[KnownBits] isNonZero() - avoid expensive countPopulation call. NFC.

We can just check for a null value.
llvm · Nov 8, 2020 · 9fd7710 · 9fd7710
1 parent e8dc17a
commit 9fd7710
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/llvm/include/llvm/Support/KnownBits.h b/llvm/include/llvm/Support/KnownBits.h
@@ -98,7 +98,7 @@ struct KnownBits {
   bool isNonNegative() const { return Zero.isSignBitSet(); }
 
   /// Returns true if this value is known to be non-zero.
-  bool isNonZero() const { return One.countPopulation() != 0; }
+  bool isNonZero() const { return !One.isNullValue(); }
 
   /// Returns true if this value is known to be positive.
   bool isStrictlyPositive() const { return Zero.isSignBitSet() && !One.isNullValue(); }