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Re: Miscellaneous testsuitsuite failures under hpux 10.20
- To: dave at hiauly1 dot hia dot nrc dot ca (John David Anglin)
- 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 12:36:46 -0400 (EDT)
- Cc: gcc-bugs at gcc dot gnu dot org
> 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/920501-6.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?
Dave
--
J. David Anglin dave.anglin@nrc.ca
National Research Council of Canada (613) 990-0752 (FAX: 952-6605)