[PATCH] D99370: [CSSPGO] Minor tweak for inline candidate priority tie breaker

[Wenlei He via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rG5f59f407f59f: [CSSPGO] Minor tweak for inline candidate priority tie breaker (authored by wenlei).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D99370/new/

https://reviews.llvm.org/D99370

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


Index: llvm/lib/Transforms/IPO/SampleProfile.cpp
===================================================================
--- llvm/lib/Transforms/IPO/SampleProfile.cpp
+++ llvm/lib/Transforms/IPO/SampleProfile.cpp
@@ -321,11 +321,16 @@
     if (LHS.CallsiteCount != RHS.CallsiteCount)
       return LHS.CallsiteCount < RHS.CallsiteCount;
 
+    const FunctionSamples *LCS = LHS.CalleeSamples;
+    const FunctionSamples *RCS = RHS.CalleeSamples;
+    assert(LCS && RCS && "Expect non-null FunctionSamples");
+
+    // Tie breaker using number of samples try to favor smaller functions first
+    if (LCS->getBodySamples().size() != RCS->getBodySamples().size())
+      return LCS->getBodySamples().size() > RCS->getBodySamples().size();
+
     // Tie breaker using GUID so we have stable/deterministic inlining order
-    assert(LHS.CalleeSamples && RHS.CalleeSamples &&
-           "Expect non-null FunctionSamples");
-    return LHS.CalleeSamples->getGUID(LHS.CalleeSamples->getName()) <
-           RHS.CalleeSamples->getGUID(RHS.CalleeSamples->getName());
+    return LCS->getGUID(LCS->getName()) < RCS->getGUID(RCS->getName());
   }
 };
 


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