freedreno/ir3/cp: fix ldib bug

Something that we didn't hit earlier because of the extra shr.b

Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Kristian H. Kristensen <hoegsberg@chromium.org>

src/freedreno/ir3/ir3_cp.c

@@ -210,6 +210,12 @@ static bool valid_flags(struct ir3_instruction *instr, unsigned n,
 
 			if (is_atomic(instr->opc) && !(instr->flags & IR3_INSTR_G))
 				return false;
+
+			/* as with atomics, ldib on a6xx can only have immediate for
+			 * SSBO slot argument
+			 */
+			if ((instr->opc == OPC_LDIB) && (n != 0))
+				return false;
 		}
 
 		break;