Normalize splat 256bit vectors with 8 elements.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168600 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 276859b0550570b41e1e2b9ca29f5a0d5d725d7e..f08477cc9c3001924695f10c24cf1e66de488ea4 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -6689,7 +6689,7 @@ X86TargetLowering::NormalizeVectorShuffle(SDValue Op, SelectionDAG &DAG) const {
 
     // Handle splats by matching through known shuffle masks
     if ((Size == 128 && NumElem <= 4) ||
-        (Size == 256 && NumElem < 8))
+        (Size == 256 && NumElem <= 8))
       return SDValue();
 
     // All remaning splats are promoted to target supported vector shuffles.

diff --git a/test/CodeGen/X86/avx-splat.ll b/test/CodeGen/X86/avx-splat.ll
index 94bcddd9759284e320c87fb321ffeafa6bd6fb28..5ad75236e11af26bbfd4fc41ecc1abea834bc7d6 100644 (file)
--- a/test/CodeGen/X86/avx-splat.ll
+++ b/test/CodeGen/X86/avx-splat.ll
@@ -47,9 +47,9 @@ entry:
 ;   shuffle (scalar_to_vector (load (ptr + 4))), undef, <0, 0, 0, 0>
 ; To:
 ;   shuffle (vload ptr)), undef, <1, 1, 1, 1>
-; CHECK: vmovaps
+; CHECK: vmovdqa
+; CHECK-NEXT: vpshufd $-1
 ; CHECK-NEXT: vinsertf128  $1
-; CHECK-NEXT: vpermilps $-1
 define <8 x float> @funcE() nounwind {
 allocas:
   %udx495 = alloca [18 x [18 x float]], align 32
@@ -75,8 +75,8 @@ __load_and_broadcast_32.exit1249:                 ; preds = %load.i1247, %for_ex
   ret <8 x float> %load_broadcast12281250
 }
 
-; CHECK: vinsertf128 $1
-; CHECK-NEXT: vpermilps $0
+; CHECK: vpshufd $0
+; CHECK-NEXT: vinsertf128 $1
 define <8 x float> @funcF(i32 %val) nounwind {
   %ret6 = insertelement <8 x i32> undef, i32 %val, i32 6
   %ret7 = insertelement <8 x i32> %ret6, i32 %val, i32 7
@@ -84,8 +84,8 @@ define <8 x float> @funcF(i32 %val) nounwind {
   ret <8 x float> %tmp
 }
 
-; CHECK: vinsertf128  $1
-; CHECK-NEXT: vpermilps  $0
+; CHECK: vpermilps  $0
+; CHECK-NEXT: vinsertf128  $1
 define <8 x float> @funcG(<8 x float> %a) nounwind uwtable readnone ssp {
 entry:
   %shuffle = shufflevector <8 x float> %a, <8 x float> undef, <8 x i32> <i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0>
@@ -93,8 +93,8 @@ entry:
 }
 
 ; CHECK: vextractf128  $1
-; CHECK-NEXT: vinsertf128  $1
 ; CHECK-NEXT: vpermilps  $85
+; CHECK-NEXT: vinsertf128  $1
 define <8 x float> @funcH(<8 x float> %a) nounwind uwtable readnone ssp {
 entry:
   %shuffle = shufflevector <8 x float> %a, <8 x float> undef, <8 x i32> <i32 5, i32 5, i32 5, i32 5, i32 5, i32 5, i32 5, i32 5>