[Bug target/64793] New: [SH] missed delay slot

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64793

            Bug ID: 64793
           Summary: [SH] missed delay slot
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: olegendo at gcc dot gnu.org
            Target: sh*-*-*

The following test case

int test0 (const char* x, int a, int b, int c)
{
  if (x[a] == 92)
    return b;
  return c;
}

compiled with -O2 -m4 results in:

        mov     r5,r0
        mov.b   @(r0,r4),r1
        mov     r1,r0
        cmp/eq  #92,r0
        bt      .L3
        mov     r7,r0     <<< this insn
        rts
        nop               <<< should go into the delay slot
.L3:
        rts
        mov     r6,r0