1 files changed, 32 insertions, 0 deletions
diff --git a/llvm/test/Transforms/DeadStoreElimination/2016-07-17-UseAfterFree.ll b/llvm/test/Transforms/DeadStoreElimination/2016-07-17-UseAfterFree.ll
new file mode 100644
index 00000000000..90629a263f7
--- /dev/null
+++ b/llvm/test/Transforms/DeadStoreElimination/2016-07-17-UseAfterFree.ll
@@ -0,0 +1,32 @@
+; RUN: opt < %s -basicaa -dse -S -enable-dse-partial-overwrite-tracking | FileCheck %s
+; PR28588
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+; Function Attrs: nounwind
+define void @_UPT_destroy(i8* nocapture %ptr) local_unnamed_addr #0 {
+entry:
+  %edi = getelementptr inbounds i8, i8* %ptr, i64 8
+
+; CHECK-NOT: tail call void @llvm.memset.p0i8.i64(i8* align 8 %edi, i8 0, i64 176, i1 false)
+; CHECK-NOT: store i32 -1, i32* %addr
+
+  tail call void @llvm.memset.p0i8.i64(i8* align 8 %edi, i8 0, i64 176, i1 false)
+  %format4.i = getelementptr inbounds i8, i8* %ptr, i64 144
+  %addr = bitcast i8* %format4.i to i32*
+  store i32 -1, i32* %addr, align 8
+
+; CHECK: tail call void @free
+  tail call void @free(i8* nonnull %ptr)
+  ret void
+}
+
+; Function Attrs: nounwind
+declare void @free(i8* nocapture) local_unnamed_addr #0
+
+; Function Attrs: argmemonly nounwind
+declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i1) #1
+
+attributes #0 = { nounwind }
+attributes #1 = { argmemonly nounwind }