[all-commits] [llvm/llvm-project] fb2d67: [CIR] Support zero-result ops in clangir TableGen ...

[Jiahao Guo via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: fb2d6709f289525497cdf731bf32085401c6b962
      https://github.com/llvm/llvm-project/commit/fb2d6709f289525497cdf731bf32085401c6b962
  Author: Jiahao Guo <eoonguo at gmail.com>
  Date:   2026-06-10 (Wed, 10 Jun 2026)

  Changed paths:
    M clang/include/clang/CIR/Dialect/IR/CIROps.td
    M clang/lib/CIR/Lowering/DirectToLLVM/LowerToLLVM.cpp
    M clang/utils/TableGen/CIRLoweringEmitter.cpp

  Log Message:
  -----------
  [CIR] Support zero-result ops in clangir TableGen lowering (#202273)

### summary 

This is follow-up to https://github.com/llvm/llvm-project/pull/199599

A CIR op can set the llvmOp field to have cir-tblgen auto-generate its
CIR→LLVM lowering instead of using a hand-written pattern.However, the
generated body forwards the result type via op.getType(), which only
compiles for single-result ops. As a result, ops with zero results could
not use this feature.

To fix this, teach CIRLoweringEmitter to emit an empty mlir::TypeRange{}
for zero-result ops. Then switch cir.lifetime.start and cir.lifetime.end
to use llvmOp (dropping their hand-written lowering). The lifetime.cir
test covers the generated path.



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications