[llvm-profdata] Add SaturatingAdd/SaturatingMultiply Helper Functions

[oota-llvm.git] / include / llvm / ProfileData / SampleProf.h

diff --git a/include/llvm/ProfileData/SampleProf.h b/include/llvm/ProfileData/SampleProf.h
index d7596d7b1b77340f924978caf5e9024c2957a5cf..a8960cf7bc12032295c11da4a9574afde0f0f188 100644 (file)
--- a/include/llvm/ProfileData/SampleProf.h
+++ b/include/llvm/ProfileData/SampleProf.h
@@ -173,10 +173,7 @@ public:
   /// Sample counts accumulate using saturating arithmetic, to avoid wrapping
   /// around unsigned integers.
   void addSamples(uint64_t S) {
-    if (NumSamples <= std::numeric_limits<uint64_t>::max() - S)
-      NumSamples += S;
-    else
-      NumSamples = std::numeric_limits<uint64_t>::max();
+    NumSamples = SaturatingAdd(NumSamples, S);
   }
 
   /// Add called function \p F with samples \p S.
@@ -185,10 +182,7 @@ public:
   /// around unsigned integers.
   void addCalledTarget(StringRef F, uint64_t S) {
     uint64_t &TargetSamples = CallTargets[F];
-    if (TargetSamples <= std::numeric_limits<uint64_t>::max() - S)
-      TargetSamples += S;
-    else
-      TargetSamples = std::numeric_limits<uint64_t>::max();
+    TargetSamples = SaturatingAdd(TargetSamples, S);
   }
 
   /// Return true if this sample record contains function calls.