Range-for some stuff related to RegClasses, and comment cases where range-for isn't suitable.

llvm-svn: 223260

1 files changed, 4 insertions, 6 deletions

diff --git a/llvm/utils/TableGen/DAGISelMatcherGen.cpp b/llvm/utils/TableGen/DAGISelMatcherGen.cpp
index 4a73b003598..47d3b647156 100644
--- a/llvm/utils/TableGen/DAGISelMatcherGen.cpp
+++ b/llvm/utils/TableGen/DAGISelMatcherGen.cpp
@@ -27,21 +27,19 @@ static MVT::SimpleValueType getRegisterValueType(Record *R,
   bool FoundRC = false;
   MVT::SimpleValueType VT = MVT::Other;
   const CodeGenRegister *Reg = T.getRegBank().getReg(R);
-  ArrayRef<CodeGenRegisterClass*> RCs = T.getRegBank().getRegClasses();
 
-  for (unsigned rc = 0, e = RCs.size(); rc != e; ++rc) {
-    const CodeGenRegisterClass &RC = *RCs[rc];
-    if (!RC.contains(Reg))
+  for (const auto *RC : T.getRegBank().getRegClasses()) {
+    if (!RC->contains(Reg))
       continue;
 
     if (!FoundRC) {
       FoundRC = true;
-      VT = RC.getValueTypeNum(0);
+      VT = RC->getValueTypeNum(0);
       continue;
     }
 
     // If this occurs in multiple register classes, they all have to agree.
-    assert(VT == RC.getValueTypeNum(0));
+    assert(VT == RC->getValueTypeNum(0));
   }
   return VT;
 }