llvm-project

a5d2f05b - [mlir][ArithToLLVM] Fix index lowering for addui_extended (#223265)

[mlir][ArithToLLVM] Fix index lowering for addui_extended (#223265) Lowering `arith.addui_extended` with `index` operands fails because the LLVM result struct uses the unconverted sum type, even though the operands have already been converted. Convert the sum type before constructing the LLVM result struct. Extend the existing index-bitwidth tests to cover `arith.addui_extended` at 32-, 64-, and 128-bit widths, reusing their RUN lines. Rename `constant-index-bitwidth.mlir` to `index-bitwidth.mlir` to reflect the broader coverage. This preserves the operation's existing `index` support and uses the converted index width for the overflow intrinsic. Related discussion of `index` support in extended arithmetic: https://github.com/llvm/llvm-project/pull/85973. The index reproducer fails without the fix. All five ArithToLLVM test files pass with assertions enabled on upstream base `4098f568c4`, including the 32-, 64-, and 128-bit index lowering checks. Addresses the lowering failure reported in https://github.com/llvm/llvm-project/issues/84986. Assisted-by: Codex