[all-commits] [llvm/llvm-project] d54793: [SLU][profcheck] create likely branch weights for ...

[Mircea Trofin via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d54793113798f74424f21b94fe74bd675a11e801
      https://github.com/llvm/llvm-project/commit/d54793113798f74424f21b94fe74bd675a11e801
  Author: Mircea Trofin <mtrofin at google.com>
  Date:   2025-11-04 (Tue, 04 Nov 2025)

  Changed paths:
    M llvm/lib/Transforms/Scalar/SimpleLoopUnswitch.cpp
    M llvm/test/Transforms/SimpleLoopUnswitch/guards.ll

  Log Message:
  -----------
  [SLU][profcheck] create likely branch weights for guard->branch (#164271)

The `llvm.experimental.guard` intrinsic is a `call`, so its metadata - if present - would be one value (as per `Verifier::visitProfMetadata`). That wouldn't be a correct `branch_weights` metadata. Likely, `GI->getMetadata(LLVMContext::MD_prof)` was always `nullptr`.

We can bias away from deopt instead.

Issue #147390



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