[Bug rtl-optimization/61094] [4.9/4.10 Regression] -O3 insn Internal compiler error in copyprop_hardreg_forward_1, at regcprop.c:775

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61094

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hjl.tools at gmail dot com

--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
REE pass turns

(insn 8 6 9 2 (set (reg:SI 21 xmm0 [orig:94 p1 ] [94])
        (mem:SI (reg/f:DI 0 ax [orig:83 D.2426 ] [83]) [3 MEM[(const struct A
&)_4]+0 S4 A32])) 90 {*movsi_internal}
     (nil))
(insn 10 9 11 2 (set (reg:DI 2 cx [orig:102 D.2428 ] [102])
        (zero_extend:DI (reg:SI 21 xmm0 [orig:94 p1 ] [94]))) pr61094.cc:10 132
{*zero_extendsidi2}
     (nil))

into

(insn 8 6 64 2 (set (reg:DI 2 cx) 
        (zero_extend:DI (mem:SI (reg/f:DI 0 ax [orig:83 D.2426 ] [83]) [3
MEM[(const struct A &)_4]+0 S4 A32]))) 132 {*zero_extendsidi2}
     (nil))
(insn 64 8 9 2 (set (reg:DI 21 xmm0)
        (reg:DI 2 cx [orig:102 D.2428 ] [102])) -1
     (nil))

Unfortunately (set (reg:DI 21 xmm0) (reg:DI 2 cx)) is disabled for
-mtune=generic.