1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
index a8b69f8..221eeaa 100644
--- a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -1640,6 +1640,11 @@ static uint64_t getOptimizationFlags(const Value *V) {
   } else if (const auto *NNI = dyn_cast<PossiblyNonNegInst>(V)) {
     if (NNI->hasNonNeg())
       Flags |= 1 << bitc::PNNI_NON_NEG;
+  } else if (const auto *TI = dyn_cast<TruncInst>(V)) {
+    if (TI->hasNoSignedWrap())
+      Flags |= 1 << bitc::TIO_NO_SIGNED_WRAP;
+    if (TI->hasNoUnsignedWrap())
+      Flags |= 1 << bitc::TIO_NO_UNSIGNED_WRAP;
   }
 
   return Flags;