Replace it with a forward declaration instead. Analysis.h is pulled in
by all passes, but not all passes need to access the module.

This change removes the `tidyLandingPads` function, which previously
had a few responsibilities:

1. Dealing with the deletion of an invoke, after MachineFunction lowering.
2. Dealing with the deletion of a landing pad BB, after MachineFunction lowering.
3. Cleaning up the type-id list generated by `MachineFunction::addLandingPad`.

Case 3 has been fixed in the generator, and the others are now handled
during table emission.

This change also removes `MachineFunction`'s `addCatchTypeInfo`,
`addFilterTypeInfo`, and `addCleanup` helper fns, as they had a single
caller, and being outlined didn't make it simpler.

Finally, as calling `tidyLandingPads` was effectively the only thing
`DwarfCFIExceptionBase` did, that class has been eliminated.

Differential Revision: https://reviews.llvm.org/D138674

The existing behaviors and callbacks were overlapping and had very
confusing semantics: beginBasicBlock/endBasicBlock were not always
called, beginFragment/endFragment seemed like they were meant to mean
the same thing, but were slightly different, etc. This resulted in
confusing semantics, virtual method overloads, and control flow.

Remove the above, and replace with new beginBasicBlockSection and
endBasicBlockSection callbacks. And document them.

These are always called before the first and after the last blocks in
a function, even when basic-block-sections are disabled.

Add SwitchSection to return switchSection. The API will be removed soon.

Summary:
When -ffunction-sections is on, this patch makes the compiler to generate unique LSDA and EH info sections for functions on AIX by appending the function name to the section name as a suffix. This will allow the AIX linker to garbage-collect unused function.

Reviewed by: MaskRay, hubert.reinterpretcast

Differential Revision: https://reviews.llvm.org/D124855

The pointer is used immediately inside the getSymbol() call, so assert the cast is correct instead of returning nullptr

Discourse thread: https://discourse.llvm.org/t/include-what-you-use-include-cleanup
Differential Revision: https://reviews.llvm.org/D121332

During fast-isel calling 'markFunctionEnd' in the base class will call
tidyLandingPads. This can cause an issue where we have determined that
we need ehinfo and emitted a traceback table with the bits set to
indicate that we will be emitting the ehinfo, but the tidying deletes
all landing pads. In this case we end up emitting a reference to
__ehinfo.N symbol, but not emitting a definition to said symbol and the
resulting file fails to assemble.

Differential Revision: https://reviews.llvm.org/D117040

Summary:

generate eh_info when vector registers are saved according to the traceback table.

struct eh_info_t {

unsigned version;       /* EH info version 0 */
#if defined(64BIT)

char _pad[4];           /* padding */
#endif

unsigned long lsda;     /* Pointer to Language Specific Data Area */
unsigned long personality; /* Pointer to the personality routine */
};

the value of lsda and personality is zero when the number of vector registers saved is large zero and there is not personality of the function

Reviewers: Jason Liu
Differential Revision: https://reviews.llvm.org/D103651