From 9fb6cf1d82617994cd6dad33ecd45c1e913534aa Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Fri, 9 Jul 2004 16:44:37 +0000 Subject: [PATCH] Add checks to ensure that there are no unreachable blocks in the function git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14725 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/LiveVariables.cpp | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/lib/CodeGen/LiveVariables.cpp b/lib/CodeGen/LiveVariables.cpp index cc924c3cc44..d26848cb1c6 100644 --- a/lib/CodeGen/LiveVariables.cpp +++ b/lib/CodeGen/LiveVariables.cpp @@ -291,6 +291,14 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &MF) { 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; } -- 2.34.1