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This commit is contained in:
Erik Trimble 2008-07-11 01:14:44 -07:00
commit 2d6f42d18c
513 changed files with 31554 additions and 2230 deletions
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9
hotspot/src/share/vm/opto/subnode.cpp
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@ -45,10 +45,13 @@ Node *SubNode::Identity( PhaseTransform *phase ) {
return in(2)->in(2);
}
// Convert "(X+Y) - Y" into X
// Convert "(X+Y) - Y" into X and "(X+Y) - X" into Y
if( in(1)->Opcode() == Op_AddI ) {
if( phase->eqv(in(1)->in(2),in(2)) )
return in(1)->in(1);
if (phase->eqv(in(1)->in(1),in(2)))
return in(1)->in(2);
// Also catch: "(X + Opaque2(Y)) - Y". In this case, 'Y' is a loop-varying
// trip counter and X is likely to be loop-invariant (that's how O2 Nodes
// are originally used, although the optimizer sometimes jiggers things).
@ -740,8 +743,8 @@ Node *CmpPNode::Ideal( PhaseGVN *phase, bool can_reshape ) {
// Simplify an CmpN (compare 2 pointers) node, based on local information.
// If both inputs are constants, compare them.
const Type *CmpNNode::sub( const Type *t1, const Type *t2 ) const {
const TypePtr *r0 = t1->is_narrowoop()->make_oopptr(); // Handy access
const TypePtr *r1 = t2->is_narrowoop()->make_oopptr();
const TypePtr *r0 = t1->make_ptr(); // Handy access
const TypePtr *r1 = t2->make_ptr();
// Undefined inputs makes for an undefined result
if( TypePtr::above_centerline(r0->_ptr) ||