DAE bug fix. Don't lose parameter attributes on vararg arguments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46113 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/IPO/DeadArgumentElimination.cpp b/lib/Transforms/IPO/DeadArgumentElimination.cpp
index b877012..3a4c36f 100644
--- a/lib/Transforms/IPO/DeadArgumentElimination.cpp
+++ b/lib/Transforms/IPO/DeadArgumentElimination.cpp
@@ -590,15 +590,19 @@
ParamAttrsVec.push_back(ParamAttrsWithIndex::get(Args.size(), Attrs));
}
- // Reconstruct the ParamAttrsList based on the vector we constructed.
- PAL = ParamAttrsList::get(ParamAttrsVec);
-
if (ExtraArgHack)
Args.push_back(UndefValue::get(Type::Int32Ty));
- // Push any varargs arguments on the list
- for (; AI != CS.arg_end(); ++AI)
+ // Push any varargs arguments on the list. Don't forget their attributes.
+ for (; AI != CS.arg_end(); ++AI) {
Args.push_back(*AI);
+ uint16_t Attrs = PAL ? PAL->getParamAttrs(index++) : 0;
+ if (Attrs)
+ ParamAttrsVec.push_back(ParamAttrsWithIndex::get(Args.size(), Attrs));
+ }
+
+ // Reconstruct the ParamAttrsList based on the vector we constructed.
+ PAL = ParamAttrsList::get(ParamAttrsVec);
Instruction *New;
if (InvokeInst *II = dyn_cast<InvokeInst>(Call)) {