The operands of the anchor cannot be null.

ir_sc_parameter is for addresses of parameters, parameters themselfes
may point to anything.
This fixes firm-testsuite/opt/fehler110.c + fehler271.c

Duplicate Projs are a problem when CSE is off, e.g. -O0.

Duplicate Projs are a problem when CSE is off, e.g. -O0.

The name is misleading (only the size is replicated, not the contents).
Further, they were only used by the corresponding DUP_ARR_*().

mode_b is a data mode.

So far, we create care information with the wrong mode.
Thus, the care_for function conservatively mark all bits as relevant.

Before, the transfer function for Shrs was wrong for unsigned modes.

This fixes x86code/loadafterload.c.

This fixed opt/fehler274.c.