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-rw-r--r--llvm_mode/compare-transform-pass.so.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm_mode/compare-transform-pass.so.cc b/llvm_mode/compare-transform-pass.so.cc
index e1332a9d..94b256f7 100644
--- a/llvm_mode/compare-transform-pass.so.cc
+++ b/llvm_mode/compare-transform-pass.so.cc
@@ -496,7 +496,7 @@ bool CompareTransform::transformCmps(Module &M, const bool processStrcmp,
 
 bool CompareTransform::runOnModule(Module &M) {
 
-  if (getenv("AFL_QUIET") == NULL)
+  if (isatty(2) && getenv("AFL_QUIET") == NULL)
     llvm::errs() << "Running compare-transform-pass by laf.intel@gmail.com, "
                     "extended by heiko@hexco.de\n";
   transformCmps(M, true, true, true, true, true);