--- /dev/null
+; RUN: opt < %s -reassociate -S
+
+; PR28367
+
+; Check to make sure this test does not assert or segfault. If we get too
+; aggressive with retrying instructions it's possible to invalidate our
+; iterator. See PR28367 for complete details.
+
+define void @fn1(i32 %a, i1 %c, i32* %ptr) {
+entry:
+ br label %for.cond
+
+for.cond:
+ %d.0 = phi i32 [ 1, %entry ], [ 2, %for.body ]
+ br i1 %c, label %for.end, label %for.body
+
+for.body:
+ %sub1 = sub i32 %a, %d.0
+ %dead1 = add i32 %sub1, 1
+ %dead2 = mul i32 %dead1, 3
+ %dead3 = mul i32 %dead2, %sub1
+ %sub2 = sub nsw i32 0, %d.0
+ store i32 %sub2, i32* %ptr, align 4
+ br label %for.cond
+
+for.end:
+ ret void
+}