diff --git a/test/Assembler/upgrade-loop-metadata.ll b/test/Assembler/upgrade-loop-metadata.ll
new file mode 100644
index 00000000000..f664bdf476a
--- /dev/null
+++ b/test/Assembler/upgrade-loop-metadata.ll
@@ -0,0 +1,41 @@
+; Test to make sure loop vectorizer metadata is automatically upgraded.
+;
+; Run using opt as well to ensure that the metadata is upgraded when parsing
+; assembly.
+;
+; RUN: llvm-as < %s | llvm-dis | FileCheck %s
+; RUN: opt -S < %s | FileCheck %s
+
+define void @_Z28loop_with_vectorize_metadatav() {
+entry:
+  %i = alloca i32, align 4
+  store i32 0, i32* %i, align 4
+  br label %for.cond
+
+for.cond:                                         ; preds = %for.inc, %entry
+  %0 = load i32* %i, align 4
+  %cmp = icmp slt i32 %0, 16
+  br i1 %cmp, label %for.body, label %for.end, !llvm.loop !1
+
+for.body:                                         ; preds = %for.cond
+  br label %for.inc
+
+for.inc:                                          ; preds = %for.body
+  %1 = load i32* %i, align 4
+  %inc = add nsw i32 %1, 1
+  store i32 %inc, i32* %i, align 4
+  br label %for.cond
+
+for.end:                                          ; preds = %for.cond
+  ret void
+}
+
+; CHECK: !{metadata !"llvm.loop.vectorize.unroll", i32 4}
+; CHECK: !{metadata !"llvm.loop.vectorize.width", i32 8}
+; CHECK: !{metadata !"llvm.loop.vectorize.enable", i1 true}
+
+!0 = metadata !{metadata !"clang version 3.5.0 (trunk 211528)"}
+!1 = metadata !{metadata !1, metadata !2, metadata !3, metadata !4, metadata !4}
+!2 = metadata !{metadata !"llvm.vectorizer.unroll", i32 4}
+!3 = metadata !{metadata !"llvm.vectorizer.width", i32 8}
+!4 = metadata !{metadata !"llvm.vectorizer.enable", i1 true}
diff --git a/test/Bitcode/upgrade-loop-metadata.ll b/test/Bitcode/upgrade-loop-metadata.ll
new file mode 100644
index 00000000000..1a45056d397
--- /dev/null
+++ b/test/Bitcode/upgrade-loop-metadata.ll
@@ -0,0 +1,37 @@
+; Test to make sure loop vectorizer metadata is automatically upgraded.
+;
+; RUN: llvm-dis < %s.bc | FileCheck %s
+
+define void @_Z28loop_with_vectorize_metadatav() {
+entry:
+  %i = alloca i32, align 4
+  store i32 0, i32* %i, align 4
+  br label %for.cond
+
+for.cond:                                         ; preds = %for.inc, %entry
+  %0 = load i32* %i, align 4
+  %cmp = icmp slt i32 %0, 16
+  br i1 %cmp, label %for.body, label %for.end, !llvm.loop !1
+
+for.body:                                         ; preds = %for.cond
+  br label %for.inc
+
+for.inc:                                          ; preds = %for.body
+  %1 = load i32* %i, align 4
+  %inc = add nsw i32 %1, 1
+  store i32 %inc, i32* %i, align 4
+  br label %for.cond
+
+for.end:                                          ; preds = %for.cond
+  ret void
+}
+
+; CHECK: !{metadata !"llvm.loop.vectorize.unroll", i32 4}
+; CHECK: !{metadata !"llvm.loop.vectorize.width", i32 8}
+; CHECK: !{metadata !"llvm.loop.vectorize.enable", i1 true}
+
+!0 = metadata !{metadata !"clang version 3.5.0 (trunk 211528)"}
+!1 = metadata !{metadata !1, metadata !2, metadata !3, metadata !4, metadata !4}
+!2 = metadata !{metadata !"llvm.vectorizer.unroll", i32 4}
+!3 = metadata !{metadata !"llvm.vectorizer.width", i32 8}
+!4 = metadata !{metadata !"llvm.vectorizer.enable", i1 true}
diff --git a/test/Bitcode/upgrade-loop-metadata.ll.bc b/test/Bitcode/upgrade-loop-metadata.ll.bc
new file mode 100644
index 00000000000..3f218cb7feb
Binary files /dev/null and b/test/Bitcode/upgrade-loop-metadata.ll.bc differ