[Bug target/57896] [4.8 Regression] ICE in expand_expr_real_2

["ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57896

--- Comment #11 from UroÅ Bizjak <ubizjak at gmail dot com> ---
(In reply to UroÅ Bizjak from comment #10)
> (In reply to Vittorio Zecca from comment #5)
> 
> > Adding option -m32 I get ICE in ix86_expand_prologue, at
> > config/i386/i386.c:10559
> 
> I can confirm this with:
> 
> gcc version 4.8.3 20140219 (prerelease) [gcc-4_8-branch revision 207910]
> (GCC)
> 
> ~/gcc-build-48/gcc/cc1 -m32 -march=x86-64 pr57896.c

This is the same problem, as confirmed by following debug patch:

--cut here--
Index: i386.c
===================================================================
--- i386.c      (revision 207912)
+++ i386.c      (working copy)
@@ -10449,8 +10449,12 @@ ix86_expand_prologue (void)
   else if (!ix86_target_stack_probe ()
           || frame.stack_pointer_offset < CHECK_STACK_LIMIT)
     {
+      rtx x = GEN_INT (-allocate);
+
+      printf ("\nTestP1 %li\n", -allocate);
+      debug_rtx (x);
       pro_epilogue_adjust_stack (stack_pointer_rtx, stack_pointer_rtx,
-                                GEN_INT (-allocate), -1,
+                                x, -1,
                                 m->fs.cfa_reg == stack_pointer_rtx);
     }
   else
@@ -10536,6 +10540,7 @@ ix86_expand_prologue (void)
                          gen_frame_mem (word_mode, t));
        }
     }
+  printf ("\nTestP2 %li %li\n", m->fs.sp_offset, frame.stack_pointer_offset);
   gcc_assert (m->fs.sp_offset == frame.stack_pointer_offset);

   /* If we havn't already set up the frame pointer, do so now.  */
--cut here--

GEN_INT (...) produces some non-sensical RTX, and INTVAL at the end of
pro_epilogue_adjust_stack chokes on it.

      m->fs.sp_offset = ooffset - INTVAL (offset);
      m->fs.sp_valid = valid;

~/gcc-build-48/gcc/cc1 -m32 -march=x86-64 pr57896.c

...

TestP1 -56
(??? bad code 42752
)

TestP2 -139787679344504 64

pr57896.c: In function â__get_cpuid_maxâ:
pr57896.c:4:1: internal compiler error: in ix86_expand_prologue, at
config/i386/i386.c:10544
 }
 ^
0x98fe35 ix86_expand_prologue()
        /home/uros/gcc-svn/branches/gcc-4_8-branch/gcc/config/i386/i386.c:10544
0xa1ce9a gen_prologue()
       
/home/uros/gcc-svn/branches/gcc-4_8-branch/gcc/config/i386/i386.md:11829
0x673927 thread_prologue_and_epilogue_insns
        /home/uros/gcc-svn/branches/gcc-4_8-branch/gcc/function.c:5949
0x673927 rest_of_handle_thread_prologue_and_epilogue
        /home/uros/gcc-svn/branches/gcc-4_8-branch/gcc/function.c:6973