[PATCH] D154064: [InstructionSimplify] Limit threadCmpOverPHI recursion depth to 1

[Dhruv Chawla via Phabricator via llvm-commits]

0xdc03 updated this revision to Diff 542387.
0xdc03 added a comment.

- Fix some broken logic


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D154064/new/

https://reviews.llvm.org/D154064

Files:
  llvm/lib/Analysis/InstructionSimplify.cpp


Index: llvm/lib/Analysis/InstructionSimplify.cpp
===================================================================
--- llvm/lib/Analysis/InstructionSimplify.cpp
+++ llvm/lib/Analysis/InstructionSimplify.cpp
@@ -567,6 +567,9 @@
   if (!MaxRecurse--)
     return nullptr;
 
+  // Prevent this function from being recursively called more than once.
+  MaxRecurse = 0;
+
   // Make sure the phi is on the LHS.
   if (!isa<PHINode>(LHS)) {
     std::swap(LHS, RHS);


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