This fixes C/gnu99/combo_load_mode.c, C/gnu99/computed_goto.c, C/gnu99/ijmp.c, C/gnu99/vlabel2.c and C/gnu99/vlabel3.c.

This fixes C/gnu99/combo_load_mode.c, C/gnu99/computed_goto.c, C/gnu99/ijmp.c, C/gnu99/vlabel2.c and C/gnu99/vlabel3.c.

The verifier checks this already.

When compound types are passed as pointer, then not only the mode, but also the type, needs to be adjusted to a pointer.

They are passed as a pointer, not the value itself, so an extra load is needed.

This was broken when rewriting stack frame handling. (b6787e36)
Though the below test case did not work before either, because the correct code path was not entered due to inspecting the wrong type.
The latter was accidentally corrected while getting rid of higher types. (ae42d217)
This fixes gcc/va-arg-12.c.

Unused attributes may be uninitialized.

The negation accidentally got lost when using be_mode_needs_gp_reg().

When the Add was marked as non-adress-mode node it tried to recursively transform the Add again.
Just use 'x86_create_am_force' as it is done in the ia32 backend in the same situation.

The verifier would have complained earlier, if an Address node does not have reference mode.

Mostly remove redundant prefixes, which are (similarily) printed automatically.

A higher type was set in a few places, but not used otherwise.

This avoids the detour over [gs]et_higher_type().

This fixex C/gnu99/packed2.c and opt/compilerhang3.c.

Such a memcpy call results in undefined behavior.

* Omit the offset when it is 0.
* Show the offset in signed decimal.

This fixes the verifier failure of opt/compilerhang3.c.

This accidently turns opt/compilerhang3.c from an execute failure back into a compile failure by not creating a volatile CopyB anymore.

Return nodes can now access the frame type to decide whether
a constructed CopyB node should be volatile.

This fixes opt/fehler070.c on ARM.

They just use a 12 bit offset, not an immediate shifter operand.
This fixes the regression in ack/str.c.