Mercurial > hg > truffle
diff src/share/vm/opto/block.cpp @ 308:756b58154237
6611837: block frequency is zero
Summary: insert_goto_at should set frequency for newly created blocks
Reviewed-by: never
| author | rasbold |
|---|---|
| date | Thu, 28 Aug 2008 10:22:12 -0700 |
| parents | a61af66fc99e |
| children | 9ee9cf798b59 |
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--- a/src/share/vm/opto/block.cpp Wed Aug 27 16:33:34 2008 -0700 +++ b/src/share/vm/opto/block.cpp Thu Aug 28 10:22:12 2008 -0700 @@ -467,6 +467,10 @@ // get successor block succ_no assert(succ_no < in->_num_succs, "illegal successor number"); Block* out = in->_succs[succ_no]; + // Compute frequency of the new block. Do this before inserting + // new block in case succ_prob() needs to infer the probability from + // surrounding blocks. + float freq = in->_freq * in->succ_prob(succ_no); // get ProjNode corresponding to the succ_no'th successor of the in block ProjNode* proj = in->_nodes[in->_nodes.size() - in->_num_succs + succ_no]->as_Proj(); // create region for basic block @@ -491,6 +495,8 @@ } // remap predecessor's successor to new block in->_succs.map(succ_no, block); + // Set the frequency of the new block + block->_freq = freq; // add new basic block to basic block list _blocks.insert(block_no + 1, block); _num_blocks++;