[Bug target/42448] New: Wrong code with _Complex char in structure

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

Following testcase:

--cut here--
struct S2180
{
  char t;
  _Complex char u[2];
};

struct S2180 s2180;

int
main (void)
{
  volatile struct S2180 x;

  s2180.u[1] = 3 + 4i;

  x.u[1] = s2180.u[1];

  if (x.u[1] != s2180.u[1])
    abort ();

  return 0;
}
--cut here--

aborts for all optimization levels.

This bug shows in the testsuite of 4.4 branch [1]:

Running target unix
FAIL: tmpdir-gcc.dg-struct-layout-1/t024 c_compat_x_tst.o-c_compat_y_tst.o
execute 
FAIL: tmpdir-gcc.dg-struct-layout-1/t027 c_compat_x_tst.o-c_compat_y_tst.o
execute 

The bug is also present on 4.3 and 4.5.

[1] http://gcc.gnu.org/ml/gcc-testresults/2009-12/msg01241.html


-- 
           Summary: Wrong code with _Complex char in structure
           Product: gcc
           Version: 4.4.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ubizjak at gmail dot com
 GCC build triplet: alpha-linux-gnu
  GCC host triplet: alpha-linux-gnu
GCC target triplet: alpha-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42448