1 files changed, 10 insertions, 0 deletions
diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
index debb530..cba5680 100644
--- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -3601,6 +3601,16 @@ Error BitcodeReader::parseFunctionRecord(ArrayRef<uint64_t> Record) {
     }
   }
 
+  if (Func->getCallingConv() == CallingConv::X86_INTR &&
+      !Func->arg_empty() && !Func->hasParamAttribute(0, Attribute::ByVal)) {
+    unsigned ParamTypeID = getContainedTypeID(FTyID, 1);
+    Type *ByValTy = getPtrElementTypeByID(ParamTypeID);
+    if (!ByValTy)
+      return error("Missing param element type for x86_intrcc upgrade");
+    Attribute NewAttr = Attribute::getWithByValType(Context, ByValTy);
+    Func->addParamAttr(0, NewAttr);
+  }
+
   MaybeAlign Alignment;
   if (Error Err = parseAlignmentValue(Record[5], Alignment))
     return Err;