Use 'static const char' instead of 'static const int'.

Due to darwin gcc bug, one version of darwin linker coalesces
static const int, which defauts PassID based pass identification.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36652 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/LoopRotation.cpp

@@ -44,7 +44,7 @@ namespace {
   class VISIBILITY_HIDDEN LoopRotate : public LoopPass {
 
   public:
-    static const int ID; // Pass ID, replacement for typeid
+    static const char ID; // Pass ID, replacement for typeid
     LoopRotate() : LoopPass((intptr_t)&ID) {}
 
     // Rotate Loop L as many times as possible. Return true if
@@ -94,7 +94,7 @@ namespace {
     SmallVector<RenameData, MAX_HEADER_SIZE> LoopHeaderInfo;
   };
   
-  const int LoopRotate::ID = 0;
+  const char LoopRotate::ID = 0;
   RegisterPass<LoopRotate> X ("loop-rotate", "Rotate Loops");
 }