[Bug ipa/64730] New: g++.dg/ipa/pr64049-1.C ICE: SEGV when printing NULL

["ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64730

            Bug ID: 64730
           Summary: g++.dg/ipa/pr64049-1.C ICE: SEGV when printing NULL
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: ipa
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ro at gcc dot gnu.org
              Host: *-*-solaris2.10
            Target: *-*-solaris2.10
             Build: *-*-solaris2.10

As reported in

https://gcc.gnu.org/ml/gcc-patches/2015-01/msg01889.html

this change

2015-01-15  Naveen H.S  <Naveen.Hurugalawadi@caviumnetworks.com>

       * ipa-inline.c (inline_small_functions): Swap the operands in
       enum.

caused a couple of testsuite failures on Solaris 10:

FAIL: g++.dg/ipa/pr64049-1.C  -std=gnu++11 (internal compiler error)
FAIL: g++.dg/ipa/pr64049-1.C  -std=gnu++11 (test for excess errors)
FAIL: g++.dg/ipa/pr64049-1.C  -std=gnu++14 (internal compiler error)
FAIL: g++.dg/ipa/pr64049-1.C  -std=gnu++14 (test for excess errors)
FAIL: g++.dg/ipa/pr64049-1.C  -std=gnu++98 (internal compiler error)
FAIL: g++.dg/ipa/pr64049-1.C  -std=gnu++98 (test for excess errors)

/vol/gcc/src/hg/trunk/local/gcc/testsuite/g++.dg/ipa/pr64049-1.C:34:1: internal
compiler error: Segmentation Fault
0x88b777c crash_signal
        /vol/gcc/src/hg/trunk/local/gcc/toplev.c:381

  cc1plus -fpreprocessed pr64049-1.ii -quiet -O3 -fdump-ipa-inline -o
pr64049-1.s

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
0xfee0645c in strlen () from /lib/libc.so.1
(gdb) where
#0  0xfee0645c in strlen () from /lib/libc.so.1
#1  0xfee61aee in _ndoprnt () from /lib/libc.so.1
#2  0xfee6469e in fprintf () from /lib/libc.so.1
#3  0x08ed5f04 in inline_small_functions ()
    at /vol/gcc/src/hg/trunk/local/gcc/ipa-inline.c:1718
#4  0x08ed84e4 in ipa_inline ()
    at /vol/gcc/src/hg/trunk/local/gcc/ipa-inline.c:2178
#5  (anonymous namespace)::pass_ipa_inline::execute (this=<optimized out>)
    at /vol/gcc/src/hg/trunk/local/gcc/ipa-inline.c:2550
#6  0x087f94b3 in execute_one_pass (pass=0x98f7fd0)
    at /vol/gcc/src/hg/trunk/local/gcc/passes.c:2326
#7  0x087f9fdd in execute_ipa_pass_list (pass=0x98f7fd0)
    at /vol/gcc/src/hg/trunk/local/gcc/passes.c:2723
#8  0x0850cd02 in ipa_passes ()
    at /vol/gcc/src/hg/trunk/local/gcc/cgraphunit.c:2133
#9  symbol_table::compile (this=this@entry=0xfea09000)
    at /vol/gcc/src/hg/trunk/local/gcc/cgraphunit.c:2221
#10 0x0850eda7 in compile (this=0xfea09000)
    at /vol/gcc/src/hg/trunk/local/gcc/timevar.h:110
#11 symbol_table::finalize_compilation_unit (this=0xfea09000)
    at /vol/gcc/src/hg/trunk/local/gcc/cgraphunit.c:2370
#12 0x082fcd2e in cp_write_global_declarations ()
    at /vol/gcc/src/hg/trunk/local/gcc/cp/decl2.c:4750
#13 0x088b7819 in compile_file ()
    at /vol/gcc/src/hg/trunk/local/gcc/toplev.c:606
#14 0x091fa5e9 in do_compile ()
    at /vol/gcc/src/hg/trunk/local/gcc/toplev.c:2045
#15 toplev::main (this=0x804759f, argc=8, argv=0x80475e0)
    at /vol/gcc/src/hg/trunk/local/gcc/toplev.c:2142
#16 0x091fb27f in main (argc=8, argv=0x80475e0)
    at /vol/gcc/src/hg/trunk/local/gcc/main.c:38

On Solaris 11 and Linux, I find

Considering static EnumStatusCode ValueHelper::getLocalizedText(const
ValueStruct*, LocalizedText&)/26 with 17 size
 to be inlined into static LocalizedText ValueHelper::getLocalizedText(const
ValueStruct*)/15 in (null):0

i.e. fprintf(NULL), which doesn't work in every libc.

  Rainer