[BUILDROBOT] x86_64: Segmentation fault during -fself-test (was: Implement C _FloatN, _FloatNx types [version 6]

[Jan-Benedict Glaw <jbglaw at lug-owl dot de>]

Hi Joseph!

On Wed, 2016-08-17 20:17:07 +0000, Joseph Myers <joseph@codesourcery.com> wrote:
[...]
> ISO/IEC TS 18661-3:2015 defines C bindings to IEEE interchange and
> extended types, in the form of _FloatN and _FloatNx type names with
> corresponding fN/FN and fNx/FNx constant suffixes and FLTN_* / FLTNX_*
> <float.h> macros.  This patch implements support for this feature in
> GCC.

Between dee8cef0c1c1ebf85fceb5c37996ed12a2bec352 (Fri Aug 19 15:42:11
2016 +0000) and 82c85aba845985e55c27a7a9c448810d433adb17 (Fri Aug 19
17:43:26 2016 +0000), a new build regression for
x86_64-{linux,rtems,elf} showed up and I think this patch caused it.
It occurs during GCC's self-test while it's setting up it's FP types:


/scratch/4/jbglaw/regular/build/x86_64-elf/build-gcc/./gcc/xgcc -B/scratch/4/jbglaw/regular/build/x86_64-elf/build-gcc/./gcc/ -xc -S -c /dev/null -fself-test
<built-in>: internal compiler error: Segmentation fault
0xb7803f crash_signal
/scratch/4/jbglaw/regular/repos/gcc/gcc/toplev.c:335
0x687952 tree_class_check
/scratch/4/jbglaw/regular/repos/gcc/gcc/tree.h:3145
0x687952 c_register_builtin_type(tree_node*, char const*)
/scratch/4/jbglaw/regular/repos/gcc/gcc/c-family/c-common.c:3876
0xeb6b36 ix86_init_builtin_types
/scratch/4/jbglaw/regular/repos/gcc/gcc/config/i386/i386.c:33351
0xeb6b36 ix86_init_builtins
/scratch/4/jbglaw/regular/repos/gcc/gcc/config/i386/i386.c:33366
0x6a8006 c_define_builtins
/scratch/4/jbglaw/regular/repos/gcc/gcc/c-family/c-common.c:5282
0x6a8006 c_common_nodes_and_builtins()
/scratch/4/jbglaw/regular/repos/gcc/gcc/c-family/c-common.c:5750
0x5ef719 c_init_decl_processing()
/scratch/4/jbglaw/regular/repos/gcc/gcc/c/c-decl.c:4097
0x63caf8 c_objc_common_init()
/scratch/4/jbglaw/regular/repos/gcc/gcc/c/c-objc-common.c:58
0x5de4c2 lang_dependent_init
/scratch/4/jbglaw/regular/repos/gcc/gcc/toplev.c:1766
0x5de4c2 do_compile
/scratch/4/jbglaw/regular/repos/gcc/gcc/toplev.c:1989
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[1]: *** [s-selftest] Error 1



See eg. build http://toolchain.lug-owl.de/buildbot/show_build_details.php?id=608741


MfG, JBG


-- 
      Jan-Benedict Glaw      jbglaw@lug-owl.de              +49-172-7608481
  Signature of:                           Wenn ich wach bin, träume ich.
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