Miscellaneous testsuitsuite failures under hpux 10.20

[John David Anglin]

> 
> 
>   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)