Let libcall semantics decide whether it knows about functions 
with definitions or not.

llvm-svn: 52028
diff --git a/llvm/lib/Analysis/LibCallAliasAnalysis.cpp b/llvm/lib/Analysis/LibCallAliasAnalysis.cpp
index 6c8472b..afc60dd 100644
--- a/llvm/lib/Analysis/LibCallAliasAnalysis.cpp
+++ b/llvm/lib/Analysis/LibCallAliasAnalysis.cpp
@@ -155,8 +155,8 @@
   
   // If this is a direct call to a function that LCI knows about, get the
   // information about the runtime function.
-  if (Function *F = CS.getCalledFunction()) {
-    if (LCI && F->isDeclaration()) {
+  if (LCI) {
+    if (Function *F = CS.getCalledFunction()) {
       if (const LibCallFunctionInfo *FI = LCI->getFunctionInfo(F)) {
         MRInfo = ModRefResult(MRInfo & AnalyzeLibCallDetails(FI, CS, P, Size));
         if (MRInfo == NoModRef) return NoModRef;