[Bug target/78254] New: FAIL: g++.dg/torture/pr77822.C -O3 -g (internal compiler error)

["schwab at linux-m68k dot org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78254

            Bug ID: 78254
           Summary: FAIL: g++.dg/torture/pr77822.C   -O3 -g  (internal
                    compiler error)
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: schwab@linux-m68k.org
  Target Milestone: ---
            Target: m68k-*-*

Combine is generating

(insn 47 46 48 (set (cc0)
        (compare (zero_extract:SI (reg:SI 1 %d1 [orig:33 b.0_3 ] [33])
                (const_int 1 [0x1])
                (const_int -33 [0xffffffffffffffdf]))
            (const_int 0 [0])))
"../../../gcc/gcc/testsuite/g++.dg/torture/pr77822.C":27 31 {*m68k.md:763}
     (expr_list:REG_DEAD (reg:SI 1 %d1 [orig:33 b.0_3 ] [33])
        (nil)))

but output_btst cannot cope with out-of-range bit pos for a register operand.