Add an assertion if find_leader fails.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38477 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Scalar/GVNPRE.cpp b/lib/Transforms/Scalar/GVNPRE.cpp
index 73739c161a978b398fff7002b7c694470f268081..4a5dca940988a3e0b13d362fdbc8ab984903e49b 100644 (file)
--- a/lib/Transforms/Scalar/GVNPRE.cpp
+++ b/lib/Transforms/Scalar/GVNPRE.cpp
@@ -695,6 +695,7 @@ Value* GVNPRE::find_leader(ValueNumberedSet& vals, uint32_t v) {
     if (v == VN.lookup(*I))
       return *I;
   
+  assert(0 && "No leader found, but present bit is set?");
   return 0;
 }