v0.0.0-6078-ge6932ecc5

Fix dangling help message.

An ephemeral string in a flag help message ends up being assigned
to a string_view which holds the reference to that temporary.

Instead, keep the generated help message backed by storage, so that
it can be safely passed to a string_view.

#xls-build-gardener

PiperOrigin-RevId: 683838862

v0.0.0-6067-g6a0464959

Fix typo in butterfly topology documentation.

Change "-tree" to "-fly" when needed and change "-" to "\-" to correctly render the italics.

PiperOrigin-RevId: 683485795

v0.0.0-6045-gd0c9bbd4d

Make codegen implement shra as a function.

This allows us to bind the intermediate result `$signed(to_shift) >>> amount` to a reg with a defined width, which avoids the `$signed()` having a self-determined width, which is a lint finding.

Fixes google/xls#1642.

PiperOrigin-RevId: 682526771

v0.0.0-6034-g87567ce57

[xls] Ensure sitofp and friends work on tensors too

Accidental omission from previous patch.

PiperOrigin-RevId: 682190931

v0.0.0-6014-geeabb4445

Added minor additions to DSLX types, funcs, and ast nodes.

  - Additional casts for Types.
  - GetParamByName for Functions.
  - Overrideable default for AstNodeVisitorWithDefault.

PiperOrigin-RevId: 681662121

v0.0.0-6005-gebd1582c2

[xlscc] Don't const-prop so much during short circuiting.

PiperOrigin-RevId: 681159199

v0.0.0-5984-g5eed6363a

Make FifoConfig constexpr-constructible.

PiperOrigin-RevId: 679331734

v0.0.0-5969-ga29cae6f3

Make the default dslx stdlib path an `inline constexpr std::string_vi…

v0.0.0-5955-ge5bcb56fb

Tell clang-tidy explicitly to consider code c++20.

Even though the -std=c++20 makes it into the
compilation DB, clang-tidy does not pick it up.

So be explicit and add it to the --extra-args on
invocation.

Thie fixes all reported [clang-diagnostic-error] that
were due to clang-tidy not recognizing c++20 constructs
and also some misc-include-cleaner warnings in which it
previously flagged some includes because it was tripping
over some other problem in the file in question.

<    21 [misc-include-cleaner]
<    20 [clang-diagnostic-error]
---
>    15 [misc-include-cleaner]

PiperOrigin-RevId: 678427605

v0.0.0-5947-gc4c12c46e

Simplify clang-tidy and explicitly list all relevant rules.

Without using wild-card options, it is easier to switch between
clang-tidy versions without getting new, unexpected findings.

This selective approach also reports less than the previous
configuration which was mostly enabling everything, then only
disabling the rules that were not helpful. Now, we're just
enabling vetted helpful rules.

Output of `xls/dev_tools/run-clang-tidy-cached.sh` is
now a more manageable

```
--- Summary --- (details in xls_clang-tidy.out)
   35 [clang-diagnostic-unused-const-variable]
   22 [bugprone-argument-comment]
   21 [misc-include-cleaner]
   20 [clang-diagnostic-error]
   15 [modernize-make-unique]
   13 [performance-unnecessary-copy-initialization]
    9 [clang-diagnostic-unused-function]
    7 [google-default-arguments]
    6 [abseil-string-find-str-contains]
    5 [readability-inconsistent-declaration-parameter-name]
    4 [google-readability-function-size]
    4 [modernize-use-bool-literals]
    3 [bugprone-use-after-move]
    3 [modernize-use-equals-default]
    3 [readability-container-size-empty]
    2 [bugprone-dangling-handle]
    2 [clang-diagnostic-thread-safety-analysis]
    2 [performance-inefficient-vector-operation]
    1 [google-explicit-constructor]
```

PiperOrigin-RevId: 678029545