Taken into account Duncan's comments for r149481 dated by 2nd Feb 2012:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20120130/136146.html
Implemented CaseIterator and it solves almost all described issues: we don't need to mix operand/case/successor indexing anymore. Base iterator class is implemented as a template since it may be initialized either from "const SwitchInst*" or from "SwitchInst*".
ConstCaseIt is just a read-only iterator.
CaseIt is read-write iterator; it allows to change case successor and case value.
Usage of iterator allows totally remove resolveXXXX methods. All indexing convertions done automatically inside the iterator's getters.
Main way of iterator usage looks like this:
SwitchInst *SI = ... // intialize it somehow
for (SwitchInst::CaseIt i = SI->caseBegin(), e = SI->caseEnd(); i != e; ++i) {
BasicBlock *BB = i.getCaseSuccessor();
ConstantInt *V = i.getCaseValue();
// Do something.
}
If you want to convert case number to TerminatorInst successor index, just use getSuccessorIndex iterator's method.
If you want initialize iterator from TerminatorInst successor index, use CaseIt::fromSuccessorIndex(...) method.
There are also related changes in llvm-clients: klee and clang.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@152298 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGCleanup.cpp b/lib/CodeGen/CGCleanup.cpp
index f586230..15a4f05 100644
--- a/lib/CodeGen/CGCleanup.cpp
+++ b/lib/CodeGen/CGCleanup.cpp
@@ -504,7 +504,7 @@
llvm::SwitchInst *si = cast<llvm::SwitchInst>(use.getUser());
if (si->getNumCases() == 1 && si->getDefaultDest() == unreachableBB) {
// Replace the switch with a branch.
- llvm::BranchInst::Create(si->getCaseSuccessor(0), si);
+ llvm::BranchInst::Create(si->caseBegin().getCaseSuccessor(), si);
// The switch operand is a load from the cleanup-dest alloca.
llvm::LoadInst *condition = cast<llvm::LoadInst>(si->getCondition());
