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Re: Miscellaneous testsuitsuite failures under hpux 10.20
- To: law at cygnus dot com
- Subject: Re: Miscellaneous testsuitsuite failures under hpux 10.20
- From: "John David Anglin" <dave at hiauly1 dot hia dot nrc dot ca>
- Date: Wed, 21 Jun 2000 18:39:34 -0400 (EDT)
- Cc: gcc-bugs at gcc dot gnu dot org
>
>
> In message <200006211636.MAA05809@hiauly1.hia.nrc.ca>you write:
> > > 2) Fatal signal 11
> > >
> > > gcc/ /xxx/gnu/gcc-2.96/gcc/testsuite/gcc.c-torture/execute/920501-6.c -w
> > -O3 -fssa -lm -threads -o /xxx/gnu/gcc-2.96/objdir/gcc/testsuite/9205
> > 01-6.x7 (timeout = 300)
> > > xgcc: Internal compiler error: program cc1 got fatal signal 11^M
> > > compiler exited with status 1
> > > output is:
> > > xgcc: Internal compiler error: program cc1 got fatal signal 11^M
> >
> > The problem is a null pointer returned at line 1230 of loop.c
> > (libcall_other_reg). The rtl from the gcse stage that causes the
> > problem is:
> >
> > (insn/i 107 106 108 (set (reg:DI 153)
> > (reg:DI 153)) 122 {movstrsi_internal+10} (nil)
> > (insn_list:REG_RETVAL 104 (expr_list:REG_EQUAL (lshiftrt:DI (reg:DI 122
> > )
> > (const_int 1 [0x1]))
> > (nil))))
> >
> > The resulting value for note is:
> >
> > (gdb) p debug_rtx(note)
> >
> > (insn_list:REG_RETVAL 104 (expr_list:REG_EQUAL (lshiftrt:DI (reg:DI 122)
> > (const_int 1 [0x1]))
> > (nil)))
> >
> > and the initial value of p is:
> >
> > (gdb) p debug_rtx(p)
> > (insn/v/i 104 0 0 (clobber (reg:DI 153)) -1 (nil)
> > (expr_list:REG_UNUSED (reg:DI 153)
> > (insn_list:REG_LIBCALL 107 (nil))))
> >
> > As can be seen, the next instruction is 0 rather than 107. Thus, either
> > find_reg_note needs to be fixed to handle this situation differently,
> > or libcall_other_reg must be prepared for a null pointer. Thoughts?
> This shows that insn 104 was deleted. That's incorrect behavior. Find out
> where insn 104 was deleted.
The insn 104 was deleted in the ussa pass.
--
J. David Anglin dave.anglin@nrc.ca
National Research Council of Canada (613) 990-0752 (FAX: 952-6605)