_]project=filename ‑‑preinclude=filename --[no_]reduce_paths --reinitialize_workdir ‑‑remarks ‑‑[no_]restrict ‑‑[no_]rtti ‑S ‑‑[un]signed_bitfields ‑‑[un]signed_chars ‑‑show_cmdline ‑‑split_ldm ‑‑split_sections ‑‑[no_]strict ‑‑strict_warnings ‑‑sys_include ‑‑thumb ‑Uname ‑‑[no_]unaligned_access ‑‑use_pch=filename ‑‑[no_]using_std ‑‑[no_]vfe ‑‑via=filename --[no_]vla ‑‑vsn ‑W --wchar16 --wchar32 --workdir=directory ‑‑[no_]wrap_diagnostics Language Extensions Compiler-specific Features C and C++ Implementation Details Via File Syntax Standard C Implementation Definition Standard C++ Implementation Definition C and C++ Compiler Implementation Limits‑Otime
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Home > Compiler Command-line Options > Command-line options > ‑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.
When the -Otime option is selected, the compiler compiles:
while (expression)body;
as:
if (expression) { dobody; while (expression); }
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