[Bug rtl-optimization/22472] [4.1 regression] testsuite failure gcc.c-torture/compile/930621-1.c -O3 -funroll-loops

["danglin at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From danglin at gcc dot gnu dot org  2005-07-13 23:56 -------
It might not be a regrename bug.  I see this at the end of the .ce pass:

;; Start of basic block 0, registers live: 2 [%r2] 22 [%r22] 26 [%r26] 28 [%r28]
 30 [%r30]
(note 9 2 145 0 [bb 0] NOTE_INSN_BASIC_BLOCK)

(note 145 9 7 0 NOTE_INSN_PROLOGUE_END)

(note 7 145 12 0 NOTE_INSN_FUNCTION_BEG)

(jump_insn 12 7 14 0 (set (pc)
        (if_then_else (eq (reg/v:SI 28 %r28 [orig:94 p ] [94])
                (const_int 0 [0x0]))
            (label_ref:SI 82)
            (pc))) 25 {*pa.md:1700} (insn_list:REG_DEP_ANTI 6 (nil))
    (expr_list:REG_BR_PROB (const_int 5000 [0x1388])
        (nil)))
;; End of basic block 0, registers live:
 2 [%r2] 22 [%r22] 26 [%r26] 28 [%r28] 30 [%r30]

;; Start of basic block 1, registers live: 22 [%r22] 26 [%r26] 28 [%r28] 30 [%r3
0]

...

(note 86 137 69 NOTE_INSN_LOOP_END)

(note 69 86 82 NOTE_INSN_FUNCTION_END)

;; Start of basic block 6, registers live: 2 [%r2] 30 [%r30]
(code_label 82 69 79 6 8 "" [1 uses])

(note 79 82 73 6 [bb 6] NOTE_INSN_BASIC_BLOCK)

(insn 73 79 78 6 (clobber (reg/i:SI 28 %r28)) -1 (nil)
    (nil))

(insn 78 73 147 6 (use (reg/i:SI 28 %r28)) -1 (insn_list:REG_DEP_TRUE 73 (nil))
    (nil))

(jump_insn 147 78 146 6 (parallel [
            (return)
            (use (reg:SI 2 %r2))
            (const_int 0 [0x0])
        ]) -1 (nil)
    (expr_list:REG_DEAD (reg:SI 2 %r2)
        (nil)))



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22472