[PATCH] D144621: [Assignment Tracking][NFC] Avoid doing some work when maps have same keys

[Orlando Cazalet-Hyams via Phabricator via llvm-commits]

This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG258c806b4125: [Assignment Tracking][NFC] Avoid doing some work when maps have same keys (authored by Orlando).

Changed prior to commit:
  https://reviews.llvm.org/D144621?vs=499750&id=499861#toc

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D144621/new/

https://reviews.llvm.org/D144621

Files:
  llvm/lib/CodeGen/AssignmentTrackingAnalysis.cpp


Index: llvm/lib/CodeGen/AssignmentTrackingAnalysis.cpp
===================================================================
--- llvm/lib/CodeGen/AssignmentTrackingAnalysis.cpp
+++ llvm/lib/CodeGen/AssignmentTrackingAnalysis.cpp
@@ -1630,6 +1630,10 @@
   unsigned IntersectSize = Join.size();
   (void)IntersectSize;
 
+  // Check if A and B contain the same variables.
+  if (SymmetricDifference.empty() && A.size() == B.size())
+    return Join;
+
   // Add the elements in B with variables that are not in A into
   // SymmetricDifference.
   for (const auto &Pair : B) {
@@ -1721,6 +1725,10 @@
   unsigned IntersectSize = Join.size();
   (void)IntersectSize;
 
+  // Check if A and B contain the same variables.
+  if (SymmetricDifference.empty() && A.size() == B.size())
+    return Join;
+
   // Add the elements in B with variables that are not in A into
   // SymmetricDifference.
   for (const auto &Pair : B) {


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