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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--diag_warning=optimizations
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Home > Compiler Command-line Options > Command-line options > --diag_warning=optimizations | |||
This option sets high‑level optimization diagnostic messages to have Warning severity.
The compiler performs certain high‑level vector and scalar optimizations when compiling at the optimization level -O3 -Otime, for example, loop unrolling. Use this option to display diagnostic messages relating to these high‑level optimizations.
int factorial(int n)
{
int result=1;
while (n > 0)
result *= n--;
return result;
}
Compiling this code with the options --device=DARMP -O3 -Otime --diag_warning=optimizations generates optimization warning messages.
| Copyright © 2007 ARM Limited. All rights reserved. | ARM DUI 0376A |
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