getFirstInsertionPt() returns an iterator to the first insertion point in a
basic block. This is after all PHIs and any other instruction which is required
to be at the top of the basic block (like LandingPadInst).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137744
91177308-0d34-0410-b5e6-
96231b3b80d8
return const_cast<BasicBlock*>(this)->getFirstNonPHIOrDbgOrLifetime();
}
+ /// getFirstInsertionPt - Returns an iterator to the first instruction in this
+ /// block that is suitable for inserting a non-PHI instruction. In particular,
+ /// it skips all PHIs and LandingPad instructions. Returns 0 if there are no
+ /// non-PHI instructions.
+ iterator getFirstInsertionPt();
+ const_iterator getFirstInsertionPt() const {
+ return const_cast<BasicBlock*>(this)->getFirstInsertionPt();
+ }
+
/// removeFromParent - This method unlinks 'this' from the containing
/// function, but does not delete it.
///
return &*i;
}
+BasicBlock::iterator BasicBlock::getFirstInsertionPt() {
+ iterator InsertPt = getFirstNonPHI();
+ if (isa<LandingPadInst>(InsertPt)) ++InsertPt;
+ return InsertPt;
+}
+
void BasicBlock::dropAllReferences() {
for(iterator I = begin(), E = end(); I != E; ++I)
I->dropAllReferences();