diff --git a/llvm/lib/Target/X86/X86InstrSSE.td b/llvm/lib/Target/X86/X86InstrSSE.td
index 9c20e8427115..e9bfbeb0b631 100644
--- a/llvm/lib/Target/X86/X86InstrSSE.td
+++ b/llvm/lib/Target/X86/X86InstrSSE.td
@@ -2201,6 +2201,10 @@ let neverHasSideEffects = 1 in
 def MOVDQArr : PDI<0x6F, MRMSrcReg, (outs VR128:$dst), (ins VR128:$src),
                    "movdqa\t{$src, $dst|$dst, $src}", []>;
 
+def MOVDQUrr :   I<0x6F, MRMSrcReg, (outs VR128:$dst), (ins VR128:$src),
+                   "movdqu\t{$src, $dst|$dst, $src}",
+                   []>, XS, Requires<[HasSSE2]>;
+
 let canFoldAsLoad = 1, mayLoad = 1 in {
 def MOVDQArm : PDI<0x6F, MRMSrcMem, (outs VR128:$dst), (ins i128mem:$src),
                    "movdqa\t{$src, $dst|$dst, $src}",
diff --git a/llvm/test/MC/X86/x86-64.s b/llvm/test/MC/X86/x86-64.s
index 2eb2aded6ac8..ed3162c0a98a 100644
--- a/llvm/test/MC/X86/x86-64.s
+++ b/llvm/test/MC/X86/x86-64.s
@@ -924,3 +924,5 @@ data16 // CHECK: data16 # encoding: [0x66]
 // PR8855
 movq 18446744073709551615,%rbx   // CHECK: movq	-1, %rbx
 
+// PR8946
+movdqu	%xmm0, %xmm1 // CHECK: movdqu	%xmm0, %xmm1 # encoding: [0xf3,0x0f,0x6f,0xc8]