An Ada program can have types that are subranges of other types. This
patch adds a new DIType node, DISubrangeType, to represent this concept.
    
I considered extending the existing DISubrange to do this, but as
DISubrange does not derive from DIType, that approach seemed more
disruptive.
    
A DISubrangeType can be used both as an ordinary type, but also as the
type of an array index. This is also important for Ada.

Ada subrange types can also be stored using a bias. Representing this in
the DWARF required the use of an extension. GCC has been emitting this
extension for years, so I've reused it here.

This avoids another unserializable field. Move the DbgInfoAvailable
field into the AsmPrinter, which is only really a cache/convenience
bit for checking a direct IR module metadata check.

I assume getSubprogram will do the correct thing in hasDebugInfo,
and this is redundant with the debug_compile_units distance check.
This is in preparation for removing the field.

Currently, an AsmPrinterHandler has several methods that allow to
dynamically hook in unwind or debug info emission, e.g. at begin/end of
every function or instruction. The class hierarchy and the actually
overridden functions are as follows:

    (SymSz=setSymbolSize, mFE=markFunctionEnd, BBS=BasicBlockSection,
     FL=Funclet; b=beginX, e=endX)
                          SymSz   Mod Fn  mFE BBS FL  Inst
    AsmPrinterHandler     -       -   -   -   -   -   -
    ` PseudoProbeHandler  -       -   -   -   -   -   -
    ` WinCFGuard          -       e   e   -   -   -   -
    ` EHStreamer          -       -   -   -   -   -   -
      ` DwarfCFIException -       e   be  -   be  -   -
      ` ARMException      -       -   be  e   -   -   -
      ` AIXException      -       -   e   -   -   -   -
      ` WinException      -       e   be  e   -   be  -
      ` WasmException     -       e   be  -   -   -   -
    ` DebugHandlerBase    -       b   be  -   be  -   be
      ` BTFDebug          -       e   -   -   -   -   b
      ` CodeViewDebug     -       be  -   -   -   -   b
      ` DWARFDebug        yes     be  -   -   -   -   b

Doing virtual function calls per instruction is costly and useless when
the called function does nothing.

This commit performs the following clean-up/improvements:

- PseudoProbeHandler is no longer an AsmPrinterHandler -- it used
nothing of its functionality to hook in at the possible points. This
avoids virtual function calls when a pseudo probe printer is present.

- DebugHandlerBase is no longer an AsmPrinterHandler, but a separate
base class. DebugHandlerBase is the only remaining "hook" for begin/end
instruction and setSymbolSize (only used by DWARFDebug). begin/end for
function and basic block sections are never overriden and therefore are
no longer virtual. (Originally I intended there to be only one debug
handler, but BPF as the only target supports two at the same time: DWARF
and BTF.)

- AsmPrinterHandler no longer has begin/end instruction and
setSymbolSize hooks -- these were only used by DebugHandlerBase. This
avoid iterating over handlers in every instruction.

    AsmPrinterHandler     Mod Fn  mFE BBS FL
    ` WinCFGuard          e   e   -   -   -
    ` EHStreamer          -   -   -   -   -
      ` DwarfCFIException e   be  -   be  -
      ` ARMException      -   be  e   -   -
      ` AIXException      -   e   -   -   -
      ` WinException      e   be  e   -   be
      ` WasmException     e   be  -   -   -

                          SymSz   Mod Fn  BBS Inst
    DebugHandlerBase      -       b   be  be  be
    ` BTFDebug            -       e           b
    ` CodeViewDebug       -       be          b
    ` DWARFDebug          yes     be          b

    PseudoProbeHandler (no shared methods)

To continue allowing external users (e.g., Julia) to hook in at every
instruction, a new method addDebugHandler is exposed.

This results in a performance improvement, especially in the -O0 -g0
case with unwind information (e.g., JIT baseline).

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

Part 1 of fix for issue
https://github.com/llvm/llvm-project/issues/54624

Split from PR #87623. Clang front end changes to follow.

Use DICompositeType to represent the template alias, using its extraData
field as a tuple of DITemplateParameter to describe the template
parameters.

Added template-alias.ll  - Check DWARF emission.
Modified  frame-types.s  - Check llvm-symbolizer understands the DIE.

… types." (#82285)

This reverts commit d9f9775ac6289271d57671c55166fa0cad61075b.

The test was missing a `REQUIRES: object-emission`.

These changes break the `LLVM::fixed-point.ll` test some targets what
fails the builds for those targets
(more details
https://github.com/llvm/llvm-project/pull/80757#issuecomment-1949382211)

The problem wasn't fixed for few days,

Reverts llvm/llvm-project#80757

This fixes https://github.com/llvm/llvm-project/issues/81555