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

[Dhruv Chawla via Phabricator via llvm-commits]

0xdc03 updated this revision to Diff 542376.
0xdc03 added a comment.

- Change the patch order


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
@@ -4011,7 +4011,8 @@
   // If the comparison is with the result of a phi instruction, check whether
   // doing the compare with each incoming phi value yields a common result.
   if (isa<PHINode>(LHS) || isa<PHINode>(RHS))
-    if (Value *V = threadCmpOverPHI(Pred, LHS, RHS, Q, MaxRecurse))
+    if (Value *V = threadCmpOverPHI(Pred, LHS, RHS, Q,
+                                    MaxRecurse > 1 ? 1 : MaxRecurse))
       return V;
 
   return nullptr;
@@ -4237,7 +4238,8 @@
   // If the comparison is with the result of a phi instruction, check whether
   // doing the compare with each incoming phi value yields a common result.
   if (isa<PHINode>(LHS) || isa<PHINode>(RHS))
-    if (Value *V = threadCmpOverPHI(Pred, LHS, RHS, Q, MaxRecurse))
+    if (Value *V = threadCmpOverPHI(Pred, LHS, RHS, Q,
+                                    MaxRecurse > 1 ? 1 : MaxRecurse))
       return V;
 
   return nullptr;


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