--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/llvm/test/Transforms/LoopUnroll/disable-loop-unrolling_forced.ll	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,30 @@
+; RUN: opt -disable-loop-unrolling -O1 -S < %s | FileCheck %s
+;
+; Check loop unrolling metadata is honored despite automatic unrolling
+; being disabled in the pass builder.
+;
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+
+; CHECK-LABEL: @forced(
+; CHECK: load
+; CHECK: load
+define void @forced(i32* nocapture %a) {
+entry:
+  br label %for.body
+
+for.body:
+  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
+  %arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
+  %0 = load i32, i32* %arrayidx, align 4
+  %inc = add nsw i32 %0, 1
+  store i32 %inc, i32* %arrayidx, align 4
+  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+  %exitcond = icmp eq i64 %indvars.iv.next, 64
+  br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !0
+
+for.end:
+  ret void
+}
+
+!0 = distinct !{!0, !{!"llvm.loop.unroll.enable"},
+                    !{!"llvm.loop.unroll.count", i32 2}}