Add checks to ensure that there are no unreachable blocks in the function
llvm-svn: 14725
diff --git a/llvm/lib/CodeGen/LiveVariables.cpp b/llvm/lib/CodeGen/LiveVariables.cpp
index cc924c3..d26848c 100644
--- a/llvm/lib/CodeGen/LiveVariables.cpp
+++ b/llvm/lib/CodeGen/LiveVariables.cpp
@@ -291,6 +291,14 @@
i + MRegisterInfo::FirstVirtualRegister));
}
+ // Check to make sure there are no unreachable blocks in the MC CFG for the
+ // function. If so, it is due to a bug in the instruction selector or some
+ // other part of the code generator if this happens.
+#ifndef NDEBUG
+ for(MachineFunction::iterator i = MF.begin(), e = MF.end(); i != e; ++i)
+ assert(Visited.count(&*i) != 0 && "unreachable basic block found");
+#endif
+
return false;
}