Add CHECKs and document PR11158.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142240 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/ARM/vrev.ll b/test/CodeGen/ARM/vrev.ll
index 5c3c0fca10d67d911956873f9a3d80bfc17359ed..e154334970b7d29802624529b8946806136eb5da 100644 (file)
--- a/test/CodeGen/ARM/vrev.ll
+++ b/test/CodeGen/ARM/vrev.ll
@@ -148,8 +148,13 @@ define void @test_with_vcombine(<4 x float>* %v) nounwind {
   ret void
 }
 
-; vrev <4 x i16> should use VREV32 and not VREV64
+; The type <2 x i16> is legalized to <2 x i32> and need to be trunc-stored
+; to <2 x i16> when stored to memory. Currently ARM scalarizes these stores.
+; See PR 11158
 define void @test_vrev64(<4 x i16>* nocapture %source, <2 x i16>* nocapture %dst) nounwind ssp {
+; CHECK: test_vrev64:
+; CHECK: vst1.16
+; CHECK: vst1.16
 entry:
   %0 = bitcast <4 x i16>* %source to <8 x i16>*
   %tmp2 = load <8 x i16>* %0, align 4