[BOLT] Deprecating hfsort+ in favor of cdsort

Author: spupyrev

bolt/include/bolt/Passes/HFSort.h

@@ -9,11 +9,10 @@
 // Implementation of HFSort algorithm for function ordering:
 // https://research.fb.com/wp-content/uploads/2017/01/cgo2017-hfsort-final1.pdf
 //
-// Cluster functions by hotness.  There are four clustering algorithms:
+// Cluster functions by hotness.  There are three clustering algorithms:
 // 1. clusterize
-// 2. HFsort+
-// 3. pettisAndHansen
-// 4. randomClusters
+// 2. pettisAndHansen
+// 3. randomClusters
 //
 //===----------------------------------------------------------------------===//
 
@@ -81,11 +80,6 @@ inline bool compareClustersDensity(const Cluster &C1, const Cluster &C2) {
  */
 std::vector<Cluster> clusterize(const CallGraph &Cg);
 
-/*
- * Optimize function placement prioritizing i-TLB and i-cache performance.
- */
-std::vector<Cluster> hfsortPlus(CallGraph &Cg);
-
 /*
  * Pettis-Hansen code layout algorithm
  * reference: K. Pettis and R. C. Hansen, "Profile Guided Code Positioning",

bolt/lib/Passes/CMakeLists.txt

@@ -16,7 +16,6 @@ add_llvm_library(LLVMBOLTPasses
   FixRelaxationPass.cpp
   FixRISCVCallsPass.cpp
   HFSort.cpp
-  HFSortPlus.cpp
   Hugify.cpp
   IdenticalCodeFolding.cpp
   IndirectCallPromotion.cpp