[Bug target/55672] [4.8 Regression] -fstack-check=generic ICEs in print_reg, at config/i386/i386.c:13868

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55672



Jakub Jelinek <jakub at gcc dot gnu.org> changed:



           What    |Removed                     |Added

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                 CC|                            |jakub at gcc dot gnu.org



--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-12-17 
10:51:45 UTC ---

Indeed, with LRA forced off reload replaces the 

(insn 6 3 7 2 (set (reg:CCZ 17 flags)

        (compare:CCZ (mem/c:SI (plus:SI (reg/f:SI 20 frame)

                    (const_int -32 [0xffffffffffffffe0])) [2 x+0 S4 A32])

            (const_int 4 [0x4]))) pr55672.c:4 7 {*cmpsi_1}

     (nil))

insn (only reference to frame register) with

(insn 6 3 7 2 (set (reg:CCZ 17 flags)

        (compare:CCZ (mem/c:SI (reg/f:SI 7 sp) [2 x+0 S4 A32])

            (const_int 4 [0x4]))) pr55672.c:4 7 {*cmpsi_1}

     (nil))

while LRA doesn't eliminate it.