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Add statistics for tail duplication.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89225 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bob Wilson 2009-11-18 19:29:37 +00:00
parent ebb5cb9216
commit 7cd5d3e05c
1 changed files with 4 additions and 0 deletions
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4
lib/CodeGen/BranchFolding.cpp
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@ -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