This reverts commit 7efc2374.

The function was used by the compiler lab reference compiler.

This reverts commit fb45ad91.

Otherwise, we may create a Phi without operands and later
add a Bad input to the Block.

irnodemap: Assert that the index is less than the length in ir_nodemap_insert_fast() and ir_nodemap_get_fast().

When there is a must_be_different constraint, it must be handled.
The mode of the value should not influence this.
This was some very old code.

See 364d7fce for details.

This should hold now that no more empty spill infos are generated for Phi arguments.

In non-debug builds the simulator now only runs when it was requested, instead of running with an uninitialized state.

This removes the last attributes from struct arch_env_t.

be: Move the info about the register classes and registers struct the arch_env_t into struct arch_isa_if_t.

Just use the selected isa interface directly.

In particular this unbreaks dumping boolean bitinfo.

Do this by always running the x87 simulator in debug builds and asserting on push to the simulated x87 stack that the request flag is set.

This corrects a problem in SPEC2006 445.gobmk.