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- Dramatically simplify the Constant::mutateReferences implementation,

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allowing it to be called on all constant types (structures/arrays)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4160 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2002-10-14 03:30:23 +00:00
parent 9e932bd566
commit 34048e2ace
4 changed files with 23 additions and 38 deletions
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2
include/llvm/Constant.h
View File

@ -79,7 +79,7 @@ public:
// WARNING: Only to be used by Bytecode & Assembly Parsers! USER CODE SHOULD
// NOT USE THIS!!
// Returns the number of uses of OldV that were replaced.
virtual unsigned mutateReferences(Value* OldV, Value *NewV) { return 0; }
unsigned mutateReferences(Value* OldV, Value *NewV);
// END WARNING!!
};

14
include/llvm/Constants.h
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@ -439,12 +439,6 @@ public:
static inline bool classof(const Value *V) {
return isa<ConstantPointer>(V) && classof(cast<ConstantPointer>(V));
}
// WARNING: Only to be used by Bytecode & Assembly Parsers! USER CODE SHOULD
// NOT USE THIS!!
// Returns the number of uses of OldV that were replaced.
virtual unsigned mutateReferences(Value* OldV, Value *NewV);
// END WARNING!!
};
@ -502,14 +496,6 @@ public:
static inline bool classof(const Value *V) {
return isa<Constant>(V) && classof(cast<Constant>(V));
}
public:
// WARNING: Only to be used by Bytecode & Assembly Parsers! USER CODE SHOULD
// NOT USE THIS!!
// Returns the number of uses of OldV that were replaced.
virtual unsigned mutateReferences(Value* OldV, Value *NewV);
// END WARNING!!
};
#endif

3
include/llvm/Module.h
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@ -59,7 +59,8 @@ private:
SymbolTable *SymTab;
// Accessor for the underlying GlobalValRefMap... only through the
// ConstantPointerRef class...
// Constant class...
friend class Constant;
friend class ConstantPointerRef;
void mutateConstantPointerRef(GlobalValue *OldGV, GlobalValue *NewGV);
ConstantPointerRef *getConstantPointerRef(GlobalValue *GV);

42
lib/VMCore/Constants.cpp
View File

@ -685,27 +685,25 @@ const char *ConstantExpr::getOpcodeName() const {
return Instruction::getOpcodeName(getOpcode());
}
unsigned Constant::mutateReferences(Value *OldV, Value *NewV) {
// Uses of constant pointer refs are global values, not constants!
if (ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(this)) {
GlobalValue *NewGV = cast<GlobalValue>(NewV);
GlobalValue *OldGV = CPR->getValue();
//---- ConstantPointerRef::mutateReferences() implementation...
//
unsigned ConstantPointerRef::mutateReferences(Value *OldV, Value *NewV) {
assert(getValue() == OldV && "Cannot mutate old value if I'm not using it!");
GlobalValue *NewGV = cast<GlobalValue>(NewV);
getValue()->getParent()->mutateConstantPointerRef(getValue(), NewGV);
Operands[0] = NewGV;
return 1;
}
//---- ConstantPointerExpr::mutateReferences() implementation...
//
unsigned ConstantExpr::mutateReferences(Value* OldV, Value *NewV) {
unsigned NumReplaced = 0;
Constant *NewC = cast<Constant>(NewV);
for (unsigned i = 0, N = getNumOperands(); i != N; ++i)
if (Operands[i] == OldV) {
++NumReplaced;
Operands[i] = NewC;
}
return NumReplaced;
assert(OldGV == OldV && "Cannot mutate old value if I'm not using it!");
OldGV->getParent()->mutateConstantPointerRef(OldGV, NewGV);
Operands[0] = NewGV;
return 1;
} else {
Constant *NewC = cast<Constant>(NewV);
unsigned NumReplaced = 0;
for (unsigned i = 0, N = getNumOperands(); i != N; ++i)
if (Operands[i] == OldV) {
++NumReplaced;
Operands[i] = NewC;
}
return NumReplaced;
}
}