Unbreak build with gcc 4.3: provide missed includes and silence most annoying warnings.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47367 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index 7f1cac0..30cf950 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -2145,13 +2145,14 @@
   Instruction *I = dyn_cast<Instruction>(V);
   if (I == 0 || !L->contains(I->getParent())) return 0;
 
-  if (PHINode *PN = dyn_cast<PHINode>(I))
+  if (PHINode *PN = dyn_cast<PHINode>(I)) {
     if (L->getHeader() == I->getParent())
       return PN;
     else
       // We don't currently keep track of the control flow needed to evaluate
       // PHIs, so we cannot handle PHIs inside of loops.
       return 0;
+  }
 
   // If we won't be able to constant fold this expression even if the operands
   // are constants, return early.