Most of the times, when we need to get the next instruction, we actually
want to skip over "marker" function calls (e.g., calls to `newpc` and
`function_call`). `nextNonMarker` does exactly this.
`FunctionCallIdentification::isCall` and `JumpTargetManager::setCFGForm`
have also been extended to correctly handle such situations.
This commit introduces two new passes:
* `GeneratedCodeBasicInfo`: recovers from the IR some basic information
like the size of delay slots in the input architecture, the name of
the program counter and so on. It can also identify the type of a
basic block (e.g., dispatcher, jump target...). *
* `FunctionCallIdentification`: identifies function calls and injects a
marker before the associated terminator instruction.
The idea of these two passes is to try to progressively move information
we used to keep in `JumpTargetManager` into the IR, so that it is more
easily accessible and passes do not need a reference to `JTM`.
In particular by having markers for function calls available during jump
target discovery we don't have to have duplicated and suboptimal
implementation of `isCall`.
This commit also introduce some additional helper functions and an
helper class to quickly.
Alessandro Di Federico