Moves the handful of functions from mangle.c used by drdecode (things that are difficult to untangle from the IR functions) into ir_utils.c Renames the top-level ir_utils.c to ir_utils_shared.c. Adds ir_utils.h.
Issue: #1684
Moves the handful of functions from mangle.c used by drdecode (things that are difficult to untangle from the IR functions) into ir_utils.c Renames the top-level ir_utils.c to ir_utils_shared.c. Adds ir_utils.h.
Issue: #1684