I noticed that the trampoline straightening transformation could

drop attributes on varargs call arguments.  Also, it could generate
invalid IR if the transformed call already had the 'nest' attribute
somewhere (this can never happen for code coming from llvm-gcc,
but it's a theoretical possibility).  Fix both problems.

llvm-svn: 45973

1 files changed, 7 insertions, 0 deletions

diff --git a/llvm/lib/VMCore/ParameterAttributes.cpp b/llvm/lib/VMCore/ParameterAttributes.cpp
index b48e0cecde3..4b63cfb2da7 100644
--- a/llvm/lib/VMCore/ParameterAttributes.cpp
+++ b/llvm/lib/VMCore/ParameterAttributes.cpp
@@ -36,6 +36,13 @@ ParamAttrsList::getParamAttrs(uint16_t Index) const {
   return ParamAttr::None;
 }
 
+bool ParamAttrsList::hasAttrSomewhere(ParameterAttributes attr) const {
+  for (unsigned i = 0, e = attrs.size(); i < e; ++i)
+    if (attrs[i].attrs & attr)
+      return true;
+  return false;
+}
+
 std::string 
 ParamAttrsList::getParamAttrsText(uint16_t Attrs) {
   std::string Result;