diff --git a/lib/Target/X86/X86InstrSSE.td b/lib/Target/X86/X86InstrSSE.td
index 228cf48a0a1..67cc72f3f0a 100644
--- a/lib/Target/X86/X86InstrSSE.td
+++ b/lib/Target/X86/X86InstrSSE.td
@@ -180,6 +180,12 @@ def : Pat<(v4f32 (scalar_to_vector FR32:$src)),
 // Implicitly promote a 64-bit scalar to a vector.
 def : Pat<(v2f64 (scalar_to_vector FR64:$src)),
           (INSERT_SUBREG (v2f64 (IMPLICIT_DEF)), FR64:$src, sub_sd)>;
+// Implicitly promote a 32-bit scalar to a vector.
+def : Pat<(v8f32 (scalar_to_vector FR32:$src)),
+          (INSERT_SUBREG (v8f32 (IMPLICIT_DEF)), FR32:$src, sub_ss)>;
+// Implicitly promote a 64-bit scalar to a vector.
+def : Pat<(v4f64 (scalar_to_vector FR64:$src)),
+          (INSERT_SUBREG (v4f64 (IMPLICIT_DEF)), FR64:$src, sub_sd)>;
 
 let AddedComplexity = 20 in {
 // MOVSSrm zeros the high parts of the register; represent this