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Implement Value* tracking for loads and stores in the selection DAG. This enables one to use alias analysis in the backends.

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(TRUNK)Stores and (EXT|ZEXT|SEXT)Loads have an extra SDOperand which is a SrcValueSDNode which contains the Value*.  Note that if the operation is introduced by the backend, it will still have the operand, but the value* will be null.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21599 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Lenharth
2005-04-27 20:10:01 +00:00
parent 22cab6c752
commit 2d86ea21dd
10 changed files with 145 additions and 67 deletions
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9
include/llvm/CodeGen/SelectionDAG.h
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@@ -161,6 +161,8 @@ public:
SDOperand N1, SDOperand N2);
SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
SDOperand N1, SDOperand N2, SDOperand N3);
SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4);
SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
std::vector<SDOperand> &Children);
@@ -172,11 +174,16 @@ public:
SDOperand N, MVT::ValueType EVT);
SDOperand getNode(unsigned Opcode, MVT::ValueType VT, SDOperand N1,
SDOperand N2, SDOperand N3, MVT::ValueType EVT);
SDOperand getNode(unsigned Opcode, MVT::ValueType VT, SDOperand N1,
SDOperand N2, SDOperand N3, SDOperand N4, MVT::ValueType EVT);
/// getLoad - Loads are not normal binary operators: their result type is not
/// determined by their operands, and they produce a value AND a token chain.
///
SDOperand getLoad(MVT::ValueType VT, SDOperand Chain, SDOperand Ptr);
SDOperand getLoad(MVT::ValueType VT, SDOperand Chain, SDOperand Ptr, SDOperand SV);
// getSrcValue - construct a node to track a Value* through the backend
SDOperand getSrcValue(const Value* I);
void replaceAllUsesWith(SDOperand Old, SDOperand New) {
assert(Old != New && "RAUW self!");