Skip constants

Author: goldsteinn

llvm/lib/Transforms/Utils/InlineFunction.cpp

@@ -60,6 +60,7 @@
 #include "llvm/IR/MDBuilder.h"
 #include "llvm/IR/Metadata.h"
 #include "llvm/IR/Module.h"
+#include "llvm/IR/PatternMatch.h"
 #include "llvm/IR/ProfDataUtils.h"
 #include "llvm/IR/Type.h"
 #include "llvm/IR/User.h"
@@ -1418,6 +1419,11 @@ static void AddParamAndFnBasicAttributes(const CallBase &CB,
         if (AL.hasParamAttr(I, Attribute::ByVal))
           continue;
 
+        // Don't both propagating attrs to constants.
+        if (match(NewInnerCB->getArgOperand(I),
+                  llvm::PatternMatch::m_ImmConstant()))
+          continue;
+
         // Check if the underlying value for the parameter is an argument.
         const Argument *Arg = dyn_cast<Argument>(InnerCB->getArgOperand(I));
         unsigned ArgNo;