diff options
| author | Andreas Neustifter <astifter-llvm@gmx.at> | 2009-09-01 10:06:05 +0000 |
|---|---|---|
| committer | Andreas Neustifter <astifter-llvm@gmx.at> | 2009-09-01 10:06:05 +0000 |
| commit | e885af9fb773f5a01a5b31fa0a0b7fd0489bde56 (patch) | |
| tree | c78caf02d8f9bab167ab83f8649a8de7a2fe799c /lib/Analysis/ProfileEstimatorPass.cpp | |
| parent | e7ddcfdebe357b4067f9c7d68d44616e11351a23 (diff) | |
| download | llvm-e885af9fb773f5a01a5b31fa0a0b7fd0489bde56.tar.gz llvm-e885af9fb773f5a01a5b31fa0a0b7fd0489bde56.tar.bz2 llvm-e885af9fb773f5a01a5b31fa0a0b7fd0489bde56.tar.xz | |
Preparation for Optimal Edge Profiling:
Optimal edge profiling is only possible when blocks with no predecessors get an
virtual edge (BB,0) that counts the execution frequencies of this
function-exiting blocks.
This patch makes the necessary changes before actually enabling optimal edge profiling.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80667 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/ProfileEstimatorPass.cpp')
| -rw-r--r-- | lib/Analysis/ProfileEstimatorPass.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/lib/Analysis/ProfileEstimatorPass.cpp b/lib/Analysis/ProfileEstimatorPass.cpp index 8f5313fda7..3af7eba94e 100644 --- a/lib/Analysis/ProfileEstimatorPass.cpp +++ b/lib/Analysis/ProfileEstimatorPass.cpp @@ -168,7 +168,14 @@ void ProfileEstimatorPass::recurseBasicBlock(BasicBlock *BB) { std::set<BasicBlock*> ProcessedSuccs; // Otherwise consider weight of outgoing edges and store them for - // distribution of remaining weight. + // distribution of remaining weight. In case the block has no successors + // create a (BB,0) edge. + succ_iterator bbi = succ_begin(BB), bbe = succ_end(BB); + if (bbi == bbe) { + Edge edge = getEdge(BB,0); + EdgeInformation[BB->getParent()][edge] = BBWeight; + printEdgeWeight(edge); + } for ( succ_iterator bbi = succ_begin(BB), bbe = succ_end(BB); bbi != bbe; ++bbi ) { if (ProcessedSuccs.insert(*bbi).second) { |