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[RISCV] Add regalloc hints for QC_EXTU (#173953)

`ANDI` with a mask gets converted into `QC_EXTU` in certain cases. Add
regalloc hints to use the same source and destination register so that
we can generate the compressed `QC_C_EXTU` instruction.

   doc/TODO: -ruby34-3.4.8

   - ruby34-3.4.8.

   doc: Updated lang/ruby34 to 3.4.8

   lang/ruby34: update to 3.4.8

   Ruby 3.4.8 (2025-12-16)

   * Bug #21629: Ruby-3.4.7 prints -Wdefault-const-init-field-unsafe warnings
     on clang / llvm 21
   * Bug #21626: Backport WASI setjmp handler memory leak fixes
   * Bug #21631: Backport openssl gem bugfix releases
   * Bug #21632: Backport REXML CVE-2025-58767 fix
   * Bug #21644: Stack consistency error for the newrange INSN peephole
     optimization with chilled string
   * Bug #21668: Improve performance of UnicodeNormalize.canonical_ordering_one
   * Bug #21638: Ractor-local $DEBUG is not marked
   * Bug #21652: Marshal#dump documentation out-of-date/unclear regarding Data
     class
   * Bug #13671: Regexp with lookbehind and case-insensitivity raises
     RegexpError only on strings with certain characters
   * Bug #21625: Allow IO#wait_readable together with IO#ungetc even in text
     mode

    [27 lines not shown]

[mlir][Python] port dialect extensions to use core PyConcreteType, PyConcreteAttribute

[mlir][Python] move IRTypes and IRAttributes to public headers

[mlir] Avoid crash in mlir-query's MatchFinder class (#145049)

It was failing for cases where the location was not a FileLineColLoc and fileLoc a nullptr.

If the following query is run: 

`match getUsersByPredicate(hasOpName("memref.alloc"),
hasOpName("memref.dealloc"), true)`

on the IR illustrated below, it caused the program to crash.

``` mlir
func.func @slicing_linalg_op(%arg0 : index, %arg1 : index, %arg2 : index) {
  %a = memref.alloc(%arg0, %arg2) : memref<?x?xf32>
  %b = memref.alloc(%arg2, %arg1) : memref<?x?xf32>
  %c = memref.alloc(%arg0, %arg1) : memref<?x?xf32>
  %d = memref.alloc(%arg0, %arg1) : memref<?x?xf32>
  linalg.matmul ins(%a, %b : memref<?x?xf32>, memref<?x?xf32>)
               outs(%c : memref<?x?xf32>)

    [9 lines not shown]

jakub's suggestion

Reflect rename in bazel file

remove stray newline

move impls

address
jpienaar comments

factor out more impls

comments

address comments

check standalone

fix empty _mlir_python_support_libs

address comments

parameteriez add_mlir_python_modules

works

try MLIR_PYTHON_API_EXPORTED

remove registerError

globals doesn't work

try moving MLIR_BINDINGS_PYTHON_NB_DOMAIN compile defn

disable LTO by default

add standalone test/use of IRCore

restore DISABLE_INSTALL

set VISIBILITY_INLINES_HIDDEN for libMLIRPYthonSupport

format

massage cmake