[PATCH] D71852: [Attributor] Reach optimistic fixpoint in AAValueSimplify when the value is constant or undef

[Hideto Ueno via Phabricator via llvm-commits]

uenoku updated this revision to Diff 235250.
uenoku added a comment.

Small fix.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D71852/new/

https://reviews.llvm.org/D71852

Files:
  llvm/lib/Transforms/IPO/Attributor.cpp


Index: llvm/lib/Transforms/IPO/Attributor.cpp
===================================================================
--- llvm/lib/Transforms/IPO/Attributor.cpp
+++ llvm/lib/Transforms/IPO/Attributor.cpp
@@ -3970,6 +3970,14 @@
     return Changed | AAValueSimplify::manifest(A);
   }
 
+  /// See AbstractState::indicatePessimisticFixpoint(...).
+  ChangeStatus indicatePessimisticFixpoint() override {
+    // NOTE: Associated value will be returned in a pessimistic fixpoint and is
+    // regarded as known. That's why`indicateOptimisticFixpoint` is called.
+    SimplifiedAssociatedValue = &getAssociatedValue();
+    return indicateOptimisticFixpoint();
+  }
+
 protected:
   // An assumed simplified value. Initially, it is set to Optional::None, which
   // means that the value is not clear under current assumption. If in the
@@ -4069,7 +4077,7 @@
     Value &V = getAnchorValue();
 
     // TODO: add other stuffs
-    if (isa<Constant>(V) || isa<UndefValue>(V))
+    if (isa<Constant>(V))
       indicatePessimisticFixpoint();
   }
 


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