Start function numbering at 0.

llvm-svn: 101638
diff --git a/llvm/lib/CodeGen/MachineFunctionAnalysis.cpp b/llvm/lib/CodeGen/MachineFunctionAnalysis.cpp
index 3b2eb6d..07a0f45 100644
--- a/llvm/lib/CodeGen/MachineFunctionAnalysis.cpp
+++ b/llvm/lib/CodeGen/MachineFunctionAnalysis.cpp
@@ -44,7 +44,8 @@
   MachineModuleInfo *MMI = getAnalysisIfAvailable<MachineModuleInfo>();
   assert(MMI && "MMI not around yet??");
   MMI->setModule(&M);
-  NextFnNum = 1; return false;
+  NextFnNum = 0;
+  return false;
 }