detect invalid combination of sret and byval

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39971 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/VMCore/Verifier.cpp b/lib/VMCore/Verifier.cpp
index a40d197aa29ceb4b077e968a208a40e7d4b4d804..cbb34f09e46dd0063a1bb555244e6741ad867500 100644 (file)
--- a/lib/VMCore/Verifier.cpp
+++ b/lib/VMCore/Verifier.cpp
@@ -377,6 +377,10 @@ void Verifier::visitFunction(Function &F) {
       if (Attrs->paramHasAttr(Idx, ParamAttr::ByVal)) {
         Assert1(isa<PointerType>(FT->getParamType(Idx-1)),
                 "Attribute ByVal should only apply to pointer to structs!", &F);
+
+        Assert1(!Attrs->paramHasAttr(Idx, ParamAttr::StructRet),
+                "Attributes ByVal and StructRet are incompatible!", &F);
+
         const PointerType *Ty =
             cast<PointerType>(FT->getParamType(Idx-1));
         Assert1(isa<StructType>(Ty->getElementType()),