[Bug c++/27129] New: [4.1/4.2 Regression] ICE in get_expr_operands

["jakub at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

static const float a = 0.299f;
static const float b = 0.114f;
static const float c = 1 - a - c;

float
foo (void)
{
  return a + b + c;
}

ICEs at -O and higher.  There is a typo (should have been 1 - a - b of course),
but IMHO that just triggers undefined behavior.
G++ 4.0.x would initialize c in __static_initialization_and_destruction_0(int,
int) and compile it without ICE, where foo would be return 0.413f + c;
In 4.1.0+, apparently c is initialized to error_mark_node, although no error
nor even a warning is emitted at compile time, and obviously various later
optimizers are upset when seeing error_mark_node on unexpected places,
errorneous
input is not supposed to reach that far ever.


-- 
           Summary: [4.1/4.2 Regression] ICE in get_expr_operands
           Product: gcc
           Version: 4.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jakub at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27129