[Bug target/35616] [4.1/4.2/4.3/4.4 Regression] Incorrect code while O2 compling

[ubizjak at gmail dot com]

------- Comment #11 from ubizjak at gmail dot com  2008-03-18 15:01 -------
cse1 pass somehow figures out that:

(insn 11 10 12 2 function.c:5 (set (reg/f:SI 61)
        (mem/s/f/c:SI (plus:SI (reg/f:SI 16 argp)
                (const_int 4 [0x4])) [4 data.listener+0 S4 A32])) 41 {*movsi_1} 
(nil))

(call_insn/j 12 11 0 2 function.c:5 (call (mem:QI (reg/f:SI 61) [0 S1 A8])
        (const_int 12 [0xc])) 423 {*sibcall_1} (nil)
    (nil))

can be substituted with:

(insn 11 10 12 2 function.c:5 (set (reg/f:SI 61 [ data.listener ])
        (reg:SI 59 [ data.c ])) 41 {*movsi_1} (nil))

(call_insn/j 12 11 0 2 function.c:5 (call (mem:QI (reg:SI 59 [ data.c ]) [0 S1
A
8])
        (const_int 12 [0xc])) 423 {*sibcall_1} (nil)
    (nil))


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35616