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Simplify some of the PHI node interfaces

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5700 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2003-03-05 21:15:12 +00:00
parent e2ca540e7c
commit 05ddff9b98
2 changed files with 18 additions and 17 deletions
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16
include/llvm/iPHINode.h
View File

@@ -61,7 +61,12 @@ public:
} }
/// addIncoming - Add an incoming value to the end of the PHI list /// addIncoming - Add an incoming value to the end of the PHI list
void addIncoming(Value *D, BasicBlock *BB); void addIncoming(Value *D, BasicBlock *BB) {
assert(getType() == D->getType() &&
"All operands to PHI node must be the same type as the PHI node!");
Operands.push_back(Use(D, this));
Operands.push_back(Use((Value*)BB, this));
}
/// removeIncomingValue - Remove an incoming value. This is useful if a /// removeIncomingValue - Remove an incoming value. This is useful if a
/// predecessor basic block is deleted. The value removed is returned. /// predecessor basic block is deleted. The value removed is returned.
@@ -71,8 +76,13 @@ public:
/// dummy values. The only time there should be zero incoming values to a PHI /// dummy values. The only time there should be zero incoming values to a PHI
/// node is when the block is dead, so this strategy is sound. /// node is when the block is dead, so this strategy is sound.
/// ///
Value *removeIncomingValue(const BasicBlock *BB, Value *removeIncomingValue(unsigned Idx, bool DeletePHIIfEmpty = true);
bool DeletePHIIfEmpty = true);
Value *removeIncomingValue(const BasicBlock *BB, bool DeletePHIIfEmpty =true){
int Idx = getBasicBlockIndex(BB);
assert(Idx >= 0 && "Invalid basic block argument to remove!");
return removeIncomingValue(Idx, DeletePHIIfEmpty);
}
/// getBasicBlockIndex - Return the first index of the specified basic /// getBasicBlockIndex - Return the first index of the specified basic
/// block in the value list for this PHI. Returns -1 if no instance. /// block in the value list for this PHI. Returns -1 if no instance.

19
lib/VMCore/InstrTypes.cpp
View File

@@ -33,22 +33,13 @@ PHINode::PHINode(const PHINode &PN)
} }
} }
void PHINode::addIncoming(Value *D, BasicBlock *BB) {
assert(getType() == D->getType() &&
"All operands to PHI node must be the same type as the PHI node!");
Operands.push_back(Use(D, this));
Operands.push_back(Use(BB, this));
}
// removeIncomingValue - Remove an incoming value. This is useful if a // removeIncomingValue - Remove an incoming value. This is useful if a
// predecessor basic block is deleted. // predecessor basic block is deleted.
Value *PHINode::removeIncomingValue(const BasicBlock *BB, Value *PHINode::removeIncomingValue(unsigned Idx, bool DeletePHIIfEmpty) {
bool DeletePHIIfEmpty) { assert(Idx*2 < Operands.size() && "BB not in PHI node!");
op_iterator Idx = find(Operands.begin(), Operands.end(), (const Value*)BB); Value *Removed = Operands[Idx*2];
assert(Idx != Operands.end() && "BB not in PHI node!"); Operands.erase(Operands.begin()+Idx*2, // Erase Value and BasicBlock
--Idx; // Back up to value prior to Basic block Operands.begin()+Idx*2+2);
Value *Removed = *Idx;
Operands.erase(Idx, Idx+2); // Erase Value and BasicBlock
// If the PHI node is dead, because it has zero entries, nuke it now. // If the PHI node is dead, because it has zero entries, nuke it now.
if (getNumOperands() == 0 && DeletePHIIfEmpty) { if (getNumOperands() == 0 && DeletePHIIfEmpty) {