[Bug bootstrap/43170] gcc 4.5 20100218 bootstrap compare fails on os x 10.6

[iains at gcc dot gnu dot org]

------- Comment #56 from iains at gcc dot gnu dot org  2010-06-02 22:07 -------
(In reply to comment #55)
> > and on D10 - no @ stage1 (correct)
> 
> I see
> 
> [macbook] gcc/build_w% grep -i tls
> stage1-x86_64-apple-darwin10.3.0/libgomp/config.log
> | #define HAVE_TLS 1
> | #define HAVE_TLS 1
> | #define HAVE_TLS 1
> | #define HAVE_TLS 1
> gcc_cv_have_tls=yes

then, I guess you are not bootstrapping from Apple's compiler - since that
doesn't have TLS,.
You must have a gcc > 4.4 in your path (which might cause some confusion on
ocassion).

> #define HAVE_TLS 1
> [macbook] gcc/build_w% grep -i tls
> stage1-x86_64-apple-darwin10.3.0/i386/libgomp/config.log
> | #define HAVE_TLS 1
> | #define HAVE_TLS 1
> | #define HAVE_TLS 1
> | #define HAVE_TLS 1
> gcc_cv_have_tls=yes
> #define HAVE_TLS 1
> 
> > so... something is not right with one or the other.. and it looks like it's the
> > x86_64 that's dodgy.
> 
> I hope I don't have any leftover from previous patches!-) I think so, but I may
> have missed something.
> 
> > The better news is that the 'proper' fix @PR44132 does ;)
> 
> I have applied the 'proper' fix, the number of failures under load has been
> reduced from ~1/3 to ~1/2000, but still nonzero!-(

It seems that we must have 
(a)  code-gen issue (OR
(b) a buggy pthreads implementation on D10 :(

I had a quick look at the asm out from O0 and O1 .. there's one odd instruction
..  but nothing leaps out at me yet,,,

> 
> > (but there is still one "TODO" on that).
> 
> and I see the TODO:
> 
> FAIL: gcc.dg/tls/asm-1.c (internal compiler error)
> FAIL: gcc.dg/tls/asm-1.c  (test for errors, line 7)
> FAIL: gcc.dg/tls/asm-1.c (test for excess errors)

Indeed, I am hoping for some help from Honza on that (I think it is actually
exposing an assumption on the part of gimplify_asm() that is incorrect).


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43170