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6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)

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Reviewed-by: kvn, rasbold
This commit is contained in:
Tom Rodriguez 2007-12-05 09:01:00 -08:00
parent 5fa349cc42
commit 10c473e425
16 changed files with 540 additions and 67 deletions
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55
hotspot/src/share/vm/opto/loopnode.cpp
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@ -651,7 +651,7 @@ const TypeInt* PhaseIdealLoop::filtered_type_from_dominators( Node* val, Node *u
while (if_cnt < if_limit) {
if ((pred->Opcode() == Op_IfTrue || pred->Opcode() == Op_IfFalse)) {
if_cnt++;
const TypeInt* if_t = filtered_type_at_if(val, pred);
const TypeInt* if_t = IfNode::filtered_int_type(&_igvn, val, pred);
if (if_t != NULL) {
if (rtn_t == NULL) {
rtn_t = if_t;
@ -674,59 +674,6 @@ const TypeInt* PhaseIdealLoop::filtered_type_from_dominators( Node* val, Node *u
}
//------------------------------filtered_type_at_if--------------------------------
// Return a possibly more restrictive type for val based on condition control flow for an if
const TypeInt* PhaseIdealLoop::filtered_type_at_if( Node* val, Node *if_proj) {
assert(if_proj &&
(if_proj->Opcode() == Op_IfTrue || if_proj->Opcode() == Op_IfFalse), "expecting an if projection");
if (if_proj->in(0) && if_proj->in(0)->is_If()) {
IfNode* iff = if_proj->in(0)->as_If();
if (iff->in(1) && iff->in(1)->is_Bool()) {
BoolNode* bol = iff->in(1)->as_Bool();
if (bol->in(1) && bol->in(1)->is_Cmp()) {
const CmpNode* cmp = bol->in(1)->as_Cmp();
if (cmp->in(1) == val) {
const TypeInt* cmp2_t = _igvn.type(cmp->in(2))->isa_int();
if (cmp2_t != NULL) {
jint lo = cmp2_t->_lo;
jint hi = cmp2_t->_hi;
BoolTest::mask msk = if_proj->Opcode() == Op_IfTrue ? bol->_test._test : bol->_test.negate();
switch (msk) {
case BoolTest::ne:
// Can't refine type
return NULL;
case BoolTest::eq:
return cmp2_t;
case BoolTest::lt:
lo = TypeInt::INT->_lo;
if (hi - 1 < hi) {
hi = hi - 1;
}
break;
case BoolTest::le:
lo = TypeInt::INT->_lo;
break;
case BoolTest::gt:
if (lo + 1 > lo) {
lo = lo + 1;
}
hi = TypeInt::INT->_hi;
break;
case BoolTest::ge:
// lo unchanged
hi = TypeInt::INT->_hi;
break;
}
const TypeInt* rtn_t = TypeInt::make(lo, hi, cmp2_t->_widen);
return rtn_t;
}
}
}
}
}
return NULL;
}
//------------------------------dump_spec--------------------------------------
// Dump special per-node info
#ifndef PRODUCT