diff --git a/test/CodeGen/X86/vec_partial.ll b/test/CodeGen/X86/vec_partial.ll
new file mode 100644
index 00000000000..709f326e502
--- /dev/null
+++ b/test/CodeGen/X86/vec_partial.ll
@@ -0,0 +1,32 @@
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s
+
+; PR11580
+define <3 x float> @addf3(<3 x float> %x) {
+; CHECK-LABEL: addf3
+; CHECK:       # BB#0:
+; CHECK-NEXT:  addps .LCPI0_0(%rip), %xmm0
+; CHECK-NEXT:  retq
+entry:
+  %add = fadd <3 x float> %x, <float 1.000000e+00, float 1.000000e+00, float 1.000000e+00>
+  ret <3 x float> %add
+}
+
+; PR11580
+define <4 x float> @cvtf3_f4(<3 x float> %x) {
+; CHECK-LABEL: cvtf3_f4
+; CHECK:       # BB#0:
+; CHECK-NEXT:  retq
+entry:
+  %extractVec = shufflevector <3 x float> %x, <3 x float> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 undef>
+  ret <4 x float> %extractVec
+}
+
+; PR11580
+define <3 x float> @cvtf4_f3(<4 x float> %x) {
+; CHECK-LABEL: cvtf4_f3
+; CHECK:       # BB#0:
+; CHECK-NEXT:  retq
+entry:
+  %extractVec = shufflevector <4 x float> %x, <4 x float> undef, <3 x i32> <i32 0, i32 1, i32 2>
+  ret <3 x float> %extractVec
+}