Add a new -no-output option, useful for -aa-eval tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5541 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/tools/opt/opt.cpp b/tools/opt/opt.cpp
index de56080c2c1602ff996b0b0d2fa183284f4aa710..9d0837c29d745d8f8058a1313ec5951e2d026902 100644 (file)
--- a/tools/opt/opt.cpp
+++ b/tools/opt/opt.cpp
@@ -47,6 +47,9 @@ Force("f", cl::desc("Overwrite output files"));
 static cl::opt<bool>
 PrintEachXForm("p", cl::desc("Print module after each transformation"));
 
+static cl::opt<bool>
+NoOutput("no-output", cl::desc("Do not write result bytecode file"), cl::Hidden);
+
 static cl::opt<bool>
 Quiet("q", cl::desc("Don't print 'program modified' message"));
 
@@ -128,7 +131,8 @@ int main(int argc, char **argv) {
   Passes.add(createVerifierPass());
 
   // Write bytecode out to disk or cout as the last step...
-  Passes.add(new WriteBytecodePass(Out, Out != &std::cout));
+  if (!NoOutput)
+    Passes.add(new WriteBytecodePass(Out, Out != &std::cout));
 
   // Now that we have all of the passes ready, run them.
   if (Passes.run(*M.get()) && !Quiet)