Fix crasher in GVN due to my recent capture tracking changes.

[oota-llvm.git] / lib / Analysis / CaptureTracking.cpp

diff --git a/lib/Analysis/CaptureTracking.cpp b/lib/Analysis/CaptureTracking.cpp
index 03bd70dfa34a64e7ef81959b0d259e2f0c462545..9a7992e38d5a5e6e9a4a57cf81043ac4f88881c4 100644 (file)
--- a/lib/Analysis/CaptureTracking.cpp
+++ b/lib/Analysis/CaptureTracking.cpp
@@ -53,6 +53,9 @@ namespace {
 /// counts as capturing it or not.
 bool llvm::PointerMayBeCaptured(const Value *V,
                                 bool ReturnCaptures, bool StoreCaptures) {
+  assert(!isa<GlobalValue>(V) &&
+         "It doesn't make sense to ask whether a global is captured.");
+
   // TODO: If StoreCaptures is not true, we could do Fancy analysis
   // to determine whether this store is not actually an escape point.
   // In that case, BasicAliasAnalysis should be updated as well to