diff --git a/test/CodeGen/X86/legalizedag_vec.ll b/test/CodeGen/X86/legalizedag_vec.ll
new file mode 100644
index 00000000000..97654b201ba
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+++ b/test/CodeGen/X86/legalizedag_vec.ll
@@ -0,0 +1,15 @@
+; RUN: llvm-as < %s | llc -march=x86 -mattr=sse2 -disable-mmx -o %t -f
+; RUN: grep divdi3  %t | count 2
+
+
+; Test case for r63760 where we generate a legalization assert that an illegal
+; type has been inserted by LegalizeDAG after LegalizeType has run. With sse2,
+; v2i64 is a legal type but with mmx disabled, i64 is an illegal type. When
+; legalizing the divide in LegalizeDAG, we scalarize the vector divide and make
+; two 64 bit divide library calls which introduces i64 nodes that needs to be
+; promoted.
+
+define <2 x i64> @test_long_div(<2 x i64> %num, <2 x i64> %div) {
+  %div.r = sdiv <2 x i64> %num, %div
+  ret <2 x i64>  %div.r
+}                                     
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