unreachable branch in codegen for switch statement

[Venkatachalam, Vasanth]

Doug or others-

When I ran the test case below through the AMD64 backend, I noticed an unreachable branch in the code generated below.  Namely, the jmp instruction at 0x00007facc8145a60.  It appears this is coming from the call to emitJump( ) in LIRGenerator.doBlock( ), which appends a jump instruction to the end of each basic block, which may later get optimized away by the reg. allocator.  Is there a reason why this jmp isn't being optimized away? Is there any way around this?
I tried -G:+RemoveNeverExecutedCode but this isn't making a difference.

I'm hitting the same issue when I generate HSAIL code for this switch statement, but I get an assembler error due to this unreachable branch.

public int switchTest(int n) {
        switch (n) {
            case 0:
                return 0;
            case 1:
                return 1;
            case 2:
                return 2;
            default:
                return 3;
        }
}

0x00007facc8145a40: cmp    edx,0x0
  0x00007facc8145a43: je     0x00007facc8145a6b
  0x00007facc8145a49: cmp    edx,0x1
  0x00007facc8145a4c: je     0x00007facc8145a72
  0x00007facc8145a52: cmp    edx,0x2
  0x00007facc8145a55: je     0x00007facc8145a79
  0x00007facc8145a5b: jmp    0x00007facc8145a65
  0x00007facc8145a60: jmp    0x00007facc8145a6b //unreachable code
  0x00007facc8145a65: mov    eax,0x3
  0x00007facc8145a6a: ret
  0x00007facc8145a6b: mov    eax,0x0            //case 0
  0x00007facc8145a70: jmp    0x00007facc8145a6a
  0x00007facc8145a72: mov    eax,0x1            //case 1
  0x00007facc8145a77: jmp    0x00007facc8145a6a
  0x00007facc8145a79: mov    eax,0x2            //case 2
  0x00007facc8145a7e: jmp    0x00007facc8145a6a