[PATCH] PR rtl-optimization/32219: optimizer causees wrong code in pic/hidden/weak symbol checking

[H.J. Lu]

On Wed, Feb 11, 2015 at 10:22 PM, Richard Henderson <rth@redhat.com> wrote:
> On 02/10/2015 01:19 PM, Richard Henderson wrote:
>> As an existing issue, I'm not sure why "specified" visibility is any different
>> from unspecified visibility.  As far as I'm aware, the "specified" bit simply
>> means that the decl doesn't inherit inherit visibility from the class, or from
>> the command-line.  But once we're this far, the visibility actually applied to
>> the symbol should be all that matters.
>
> The test is there to differentiate explicit visibility from that implied from
> the command-line.  Without it, we assume hidden visibility for external symbols
> too early, making the command-line option useless.  This is visible even in
> building libgcc.
>
> I believe this set of patches does what we want, and cleans things up a bit in
> the process.
>
>

I tried them on Linux/x86-64.  They caused:

FAIL: g++.dg/gomp/tls-wrap4.C  -std=gnu++11  scan-assembler-not _ZTW1i@PLT
FAIL: g++.dg/gomp/tls-wrap4.C  -std=gnu++11  scan-assembler-not _ZTW1i@PLT
FAIL: g++.dg/gomp/tls-wrap4.C  -std=gnu++14  scan-assembler-not _ZTW1i@PLT
FAIL: g++.dg/gomp/tls-wrap4.C  -std=gnu++14  scan-assembler-not _ZTW1i@PLT
FAIL: g++.dg/tls/thread_local-wrap4.C  -std=gnu++11
scan-assembler-not _ZTW1i@PLT
FAIL: g++.dg/tls/thread_local-wrap4.C  -std=gnu++11
scan-assembler-not _ZTW1i@PLT
FAIL: g++.dg/tls/thread_local-wrap4.C  -std=gnu++14
scan-assembler-not _ZTW1i@PLT
FAIL: g++.dg/tls/thread_local-wrap4.C  -std=gnu++14
scan-assembler-not _ZTW1i@PLT


-- 
H.J.