Revert "Verify SIL modules at the beginning and at the end of the SIL optimization pipelines, if -sil-verify-all is provided"

This reverts commit r31863, which was committed by mistake.

Swift SVN r31864

tools/sil-opt/SILOpt.cpp

@@ -150,6 +150,9 @@ static llvm::cl::opt<unsigned>
 ASTVerifierProcessId("ast-verifier-process-id", llvm::cl::Hidden,
                      llvm::cl::init(1));
 
+static llvm::cl::opt<bool>
+PerformWMO("wmo", llvm::cl::desc("Enable whole-module optimizations"));
+
 static void runCommandLineSelectedPasses(SILModule *Module) {
   SILPassManager PM(Module);
 
@@ -253,8 +256,20 @@ int main(int argc, char **argv) {
   PrintingDiagnosticConsumer PrintDiags;
   CI.addDiagnosticConsumer(&PrintDiags);
 
+  if (!PerformWMO) {
+    auto &FrontendOpts = Invocation.getFrontendOptions();
+    if (!InputFilename.empty() && InputFilename != "-") {
+      FrontendOpts.PrimaryInput = SelectedInput(
+          FrontendOpts.InputFilenames.size());
+    } else {
+      FrontendOpts.PrimaryInput = SelectedInput(
+          FrontendOpts.InputBuffers.size(), SelectedInput::InputKind::Buffer);
+    }
+  }
+
   if (CI.setup(Invocation))
     return 1;
+
   CI.performSema();
 
   // If parsing produced an error, don't run any passes.