[Bug target/50077] New: FAIL: gcc.target/i386/pr49866.c (test for excess errors) on x86_64-apple-darwin10

[Bug target/50077] New: FAIL: gcc.target/i386/pr49866.c (test for excess errors) on x86_64-apple-darwin10

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50077

             Bug #: 50077
           Summary: FAIL: gcc.target/i386/pr49866.c (test for excess
                    errors) on x86_64-apple-darwin10
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: dominiq@lps.ens.fr
                CC: iains@gcc.gnu.org, jakub@gcc.gnu.org,
                    ubizjak@gmail.com
              Host: x86_64-apple-darwin10
            Target: x86_64-apple-darwin10
             Build: x86_64-apple-darwin10


On x86_64-apple-darwin10 gcc.target/i386/pr49866.c fails with

[macbook] f90/bug% gcc47 -O2 -mcmodel=large
/opt/gcc/work/gcc/testsuite/gcc.target/i386/pr49866.c
/var/folders/LW/LW1oufkMGIqlLpjYn45fBU+++TI/-Tmp-//ccCXYFLc.s:10:junk `@PLTOFF'
after expression
/var/folders/LW/LW1oufkMGIqlLpjYn45fBU+++TI/-Tmp-//ccCXYFLc.s:32:junk `@PLTOFF'
after expression
/var/folders/LW/LW1oufkMGIqlLpjYn45fBU+++TI/-Tmp-//ccCXYFLc.s:34:junk `@PLTOFF'
after expression
/var/folders/LW/LW1oufkMGIqlLpjYn45fBU+++TI/-Tmp-//ccCXYFLc.s:48:junk `@PLTOFF'
after expression

The test has been introduced at revision 176842, but fails for all the gcc
versions I have tried from 4.4.6 to trunk.

[Bug target/50077] FAIL: gcc.target/i386/pr49866.c (test for excess errors) on x86_64-apple-darwin10

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50077

--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2012-01-09 21:45:19 UTC ---
I have tested the  -mcmodel=large option on some simple C tests and I got the
same kind of failures.
So -mcmodel=large seems broken on x86_64-apple-darwin10 (gcc 4.4.6, 4.5.3, and
4.6.2).

gcc version 4.2.1 (Apple Inc. build 5666) (dot 3)

gives for

[macbook] f90/bug% cat sin.c
#include <stdio.h>
#include <math.h>

unsigned int ta;

main ()
{
  double result;
  for (ta = 1; ta <= 8000000; ta++)
    {
      result = sin(ta * 3.14159);
    }
  printf("result = \t%.13e\n", result);
}

sin.c:1: sorry, unimplemented: code model large not supported in PIC mode
sin.c:1: error: code model 'large' not supported in the 64 bit mode

[Bug target/50077] FAIL: gcc.target/i386/pr49866.c (test for excess errors) on x86_64-apple-darwin10

[iains at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50077

Iain Sandoe <iains at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|x86_64-apple-darwin10       |x86_64-apple-darwin10,
                   |                            |i?86-apple-darwin9
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-02-02
               Host|x86_64-apple-darwin10       |
     Ever Confirmed|0                           |1
              Build|x86_64-apple-darwin10       |

--- Comment #2 from Iain Sandoe <iains at gcc dot gnu.org> 2012-02-02 11:40:03 UTC ---
Fails at m64 on i686-darwin9 too.

the code below is obviously incorrect for m64 x86 Darwin;  so, we just don't
handle the large model.

        movabsq $_GLOBAL_OFFSET_TABLE_-L7, %r11
        pushq   %r15
LCFI0:
        movq    %rcx, %r15
        movabsq $_baz@PLTOFF, %rax
        pushq   %r14
LCFI1:
        movabsq $_fn2@PLTOFF, %r14
        pushq   %r13
LCFI2:
        movabsq $_fn@PLTOFF, %r13
        pushq   %r12

------

clang seems to support -mcmodel=large - at least at 3.1 - so any necessary
ld64/dyld support is available.

This is not likely to get fixed in the short term (certainly not in stage 4) -
so we'll have to decide between XFAIL/tolerate the noise in the error logs.

[Bug target/50077] FAIL: gcc.target/i386/pr49866.c (test for excess errors) on x86_64-apple-darwin10

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50077

--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2012-02-02 16:06:05 UTC ---
> clang seems to support -mcmodel=large - at least at 3.1 - so any necessary
> ld64/dyld support is available.

The test compiles (using -c) with

Apple clang version 1.7 (tags/Apple/clang-77) (based on LLVM 2.9svn)

> This is not likely to get fixed in the short term (certainly not in stage 4) -
> so we'll have to decide between XFAIL/tolerate the noise in the error logs.

When XFAILed, this kind of bug disappears from the radar scopes and tends to
rot forever (see pr10901) until it resurfaces in a nasty way. I'ld prefer to
change the summary to something such as "large model is broken on
*86*-apple-darwin*" to point to the real problem.

[Bug target/50077] FAIL: gcc.target/i386/pr49866.c (test for excess errors) on x86_64-apple-darwin1*

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50077

Dominique d'Humieres <dominiq at lps dot ens.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|x86_64-apple-darwin10,      |x86_64-apple-darwin1*,
                   |i?86-apple-darwin9          |i?86-apple-darwin9
            Summary|FAIL:                       |FAIL:
                   |gcc.target/i386/pr49866.c   |gcc.target/i386/pr49866.c
                   |(test for excess errors) on |(test for excess errors) on
                   |x86_64-apple-darwin10       |x86_64-apple-darwin1*

--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Also seen on x86_64-apple-darwin14.