[IR] Redesign the case iterator in SwitchInst to actually be an iterator

and to expose a handle to represent the actual case rather than having
the iterator return a reference to itself.

All of this allows the iterator to be used with common STL facilities,
standard algorithms, etc.

Doing this exposed some missing facilities in the iterator facade that
I've fixed and required some work to the actual iterator to fully
support the necessary API.

Differential Revision: https://reviews.llvm.org/D31548

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300032 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/ExecutionEngine/Interpreter/Execution.cpp b/lib/ExecutionEngine/Interpreter/Execution.cpp
index 923f6e7147d..e29e9fc2c70 100644
--- a/lib/ExecutionEngine/Interpreter/Execution.cpp
+++ b/lib/ExecutionEngine/Interpreter/Execution.cpp
@@ -899,10 +899,10 @@ void Interpreter::visitSwitchInst(SwitchInst &I) {
 
   // Check to see if any of the cases match...
   BasicBlock *Dest = nullptr;
-  for (SwitchInst::CaseIt i = I.case_begin(), e = I.case_end(); i != e; ++i) {
-    GenericValue CaseVal = getOperandValue(i.getCaseValue(), SF);
+  for (auto Case : I.cases()) {
+    GenericValue CaseVal = getOperandValue(Case.getCaseValue(), SF);
     if (executeICMP_EQ(CondVal, CaseVal, ElTy).IntVal != 0) {
-      Dest = cast<BasicBlock>(i.getCaseSuccessor());
+      Dest = cast<BasicBlock>(Case.getCaseSuccessor());
       break;
     }
   }