[all-commits] [llvm/llvm-project] f0687b: [IRGen] Handle infinite cycles in findDominatingSt...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f0687b47a0ce82da07127fee4fe6af801df54ca6
      https://github.com/llvm/llvm-project/commit/f0687b47a0ce82da07127fee4fe6af801df54ca6
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2023-05-24 (Wed, 24 May 2023)

  Changed paths:
    M clang/lib/CodeGen/CGCall.cpp
    A clang/test/CodeGen/dominating-store-infinite-cycle.c

  Log Message:
  -----------
  [IRGen] Handle infinite cycles in findDominatingStoreToReturnValue.

If there is an infinite cycle in the IR, the loop will never exit. Keep
track of visited basic blocks in a set and return nullptr if a block is
visited again.

Fixes #62830.

Reviewed By: rjmccall

Differential Revision: https://reviews.llvm.org/D151076