History

[MLIR][ArithToLLVM] Fix index_cast on memref types generating invalid LLVM IR (#189227 )

`arith.index_cast` and `arith.index_castui` accept memref operands (via
`IndexCastTypeConstraint`), but `IndexCastOpLowering::matchAndRewrite`
did not handle this case. When the operand was a memref, the conversion
framework substituted the converted LLVM struct type, and the lowering
incorrectly attempted to emit `llvm.sext`/`llvm.zext`/`llvm.trunc` on a
struct value, producing invalid LLVM IR.

Since LLVM uses opaque pointers, all memrefs with integer or index
element types lower to the same `\!llvm.struct<(ptr, ptr, i64, ...)>`
type, making `arith.index_cast` on memrefs a no-op at the LLVM level.
Add a check that treats the memref case as an identity conversion (same
as the same-bit-width path).

Fixes #92377

Assisted-by: Claude Code

2026-04-01 11:03:14 +02:00

benchmark/python

…

cmake/modules

[mlir-python] Fix duplicate EnumAttr builder registration across dialects. (#187191 )

2026-03-19 21:02:23 -07:00

docs

[mlir][docs] dialect interfaces and mlir reduce documentation fix (#189258 )

2026-03-31 15:23:13 +00:00

examples

[MLIR] Add missing dialects to C API (#82190 )

2026-01-07 12:51:33 -08:00