[X86] Add test case for trunc_packus_v16i32_v16i8_store to min-legal-vector-width.ll

We aren't folding the vpmovuswb into the store.

llvm-svn: 374507

diff --git a/llvm/test/CodeGen/X86/min-legal-vector-width.ll b/llvm/test/CodeGen/X86/min-legal-vector-width.ll
index 91ece95..95e6d3e 100644 (file)
--- a/llvm/test/CodeGen/X86/min-legal-vector-width.ll
+++ b/llvm/test/CodeGen/X86/min-legal-vector-width.ll
@@ -1080,7 +1080,7 @@ define void @vselect_split_v16i16_setcc(<16 x i16> %s, <16 x i16> %t, <16 x i32>
   ret void
 }
 
-define <16 x i8> @trunc_packus_v16i32_v16i8(<16 x i32>* %p, <16 x i8>* %q) "min-legal-vector-width"="256" {
+define <16 x i8> @trunc_packus_v16i32_v16i8(<16 x i32>* %p) "min-legal-vector-width"="256" {
 ; CHECK-LABEL: trunc_packus_v16i32_v16i8:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    vmovdqa (%rdi), %ymm0
@@ -1098,6 +1098,26 @@ define <16 x i8> @trunc_packus_v16i32_v16i8(<16 x i32>* %p, <16 x i8>* %q) "min-
   ret <16 x i8> %f
 }
 
+define void @trunc_packus_v16i32_v16i8_store(<16 x i32>* %p, <16 x i8>* %q) "min-legal-vector-width"="256" {
+; CHECK-LABEL: trunc_packus_v16i32_v16i8_store:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vmovdqa (%rdi), %ymm0
+; CHECK-NEXT:    vpackusdw 32(%rdi), %ymm0, %ymm0
+; CHECK-NEXT:    vpermq {{.*#+}} ymm0 = ymm0[0,2,1,3]
+; CHECK-NEXT:    vpmovuswb %ymm0, %xmm0
+; CHECK-NEXT:    vmovdqa %xmm0, (%rsi)
+; CHECK-NEXT:    vzeroupper
+; CHECK-NEXT:    retq
+  %a = load <16 x i32>, <16 x i32>* %p
+  %b = icmp slt <16 x i32> %a, <i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255>
+  %c = select <16 x i1> %b, <16 x i32> %a, <16 x i32> <i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255>
+  %d = icmp sgt <16 x i32> %c, zeroinitializer
+  %e = select <16 x i1> %d, <16 x i32> %c, <16 x i32> zeroinitializer
+  %f = trunc <16 x i32> %e to <16 x i8>
+  store <16 x i8> %f, <16 x i8>* %q
+  ret void
+}
+
 define <32 x i8> @trunc_packus_v32i32_v32i8(<32 x i32>* %p) "min-legal-vector-width"="256" {
 ; CHECK-LABEL: trunc_packus_v32i32_v32i8:
 ; CHECK:       # %bb.0: