[Mlir-commits] [clang] [mlir] [CIR] Add CIRABIRewriteContext for ABI function/call rewriting (PR #192119)

[llvmlistbot at llvm.org]

adams381 wrote:

Closing this in favor of a series of smaller, focused PRs per @andykaylor's review feedback to break it down into smaller pieces.

The split:

- #195725 — `[mlir][ABI]` Test target + classification injection helper. Dialect-agnostic foundation that lets the rest of the series write `cir-opt`-driven `.cir` tests against the rewriter without depending on the in-progress LLVM ABI library targets.
- #195737 — `[CIR]` `CallConvLowering` pass + Direct/Ignore ABI rewriting. The actual MLIR pass and `CIRABIRewriteContext` skeleton.
- #195745 — `[CIR]` Extend (signext/zeroext) handling.
- #195879 — `[CIR]` Direct coerce-in-registers + new `cir.reinterpret_cast` op + your five inline review comments addressed.

Subsequent PRs in the series cover Indirect/sret, Indirect/byval, and Expand/flatten, replacing #192124.

The C++ unit tests from this PR are ported to `cir-opt`-driven `.cir` tests across the new series (audit table in #195737's description).


https://github.com/llvm/llvm-project/pull/192119