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Re: [PATCH 1/2] tcg: Mark more tcg_out*() functions with attribute 'unus

From: Philippe Mathieu-Daudé
Subject: Re: [PATCH 1/2] tcg: Mark more tcg_out*() functions with attribute 'unused'
Date: Sun, 10 Jan 2021 22:01:57 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0

On 1/10/21 6:51 PM, Richard Henderson wrote:
> On 1/10/21 6:27 AM, Philippe Mathieu-Daudé wrote:
>> The tcg_out* functions are utility routines that may or
>> may not be used by a particular backend. Similarly to commit
>> 4196dca63b8, mark them with the 'unused' attribute to suppress
>> spurious warnings if they aren't used.
>> This fixes the build with --enable-tcg-interpreter:
>>   [98/151] Compiling C object libqemu-arm-softmmu.fa.p/tcg_tcg.c.o
>>   FAILED: libqemu-arm-softmmu.fa.p/tcg_tcg.c.o
>>   clang [...] -o libqemu-arm-softmmu.fa.p/tcg_tcg.c.o -c ../tcg/tcg.c
>>   ../tcg/tcg.c:136:20: error: unused function 'tcg_out_dupi_vec' 
>> [-Werror,-Wunused-function]
>> Reported-by: Wataru Ashihara <wataash@wataash.com>
>> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
>> ---
>>  tcg/tcg.c | 30 +++++++++++++++++++++---------
>>  1 file changed, 21 insertions(+), 9 deletions(-)
> This does too much to fix that Werror, as all of the other functions are
> unconditionally used.
> Alternately, I'll re-test and merge my tcg constant branch, which will make
> tcg_out_dupi_vec also unconditionally used.  Then we don't need
> __attribute__((unused)) at all.

OK, better then.



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