[PATCH] D82295: [IR] Short-circuit comparison with itself for Attributes

[Danila Malyutin via Phabricator via llvm-commits]

danilaml updated this revision to Diff 272677.

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D82295/new/

https://reviews.llvm.org/D82295

Files:
  llvm/lib/IR/Attributes.cpp
  llvm/unittests/IR/AttributesTest.cpp


Index: llvm/unittests/IR/AttributesTest.cpp
===================================================================
--- llvm/unittests/IR/AttributesTest.cpp
+++ llvm/unittests/IR/AttributesTest.cpp
@@ -44,6 +44,7 @@
   Attribute ByVal = Attribute::get(C, Attribute::ByVal, Type::getInt32Ty(C));
   EXPECT_FALSE(ByVal < Attribute::get(C, Attribute::ZExt));
   EXPECT_TRUE(ByVal < Align4);
+  EXPECT_FALSE(ByVal < ByVal);
 
   AttributeList ASs[] = {AttributeList::get(C, 2, Attribute::ZExt),
                          AttributeList::get(C, 1, Attribute::SExt)};
Index: llvm/lib/IR/Attributes.cpp
===================================================================
--- llvm/lib/IR/Attributes.cpp
+++ llvm/lib/IR/Attributes.cpp
@@ -597,6 +597,8 @@
 }
 
 bool AttributeImpl::operator<(const AttributeImpl &AI) const {
+  if (this == &AI)
+    return false;
   // This sorts the attributes with Attribute::AttrKinds coming first (sorted
   // relative to their enum value) and then strings.
   if (isEnumAttribute()) {


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