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6611837: block frequency is zero

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Insert_goto_at should set frequency for newly created blocks

Reviewed-by: never
This commit is contained in:
Chuck Rasbold 2008-08-28 10:22:12 -07:00
parent 8ab0a4d7a9
commit bdd62705f2
2 changed files with 30 additions and 1 deletions
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6
hotspot/src/share/vm/opto/block.cpp
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@ -467,6 +467,10 @@ void PhaseCFG::insert_goto_at(uint block_no, uint succ_no) {
// 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 @@ void PhaseCFG::insert_goto_at(uint block_no, uint succ_no) {
}
// 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++;