Run the CFG simplification pass even when optimization is disabled.

This fixes an issue with undefined SVML symbols with code that called
transcendental functions in the stdandard library, even when the SVML
math library hadn't been selected.

opt.cpp

@@ -204,6 +204,7 @@ Optimize(llvm::Module *module, int optLevel) {
         optPM.add(CreateIsCompileTimeConstantPass(true));
         optPM.add(llvm::createFunctionInliningPass());
         optPM.add(CreateMakeInternalFuncsStaticPass());
+        optPM.add(llvm::createCFGSimplificationPass());
         optPM.add(llvm::createGlobalDCEPass());
     }
     else {