[Bug target/64011] New: Fail to compile pr48335-2.c on big-endian aarch64

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64011

            Bug ID: 64011
           Summary: Fail to compile pr48335-2.c on  big-endian aarch64
           Product: gcc
           Version: 4.9.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: chenshanyaoboy at gmail dot com

example from pr48335-2.c
cat test.c

typedef short U __attribute__((may_alias, aligned (1)));

struct S
{
  _Complex float d __attribute__((aligned (8)));
};

void bar(struct S);

void f5 (int x)
{
  struct S s = { .d = 0.0f };
  ((U *)((char *) &s.d + 1))[3] = x;
  __real__ s.d *= 7.0;
  bar (s);
}

aarch64-linux-gnu-gcc -w -c -O1 test.c -mbig-endian
/tmp/cc9vId7S.s: Assembler messages:
/tmp/cc9vId7S.s:12: Error: immediate value out of range 0 to 31 at operand 3 --
`bfi w1,w0,-8,16'