Update callCapturesBefore() for new CaptureTracking logic

Author: nikic

llvm/lib/Analysis/AliasAnalysis.cpp

@@ -636,7 +636,13 @@ ModRefInfo AAResults::callCapturesBefore(const Instruction *I,
     // Only look at the no-capture or byval pointer arguments.  If this
     // pointer were passed to arguments that were neither of these, then it
     // couldn't be no-capture.
-    if (!(*CI)->getType()->isPointerTy() || !Call->doesNotCapture(ArgNo))
+    if (!(*CI)->getType()->isPointerTy())
+      continue;
+
+    // Make sure we still check captures(ret: address, provenance) arguments,
+    // as these wouldn't be treated as a capture at the call-site.
+    CaptureInfo Captures = Call->getCaptureInfo(ArgNo);
+    if (!capturesNothing(Captures.getOtherComponents()))
       continue;
 
     AliasResult AR =