Re: [tree-ssa][unit-at-a-time] bootstrap

[<judd dot jenne at charter dot net>]

Andrew,

This testcase produces a similar error as the bootstrap.

It compiles on mainline.

gcc --version:

Reading specs from 
/home/judd/gcc-dev/bin-ssa/lib/gcc/i686-pc-linux-gnu/3.5-tree-ssa/specs
Configured with: /home/judd/gcc-dev/gcc-ssa/configure 
--prefix=/home/judd/gcc-dev/bin-ssa 
--enable-languages=c,c++ --disable-libgcj 
--enable-checking
Thread model: posix
gcc version 3.5-tree-ssa 20030823 (merged 20030817)

Compile Line:

gcc -O2 -funit-at-a-time -o testcase2 testcase2.c
/tmp/cckppReb.o(.text+0xf): In function `main':
: undefined reference to `last_real_code.0'
collect2: ld returned 1 exit status

static void
record_insn_name(int code)
{
    static int last_real_code = 0;

    last_real_code = code;
}

int
main(void)
{
    record_insn_name(4);

    return 0;
}

Here is the .01.rtl file:

;; Function main

(note 2 0 5 NOTE_INSN_DELETED)

(insn 5 2 6 (parallel [
            (set (reg/f:SI 7 esp)
                (and:SI (reg/f:SI 7 esp)
                    (const_int -16 [0xfffffff0])))
            (clobber (reg:CC 17 flags))
        ]) -1 (nil)
    (nil))

(insn 6 5 7 (set (reg:SI 59)
        (const_int 0 [0x0])) -1 (nil)
    (nil))

(insn 7 6 8 (parallel [
            (set (reg/f:SI 7 esp)
                (minus:SI (reg/f:SI 7 esp)
                    (reg:SI 59)))
            (clobber (reg:CC 17 flags))
        ]) -1 (nil)
    (nil))

(insn 8 7 3 (set (reg/f:SI 60)
        (reg/f:SI 55 virtual-stack-dynamic)) -1 (nil)
    (nil))

(note 3 8 4 NOTE_INSN_FUNCTION_BEG)

(note 4 3 10 NOTE_INSN_DELETED)

(note 10 4 11 0x4018fd40 NOTE_INSN_BLOCK_BEG)

(note 11 10 12 NOTE_INSN_DELETED)

(note 12 11 13 0x4018fe80 NOTE_INSN_BLOCK_BEG)

(note 13 12 15 NOTE_INSN_DELETED)

(insn 15 13 16 (set (mem/f:SI (symbol_ref:SI 
("last_real_code.0") [flags 0x2] <var_decl 0x4018e5b0 
last_real_code>) [2 last_real_code+0 S4 A32])
        (const_int 4 [0x4])) -1 (nil)
    (nil))

(note 16 15 18 0x4018fe80 NOTE_INSN_BLOCK_END)

(insn 18 16 19 (set (reg:SI 58 [ <result> ])
        (const_int 0 [0x0])) -1 (nil)
    (nil))

(jump_insn 19 18 20 (set (pc)
        (label_ref 24)) -1 (nil)
    (nil))

(barrier 20 19 21)

(note 21 20 22 0x4018fd40 NOTE_INSN_BLOCK_END)

(note 22 21 26 NOTE_INSN_FUNCTION_END)

(insn 26 22 27 (clobber (reg/i:SI 0 eax)) -1 (nil)
    (nil))

(insn 27 26 24 (clobber (reg:SI 58 [ <result> ])) -1 (nil)
    (nil))

(code_label 24 27 25 1 "" [0 uses])

(insn 25 24 28 (set (reg/i:SI 0 eax)
        (reg:SI 58 [ <result> ])) -1 (nil)
    (nil))

(insn 28 25 0 (use (reg/i:SI 0 eax)) -1 (nil)
    (nil))

Judd