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| author | Bob Wilson <bob.wilson@apple.com> | 2009-11-18 19:29:37 +0000 |
|---|---|---|
| committer | Bob Wilson <bob.wilson@apple.com> | 2009-11-18 19:29:37 +0000 |
| commit | 7cd5d3e05ca9573dbac1a01846813037f901480c (patch) | |
| tree | 4ab46acb6c9da2921dfd640177437653b83b9887 /lib/CodeGen/BranchFolding.cpp | |
| parent | ebb5cb92169a04dd94fa65ae18aead271db3a4e5 (diff) | |
| download | llvm-7cd5d3e05ca9573dbac1a01846813037f901480c.tar.gz llvm-7cd5d3e05ca9573dbac1a01846813037f901480c.tar.bz2 llvm-7cd5d3e05ca9573dbac1a01846813037f901480c.tar.xz | |
Add statistics for tail duplication.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89225 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/BranchFolding.cpp')
| -rw-r--r-- | lib/CodeGen/BranchFolding.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/CodeGen/BranchFolding.cpp b/lib/CodeGen/BranchFolding.cpp index 94bfb7204b..e0a7825a26 100644 --- a/lib/CodeGen/BranchFolding.cpp +++ b/lib/CodeGen/BranchFolding.cpp @@ -41,8 +41,11 @@ using namespace llvm; STATISTIC(NumDeadBlocks, "Number of dead blocks removed"); STATISTIC(NumBranchOpts, "Number of branches optimized"); STATISTIC(NumTailMerge , "Number of block tails merged"); +STATISTIC(NumTailDups , "Number of tail duplicated blocks"); + static cl::opt<cl::boolOrDefault> FlagEnableTailMerge("enable-tail-merge", cl::init(cl::BOU_UNSET), cl::Hidden); + // Throttle for huge numbers of predecessors (compile speed problems) static cl::opt<unsigned> TailMergeThreshold("tail-merge-threshold", @@ -1107,6 +1110,7 @@ bool BranchFolder::TailDuplicate(MachineBasicBlock *TailBB, PredBB->addSuccessor(*I); Changed = true; + ++NumTailDups; } // If TailBB was duplicated into all its predecessors except for the prior |