This commit:
* Introduces `_` as a prefix for all non-user entities we emit in
decompiled code.
Also, some names have been changed to be more concise.
Specifically, the following entities have changed:
`_ENUM_UNDERLYING`, `_ABI`, `_REG`, `_padding_at_`,
`_artificial_struct_`, `_artificial_wrapper_`, `_stack`,
`_break_from_loop_`, `_var_`, `_stack_arguments`,
`_artificial_struct_returned_`, `_enum_max_value_`.
* Introduce _PACKED for `__attribute__((packed))`.
* `EnumEntry` name: drop the `EnumType` name prefix.
SegregateStackAccesses and PromoteStackPointer were not handling
functions declarated (but not defined) properly.
This commit fixes this, in part by adopting `TaggedFunctionPass`.
We need to prevent DCE from killing `revng_init_local_sp`, since certain
passes downstream might want to introduce new uses of it, and they might
be the first.
`SegregateStackAccesses` will take care of removing it by hand.
Change company name to "rev.ng Labs Srl" in all license headers
to reflect changed company name and legal status
Add missing license headers to files that didn't have one
* Adjust stack pointer upon returning from call.
In architecture where the return address is pushed on the stack, on
the caller side, we see the the push but not the pop. This means that,
once the stack pointer is no longer global, we need to take this into
account.
This commit fixes this increase the stack pointer of
`FinalStackOffset` right after a function call.
* Drop the size argument from the `revng_init_local_sp` function. We
will have a `revng_stack_frame` function to represent the actual stack
frame pointing to its beginning.
The PromoteStackPointerPass now trivially handles running on modules
where the global variable for the stack pointer is missing.
When the global is not found, the pass just does nothing and returns
false.
This is necessary to handle very small functions, typically from tests.
Alessandro Di Federico