Buildbot Fix.

This method can be called with a '0' argument which checks the return
value. However, the method it calls doesn't expect '0' as a valid value. Call the
correct method when it's 0.

llvm-svn: 164735

1 files changed, 2 insertions, 1 deletions

diff --git a/llvm/include/llvm/Function.h b/llvm/include/llvm/Function.h
index 907b14f599f..fa6d0d3f5b2 100644
--- a/llvm/include/llvm/Function.h
+++ b/llvm/include/llvm/Function.h
@@ -278,7 +278,8 @@ public:
   /// @brief Determine if the parameter does not alias other parameters.
   /// @param n The parameter to check. 1 is the first parameter, 0 is the return
   bool doesNotAlias(unsigned n) const {
-    return getParamAttributes(n).hasNoAliasAttr();
+    return n != 0 ? getParamAttributes(n).hasNoAliasAttr() :
+      AttributeList.getRetAttributes().hasNoAliasAttr();
   }
   void setDoesNotAlias(unsigned n, bool DoesNotAlias = true) {
     if (DoesNotAlias) addAttribute(n, Attribute::NoAlias);