Follow up on #139303

Seeing how we can't generate any debug intrinsics any more: delete a
variety of codepaths where they're handled. For the most part these are
plain deletions, in others I've tweaked comments to remain coherent, or
added a type to (what was) type-generic-lambdas.

This isn't all the DbgInfoIntrinsic call sites but it's most of the
simple scenarios.

Co-authored-by: Nikita Popov <github@npopov.com>

This flag was used to let us incrementally introduce debug records
into LLVM, however everything is now using records. It serves no
purpose now, so delete it.

(Base|Scaled)Reg may not dominate the chosen insert point, if there are
multiple uses of the address. Bail out if that's the case, otherwise we
will generate invalid IR.

In some cases, we could probably adjust the insert point or hoist the
(Base|Scaled)Reg.

Fixes https://github.com/llvm/llvm-project/issues/142830.

PR: https://github.com/llvm/llvm-project/pull/142949

The signed addition could overflow which is undefined behavior, now the
code checks for it.

#140254 was previously missing 2 files in the bazel build config.

This reverts commit d00d74bb2564103ae3cb5ac6b6ffecf7e1cc2238. 

The PR breaks our buildbots and blocks downstream merge.

add `GenericFloatingPointPredicateUtils` in order to generalize
effects of floating point comparisons on `KnownFPClass` for both IR and
MIR.

---------

Co-authored-by: Matt Arsenault <arsenm2@gmail.com>

Function optimizeBlock may do optimizations on a block for multiple
times. In the first iteration of the loop, MemoryInst1 may generate a
sunk instruction and store it into SunkAddrs. In the second iteration of
the loop, MemoryInst2 may use the same address and then it can reuse the
sunk instruction stored in SunkAddrs, but MemoryInst2 may be before
MemoryInst1 and the corresponding sunk instruction. In order to avoid
use before def error, we need to find appropriate insert position for the
 sunk instruction.

Fixes #138208.

Reapply "IR: Remove uselist for constantdata (#137313)"

This reverts commit 5936c02c8b9c6d1476f7830517781ce8b6e26e75.

Fix checking uselists of constants in assume bundle queries