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src/hotspot/share/opto/narrowptrnode.cpp

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  25 #include "precompiled.hpp"
  26 #include "opto/narrowptrnode.hpp"
  27 #include "opto/phaseX.hpp"
  28 
  29 Node* DecodeNNode::Identity(PhaseGVN* phase) {
  30   const Type *t = phase->type( in(1) );
  31   if( t == Type::TOP ) return in(1);
  32 
  33   if (in(1)->is_EncodeP()) {
  34     // (DecodeN (EncodeP p)) -> p
  35     return in(1)->in(1);
  36   }
  37   return this;
  38 }
  39 
  40 const Type* DecodeNNode::Value(PhaseGVN* phase) const {
  41   const Type *t = phase->type( in(1) );
  42   if (t == Type::TOP) return Type::TOP;
  43   if (t == TypeNarrowOop::NULL_PTR) return TypePtr::NULL_PTR;
  44 
  45   assert(t->isa_narrowoop(), "only  narrowoop here");
  46   return t->make_ptr();
  47 }
  48 
  49 Node* EncodePNode::Identity(PhaseGVN* phase) {
  50   const Type *t = phase->type( in(1) );
  51   if( t == Type::TOP ) return in(1);
  52 
  53   if (in(1)->is_DecodeN()) {
  54     // (EncodeP (DecodeN p)) -> p
  55     return in(1)->in(1);
  56   }
  57   return this;
  58 }
  59 
  60 const Type* EncodePNode::Value(PhaseGVN* phase) const {
  61   const Type *t = phase->type( in(1) );
  62   if (t == Type::TOP) return Type::TOP;
  63   if (t == TypePtr::NULL_PTR) return TypeNarrowOop::NULL_PTR;
  64 
  65   assert(t->isa_oop_ptr(), "only oopptr here");




  25 #include "precompiled.hpp"
  26 #include "opto/narrowptrnode.hpp"
  27 #include "opto/phaseX.hpp"
  28 
  29 Node* DecodeNNode::Identity(PhaseGVN* phase) {
  30   const Type *t = phase->type( in(1) );
  31   if( t == Type::TOP ) return in(1);
  32 
  33   if (in(1)->is_EncodeP()) {
  34     // (DecodeN (EncodeP p)) -> p
  35     return in(1)->in(1);
  36   }
  37   return this;
  38 }
  39 
  40 const Type* DecodeNNode::Value(PhaseGVN* phase) const {
  41   const Type *t = phase->type( in(1) );
  42   if (t == Type::TOP) return Type::TOP;
  43   if (t == TypeNarrowOop::NULL_PTR) return TypePtr::NULL_PTR;
  44 
  45   assert(t->isa_narrowoop(), "only narrowoop here");
  46   return t->make_ptr();
  47 }
  48 
  49 Node* EncodePNode::Identity(PhaseGVN* phase) {
  50   const Type *t = phase->type( in(1) );
  51   if( t == Type::TOP ) return in(1);
  52 
  53   if (in(1)->is_DecodeN()) {
  54     // (EncodeP (DecodeN p)) -> p
  55     return in(1)->in(1);
  56   }
  57   return this;
  58 }
  59 
  60 const Type* EncodePNode::Value(PhaseGVN* phase) const {
  61   const Type *t = phase->type( in(1) );
  62   if (t == Type::TOP) return Type::TOP;
  63   if (t == TypePtr::NULL_PTR) return TypeNarrowOop::NULL_PTR;
  64 
  65   assert(t->isa_oop_ptr(), "only oopptr here");


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