[Bug debug/55730] [4.8 Regression] ICE in mem_loc_descriptor, at dwarf2out.c:12725

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55730

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> 2012-12-18 14:51:11 UTC ---
Reduced with a cross from x86_64 configured with --target=powerpc64-suse-linux
--with-cpu-64=power4 --enable-secureplt --with-long-double-128
--enable-languages=c,c++


typedef int GLint;
typedef unsigned char GLubyte;
typedef unsigned short GLushort;
typedef float GLfloat;
typedef union {
    GLfloat f;
    GLint i;
} fi_type;
void pack_float_GR88 (void *dst)
{
  GLushort *d = ((GLushort *) dst);
  GLubyte r, g;
  fi_type __tmp;
  if (__tmp.i < 0) 
    g = (GLubyte) 0;
  else 
    {
      __tmp.f = __tmp.f * (255.0F/256.0F) + 32768.0F;
      g = (GLubyte) __tmp.i;
    }
  *d = (((g) << 8) | (r));
}

> ./cc1 -fpreprocessed format_pack.3.i -msecure-plt -quiet -mcpu=power4 -g -O2
(clobber:QI (const_int 0 [0]))format_pack.3.i: In function 'pack_float_GR88':
format_pack.3.i:22:1: internal compiler error: in mem_loc_descriptor, at
dwarf2out.c:12729
 }
 ^
0x76b280 mem_loc_descriptor(rtx_def*, machine_mode, machine_mode,
var_init_status)
        /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:12729
0x76c090 loc_descriptor
        /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:13068
0x76b85a loc_descriptor
        /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:12894
0x76c4c4 dw_loc_list_1
        /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:13167
0x76cc5c dw_loc_list
        /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:13423
0x76dab1 loc_list_from_tree
        /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:13808
0x771ea7 add_location_or_const_value_attribute
        /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:15302
0x77a85b gen_variable_die
        /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:18415
0x77fbce gen_decl_die
        /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:20051
0x77e3aa process_scope_var
        /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:19595
0x77e416 decls_for_scope
        /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:19617
0x779393 gen_subprogram_die
        /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:18004
0x77f84d gen_decl_die
        /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:19984
0x780836 dwarf2out_decl(tree_node*)
        /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:20366
0x780870 dwarf2out_function_decl
        /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:20374
0x7e6ccc rest_of_handle_final
        /space/rguenther/src/svn/trunk/gcc/final.c:4302
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