} else if (NewParent) {
NewParent->getBasicBlockList().push_back(this);
}
-
+
setName(Name);
}
BA->destroyConstant();
}
}
-
+
assert(getParent() == 0 && "BasicBlock still linked into the program!");
dropAllReferences();
InstList.clear();
return &*i;
}
+Instruction* BasicBlock::getFirstNonPHIOrDbgOrLifetime() {
+ // All valid basic blocks should have a terminator,
+ // which is not a PHINode. If we have an invalid basic
+ // block we'll get an assertion failure when dereferencing
+ // a past-the-end iterator.
+ BasicBlock::iterator i = begin();
+ for (;; ++i) {
+ if (isa<PHINode>(i) || isa<DbgInfoIntrinsic>(i))
+ continue;
+
+ const IntrinsicInst *II = dyn_cast<IntrinsicInst>(i);
+ if (!II)
+ break;
+ if (II->getIntrinsicID() != Intrinsic::lifetime_start &&
+ II->getIntrinsicID() != Intrinsic::lifetime_end)
+ break;
+ }
+ return &*i;
+}
+
void BasicBlock::dropAllReferences() {
for(iterator I = begin(), E = end(); I != E; ++I)
I->dropAllReferences();
/// getUniquePredecessor - If this basic block has a unique predecessor block,
/// return the block, otherwise return a null pointer.
-/// Note that unique predecessor doesn't mean single edge, there can be
-/// multiple edges from the unique predecessor to this block (for example
+/// Note that unique predecessor doesn't mean single edge, there can be
+/// multiple edges from the unique predecessor to this block (for example
/// a switch statement with multiple cases having the same destination).
BasicBlock *BasicBlock::getUniquePredecessor() {
pred_iterator PI = pred_begin(this), E = pred_end(this);
return;
for (unsigned i = 0, e = TI->getNumSuccessors(); i != e; ++i) {
BasicBlock *Succ = TI->getSuccessor(i);
- for (iterator II = Succ->begin(); PHINode *PN = dyn_cast<PHINode>(II);
- ++II) {
+ // N.B. Succ might not be a complete BasicBlock, so don't assume
+ // that it ends with a non-phi instruction.
+ for (iterator II = Succ->begin(), IE = Succ->end(); II != IE; ++II) {
+ PHINode *PN = dyn_cast<PHINode>(II);
+ if (!PN)
+ break;
int i;
while ((i = PN->getBasicBlockIndex(this)) >= 0)
PN->setIncomingBlock(i, New);