[LLVMdev] piping into lli broken on darwin

[Jack Howarth]

On Wed, Oct 31, 2012 at 03:53:50PM -0700, Eli Friedman wrote:
> On Wed, Oct 31, 2012 at 8:43 AM, Jack Howarth <howarth at bromo.med.uc.edu> wrote:
> >   While testing llvm/polly svn on x86_64-apple-darwin10/11/12, I noticed that three darwin
> > specific polly-test regressions exist. At least part of these failures appear to be due
> > to lli on darwin not accepting piped input such that the test...
> >
> > opt -load /sw/src/fink.build/llvm32-3.2-0/llvm-3.2/build/lib/LLVMPolly.so
> > -basicaa -polly-prepare -polly-region-simplify -O3
> > /sw/src/fink.build/llvm32-3.2-0/llvm-3.2/tools/polly/test/CodeGen/single_do_loop_int_max_iterations.ll
> > | lli
> >
> > produces the error...
> >
> > LLVM ERROR: Could not resolve external global address: stdout
> 
> This error means you're generating a reference to a symbol named
> stdout, which does not exist on OS X.  Why do you think this is a bug
> in lli?

Eli,
   What about the output that I see from bugpoint...

http://llvm.org/bugs/show_bug.cgi?id=14142#c4

which seems to suggest that the actual problem is an alignment issue.

ugpoint-test-program.bc.llc.s.gcc.exe -lm -O2
bugpoint-test-program.bc:4:Alignment too large: 15. assumed.
bugpoint-test-program.bc:5:Unknown pseudo-op: .type
bugpoint-test-program.bc:5:Rest of line ignored. 1st junk character valued 115

This smells like the issues I solved in gnutls...

http://savannah.gnu.org/support/?107983

where .align was being used instead of the more appropriate .balign (since i386/x86_64 darwin doesn't support
.align > 15) as well as the unsupported .type (and perhaps .size) assembly being used on darwin.
         Jack

> 
> -Eli