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Add a preverifier pass to check that every basic block ends in a terminator, so that we don't segfault when verifying invalid code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43578 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -71,7 +71,25 @@ namespace { // Anonymous namespace for class
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cl::opt<bool>
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Pedantic("verify-pedantic",
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cl::desc("Reject code with undefined behaviour"));
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struct VISIBILITY_HIDDEN PreVerifier : public FunctionPass {
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static char ID; // Pass ID, replacement for typeid
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PreVerifier() : FunctionPass((intptr_t)&ID) { }
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bool runOnFunction(Function &F) {
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for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I)
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assert(I->back().isTerminator()
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&& "Block does not end with a terminator?");
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return false;
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}
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};
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char PreVerifier::ID = 0;
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RegisterPass<PreVerifier> PreVer("preverify", "Preliminary module verification");
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const PassInfo *PreVerifyID = PreVer.getPassInfo();
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struct VISIBILITY_HIDDEN
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Verifier : public FunctionPass, InstVisitor<Verifier> {
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static char ID; // Pass ID, replacement for typeid
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@ -161,6 +179,7 @@ namespace { // Anonymous namespace for class
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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AU.addRequiredID(PreVerifyID);
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if (RealPass)
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AU.addRequired<DominatorTree>();
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}
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