--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/llvm/test/Feature/OperandBundles/pr26510.ll	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,27 @@
+; RUN: opt -S -globals-aa -functionattrs < %s | FileCheck %s
+; RUN: opt -S -O3 < %s | FileCheck %s
+
+; Apart from checking for the direct cause of the bug, we also check
+; if any problematic aliasing rules have accidentally snuck into -O3.
+;
+; Since the "abc" operand bundle is not a special operand bundle that
+; LLVM knows about, all of the stores and loads in @test below have to
+; stay.
+
+declare void @foo() readnone
+
+; CHECK-LABEL: define i8* @test(i8* %p)
+; CHECK:   %a = alloca i8*, align 8
+; CHECK:   store i8* %p, i8** %a, align 8
+; CHECK:   call void @foo() [ "abc"(i8** %a) ]
+; CHECK:   %reload = load i8*, i8** %a, align 8
+; CHECK:   ret i8* %reload
+; CHECK: }
+
+define i8* @test(i8* %p) {
+  %a = alloca i8*, align 8
+  store i8* %p, i8** %a, align 8
+  call void @foo() ["abc" (i8** %a)]
+  %reload = load i8*, i8** %a, align 8
+  ret i8* %reload
+}