Use setPreservesAll and setPreservesCFG in CodeGen passes.

llvm-svn: 77754
diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index e19631f..ebc4b24 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -169,6 +169,7 @@
 }
 
 void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
+  AU.setPreservesAll();
   MachineFunctionPass::getAnalysisUsage(AU);
   AU.addRequired<GCModuleInfo>();
 }