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| 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 | 8bcd5dcf5de7c2002d116aaef5a58531a0034071 (patch) | |
| tree | 8a6eaf34734817ea6c3ed2ea650f2cd435adcf15 /llvm/lib/Analysis/ProfileEstimatorPass.cpp | |
| parent | b683b6e2ce2ecb12844882a867a04005a26b1f98 (diff) | |
| download | bcm5719-llvm-8bcd5dcf5de7c2002d116aaef5a58531a0034071.tar.gz bcm5719-llvm-8bcd5dcf5de7c2002d116aaef5a58531a0034071.zip | |
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.
llvm-svn: 80667
Diffstat (limited to 'llvm/lib/Analysis/ProfileEstimatorPass.cpp')
| -rw-r--r-- | llvm/lib/Analysis/ProfileEstimatorPass.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/llvm/lib/Analysis/ProfileEstimatorPass.cpp b/llvm/lib/Analysis/ProfileEstimatorPass.cpp index 8f5313fda79..3af7eba94e3 100644 --- a/llvm/lib/Analysis/ProfileEstimatorPass.cpp +++ b/llvm/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) { |
