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6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops

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Generate addresses and implicit null checks with narrow oops to avoid decoding.

Reviewed-by: jrose, never
This commit is contained in:
Vladimir Kozlov 2008-05-29 12:04:14 -07:00
parent 646ceb4a45
commit a1f50998ae
20 changed files with 138 additions and 81 deletions
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12
hotspot/src/share/vm/opto/node.hpp
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@ -53,6 +53,8 @@ class ConstraintCastNode;
class ConNode;
class CountedLoopNode;
class CountedLoopEndNode;
class DecodeNNode;
class EncodePNode;
class FastLockNode;
class FastUnlockNode;
class IfNode;
@ -438,6 +440,12 @@ private:
public:
// Globally replace this node by a given new node, updating all uses.
void replace_by(Node* new_node);
// Globally replace this node by a given new node, updating all uses
// and cutting input edges of old node.
void subsume_by(Node* new_node) {
replace_by(new_node);
disconnect_inputs(NULL);
}
void set_req_X( uint i, Node *n, PhaseIterGVN *igvn );
// Find the one non-null required input. RegionNode only
Node *nonnull_req() const;
@ -577,6 +585,8 @@ public:
DEFINE_CLASS_ID(CheckCastPP, Type, 2)
DEFINE_CLASS_ID(CMove, Type, 3)
DEFINE_CLASS_ID(SafePointScalarObject, Type, 4)
DEFINE_CLASS_ID(DecodeN, Type, 5)
DEFINE_CLASS_ID(EncodeP, Type, 6)
DEFINE_CLASS_ID(Mem, Node, 6)
DEFINE_CLASS_ID(Load, Mem, 0)
@ -685,6 +695,8 @@ public:
DEFINE_CLASS_QUERY(Cmp)
DEFINE_CLASS_QUERY(CountedLoop)
DEFINE_CLASS_QUERY(CountedLoopEnd)
DEFINE_CLASS_QUERY(DecodeN)
DEFINE_CLASS_QUERY(EncodeP)
DEFINE_CLASS_QUERY(FastLock)
DEFINE_CLASS_QUERY(FastUnlock)
DEFINE_CLASS_QUERY(If)