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6384206: Phis which are later unneeded are impairing our ability to inline based on static types

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Reviewed-by: rasbold, jrose
This commit is contained in:
Tom Rodriguez 2008-09-17 12:59:52 -07:00
parent eee15b163e
commit 4b1e242299
18 changed files with 1082 additions and 401 deletions
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13
hotspot/src/share/vm/ci/ciMethodBlocks.cpp
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@ -49,7 +49,7 @@ bool ciMethodBlocks::is_block_start(int bci) {
// first half. Returns the range beginning at bci.
ciBlock *ciMethodBlocks::split_block_at(int bci) {
ciBlock *former_block = block_containing(bci);
ciBlock *new_block = new(_arena) ciBlock(_method, _num_blocks++, this, former_block->start_bci());
ciBlock *new_block = new(_arena) ciBlock(_method, _num_blocks++, former_block->start_bci());
_blocks->append(new_block);
assert(former_block != NULL, "must not be NULL");
new_block->set_limit_bci(bci);
@ -83,7 +83,7 @@ ciBlock *ciMethodBlocks::make_block_at(int bci) {
if (cb == NULL ) {
// This is our first time visiting this bytecode. Create
// a fresh block and assign it this starting point.
ciBlock *nb = new(_arena) ciBlock(_method, _num_blocks++, this, bci);
ciBlock *nb = new(_arena) ciBlock(_method, _num_blocks++, bci);
_blocks->append(nb);
_bci_to_block[bci] = nb;
return nb;
@ -98,6 +98,11 @@ ciBlock *ciMethodBlocks::make_block_at(int bci) {
}
}
ciBlock *ciMethodBlocks::make_dummy_block() {
ciBlock *dum = new(_arena) ciBlock(_method, -1, 0);
return dum;
}
void ciMethodBlocks::do_analysis() {
ciBytecodeStream s(_method);
ciBlock *cur_block = block_containing(0);
@ -253,7 +258,7 @@ ciMethodBlocks::ciMethodBlocks(Arena *arena, ciMethod *meth): _method(meth),
Copy::zero_to_words((HeapWord*) _bci_to_block, b2bsize / sizeof(HeapWord));
// create initial block covering the entire method
ciBlock *b = new(arena) ciBlock(_method, _num_blocks++, this, 0);
ciBlock *b = new(arena) ciBlock(_method, _num_blocks++, 0);
_blocks->append(b);
_bci_to_block[0] = b;
@ -334,7 +339,7 @@ void ciMethodBlocks::dump() {
#endif
ciBlock::ciBlock(ciMethod *method, int index, ciMethodBlocks *mb, int start_bci) :
ciBlock::ciBlock(ciMethod *method, int index, int start_bci) :
#ifndef PRODUCT
_method(method),
#endif