X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=lib%2FAnalysis%2FBasicAliasAnalysis.cpp;h=ace596dc5f6268b3f784b9a2780f62497612b501;hp=00f346ea115db035feada4c618acd13b078477fc;hb=719759b2faa42655f5dc28091ca6faf90b262561;hpb=f5d467572cb0ac0b80696330ed9d220dc1431bb5

diff --git a/lib/Analysis/BasicAliasAnalysis.cpp b/lib/Analysis/BasicAliasAnalysis.cpp
index 00f346ea115..ace596dc5f6 100644
--- a/lib/Analysis/BasicAliasAnalysis.cpp
+++ b/lib/Analysis/BasicAliasAnalysis.cpp
@@ -599,9 +599,11 @@ ModRefInfo BasicAAResult::getArgModRefInfo(ImmutableCallSite CS,
     case Intrinsic::memset:
     case Intrinsic::memcpy:
     case Intrinsic::memmove:
-      assert((ArgIdx == 0 || ArgIdx == 1) &&
-             "Invalid argument index for memory intrinsic");
-      return ArgIdx ? MRI_Ref : MRI_Mod;
+      // We don't currently have a writeonly attribute.  All other properties
+      // of these intrinsics are nicely described via attributes in
+      // Intrinsics.td and handled generically below.
+      if (ArgIdx == 0)
+        return MRI_Mod;
     }
 
   // We can bound the aliasing properties of memset_pattern16 just as we can