FAIL: gcc.c-torture/execute/950628-1.c execution, -O1

[John David Anglin]

> On Wed, Jan 24, 2001 at 02:06:21PM -0500, John David Anglin wrote:
> > Is a similar patch needed in mark_set_1?
> 
> No, we're not inventing fake stores there.

Then, I expect that only the original problem is fixed.  I just checked
and the problem with with long doubles isn't fixed (regstack-1 et al).
I will bet that this is also related to unchanging memory.  Here is some rtl
from the cfg pass for regstack-1 using -O3:

(insn 34 50 36 (set (mem/u/f:SI (plus:SI (reg/f:SI 3 %r3)
                (const_int 24 [0x18])) 4)
        (subreg:SI (reg:TF 101) 0)) 69 {*pa.md:2099} (nil)
    (insn_list:REG_LIBCALL 65 (nil)))

(insn 36 34 38 (set (mem/u/f:SI (plus:SI (reg/f:SI 3 %r3)
                (const_int 28 [0x1c])) 4)
        (subreg:SI (reg:TF 101) 1)) 69 {*pa.md:2099} (nil)
    (nil))

(insn 38 36 40 (set (mem/u/f:SI (plus:SI (reg/f:SI 3 %r3)
                (const_int 32 [0x20])) 4)
        (subreg:SI (reg:TF 101) 2)) 69 {*pa.md:2099} (nil)
    (nil))

(insn 40 38 43 (set (mem/u/f:SI (plus:SI (reg/f:SI 3 %r3)
                (const_int 36 [0x24])) 4)
        (subreg:SI (reg:TF 101) 3)) 69 {*pa.md:2099} (nil)
    (nil))

(insn 43 40 45 (set (mem/u/f:SI (plus:SI (reg/f:SI 3 %r3)
                (const_int 40 [0x28])) 4)
        (subreg:SI (reg:TF 102) 0)) 69 {*pa.md:2099} (nil)
    (nil))

(insn 45 43 47 (set (mem/u/f:SI (plus:SI (reg/f:SI 3 %r3)
                (const_int 44 [0x2c])) 4)
        (subreg:SI (reg:TF 102) 1)) 69 {*pa.md:2099} (nil)
    (nil))

(insn 47 45 49 (set (mem/u/f:SI (plus:SI (reg/f:SI 3 %r3)
                (const_int 48 [0x30])) 4)
        (subreg:SI (reg:TF 102) 2)) 69 {*pa.md:2099} (nil)
    (nil))

(insn 49 47 52 (set (mem/u/f:SI (plus:SI (reg/f:SI 3 %r3)
                (const_int 52 [0x34])) 4)
        (subreg:SI (reg:TF 102) 3)) 69 {*pa.md:2099} (nil)
    (nil))

These insn are gone after the life pass.

Dave
-- 
J. David Anglin                                  dave.anglin@nrc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6605)