Since we have no complicated barrier/prolog stuff in the transform phase
anymore we can move away from beabihelper now and create the nodes
directly which will be necessary when modeling special constraints like
wide aligned registers.

So sparc can handle this case now.

Use a special kind of entity on the frame type instead of a value_type
struct inside a method type. This makes replacement of function types
slightly easier (it's still a complex operation though) and handling in
the backend a bit more consistent since it's more or less a normal stack
access (with special offsets).

This was done by removing unnecessary options/options that only
allowed marginal tweakings to improve performance while at the same time
making the interface cumbersome.

Its emitter handles this.

Simplify usage of LC_OPT_ENT_STR(): The length of the buffer is determined in the macro, not passed as parameter.

This should fix 403.gcc.
A SBB with AM could not fulfill its should_be_same contraint, so the AM gets split from the SBB.
The Load of the AM gets assigned the out register of the SBB, which violates the !in_r5 constraint of the SBB.
Therefore it's necessary to turn the SBB into NOT+ADC.

Correct inaccurate comment: The only corner case of wrong CF in NEG+ADD as replacement for SUB is if both operands are zero.

This fixes opt/fehler194.c.

This also fixes 176.gcc and 300.twolf.