[Bug rtl-optimization/55247] [4.8 Regression] internal compiler error: Max. number of generated reload insns per insn is achieved (90)

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55247

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |UNCONFIRMED
          Component|middle-end                  |rtl-optimization
         Depends on|                            |55259
     Ever Confirmed|1                           |0

--- Comment #12 from H.J. Lu <hjl.tools at gmail dot com> 2012-11-10 19:02:04 UTC ---
(In reply to comment #11)
> ~/gcc-build/gcc/cc1 -O2 -mx32 -maddress-mode=long pr55247.c
> 
> results in following sequence:
> 
>         movdqu  (%eax), %xmm0
>         movdqa  %xmm0, (%rsp)
>         movq    (%rsp), %rax
>         movq    8(%rsp), %rdx
>         movq    %rax, 16(%rsp)
>         movq    %rdx, 24(%rsp)
> 
> while -maddress=mode=short produces expected code:
> 
>         movq    8(%eax), %rdx
>         movq    (%eax), %rax
>         movq    %rdx, 8(%esp)
>         movq    %rax, (%esp)

This is related to PR 55259.  This patch:

http://gcc.gnu.org/ml/gcc-patches/2012-11/msg00799.html

fixes it.