[Bug middle-end/49721] convert_memory_address_addr_space may generate invalid new insns

[ubizjak at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49721

--- Comment #13 from Uros Bizjak <ubizjak at gmail dot com> 2011-08-02 19:32:46 
UTC ---
(In reply to comment #10)
> Here is the problem:

No, in your case new insn is rejected (twice):

Trying 434 -> 435:
Failed to match this instruction:
(parallel [
        (set (reg/f:SI 364)
            (if_then_else:SI (eq:SI (reg:SI 442)
                    (const_int 0 [0]))
                (const:SI (plus:SI (symbol_ref:SI ("iplane.1553") [flags 0x2] 
<var_decl 0x7f9a07ef33c0 iplane>)
                        (const_int -4 [0xfffffffffffffffc])))
                (const:SI (plus:SI (symbol_ref:SI ("iplane.1553") [flags 0x2] 
<var_decl 0x7f9a07ef33c0 iplane>)
                        (const_int 4 [0x4])))))
        (clobber (reg:CC 17 flags))
    ])
Failed to match this instruction:
(set (reg/f:SI 364)
    (if_then_else:SI (eq:SI (reg:SI 442)
            (const_int 0 [0]))
        (const:SI (plus:SI (symbol_ref:SI ("iplane.1553") [flags 0x2] 
<var_decl 0x7f9a07ef33c0 iplane>)
                (const_int -4 [0xfffffffffffffffc])))
        (const:SI (plus:SI (symbol_ref:SI ("iplane.1553") [flags 0x2] 
<var_decl 0x7f9a07ef33c0 iplane>)
                (const_int 4 [0x4])))))