Begin collecting some of the statistics for block placement discussed on

the mailing list. Suggestions for other statistics to collect would be
awesome. =]

Currently these are implemented as a separate pass guarded by a separate
flag. I'm not thrilled by that, but I wanted to be able to collect the
statistics for the old code placement as well as the new in order to
have a point of comparison. I'm planning on folding them into the single
pass if / when there is only one pass of interest.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143537 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 6 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/Passes.h b/include/llvm/CodeGen/Passes.h
index 7d0c412a1b..bf440f4ccf 100644
--- a/include/llvm/CodeGen/Passes.h
+++ b/include/llvm/CodeGen/Passes.h
@@ -159,6 +159,11 @@ namespace llvm {
   /// probabilities.
   FunctionPass *createMachineBlockPlacementPass();
 
+  /// MachineBlockPlacementStats Pass - This pass collects statistics about the
+  /// basic block placement using branch probabilities and block frequency
+  /// information.
+  FunctionPass *createMachineBlockPlacementStatsPass();
+
   /// Code Placement Pass - This pass optimize code placement and aligns loop
   /// headers to target specific alignment boundary.
   FunctionPass *createCodePlacementOptPass();
diff --git a/include/llvm/InitializePasses.h b/include/llvm/InitializePasses.h
index b5344fccf8..47a7779608 100644
--- a/include/llvm/InitializePasses.h
+++ b/include/llvm/InitializePasses.h
@@ -147,6 +147,7 @@ void initializeLowerInvokePass(PassRegistry&);
 void initializeLowerSwitchPass(PassRegistry&);
 void initializeMachineBlockFrequencyInfoPass(PassRegistry&);
 void initializeMachineBlockPlacementPass(PassRegistry&);
+void initializeMachineBlockPlacementStatsPass(PassRegistry&);
 void initializeMachineBranchProbabilityInfoPass(PassRegistry&);
 void initializeMachineCSEPass(PassRegistry&);
 void initializeMachineDominatorTreePass(PassRegistry&);