Tighten up the AnalysisUsage of lots of passes, primarily to correctly indicate whether or not they invalidate the CFGA

llvm-svn: 2386

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/Transforms/Scalar/ConstantProp.cpp b/llvm/lib/Transforms/Scalar/ConstantProp.cpp
index 0f1d0aea323..a8dbe3ff955 100644
--- a/llvm/lib/Transforms/Scalar/ConstantProp.cpp
+++ b/llvm/lib/Transforms/Scalar/ConstantProp.cpp
@@ -219,6 +219,12 @@ namespace {
       
       return Modified;
     }
+
+    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+      // FIXME: This pass does not preserve the CFG because it folds terminator
+      // instructions!
+      //AU.preservesCFG();
+    }
   };
 }