diff options
| -rw-r--r-- | llvm/lib/Analysis/CaptureTracking.cpp | 3 | ||||
| -rw-r--r-- | llvm/lib/Analysis/MemoryDependenceAnalysis.cpp | 2 | ||||
| -rw-r--r-- | llvm/test/Transforms/GVN/rle.ll | 9 |
3 files changed, 13 insertions, 1 deletions
diff --git a/llvm/lib/Analysis/CaptureTracking.cpp b/llvm/lib/Analysis/CaptureTracking.cpp index 03bd70dfa34..9a7992e38d5 100644 --- a/llvm/lib/Analysis/CaptureTracking.cpp +++ b/llvm/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 diff --git a/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp b/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp index 128c7f93a4b..704e27b5ce6 100644 --- a/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp +++ b/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp @@ -375,7 +375,7 @@ MemoryDependenceAnalysis::getModRefInfo(const Instruction *Inst, // with a smarter AA in place, this test is just wasting compile time. if (!DT) return AliasAnalysis::ModRef; const Value *Object = GetUnderlyingObject(MemLoc.Ptr, TD); - if (!isIdentifiedObject(Object) || isa<GlobalVariable>(Object)) + if (!isIdentifiedObject(Object) || isa<GlobalValue>(Object)) return AliasAnalysis::ModRef; ImmutableCallSite CS(Inst); if (!CS.getInstruction()) return AliasAnalysis::ModRef; diff --git a/llvm/test/Transforms/GVN/rle.ll b/llvm/test/Transforms/GVN/rle.ll index 47ccd85d489..9e08004ea47 100644 --- a/llvm/test/Transforms/GVN/rle.ll +++ b/llvm/test/Transforms/GVN/rle.ll @@ -26,6 +26,15 @@ define i8 @crash0({i32, i32} %A, {i32, i32}* %P) { ret i8 %Y } +;; No PR filed, crashed in CaptureTracker. +declare void @helper() +define void @crash1() { + tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* undef, i8* undef, i64 undef, i32 1, i1 false) nounwind + %tmp = load i8* bitcast (void ()* @helper to i8*) + %x = icmp eq i8 %tmp, 15 + ret void +} + ;;===----------------------------------------------------------------------===;; ;; Store -> Load and Load -> Load forwarding where src and dst are different |
