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Normalize splat 256bit vectors with 8 elements. 

llvm-svn: 168600
This commit is contained in:
Jakub Staszak 2012-11-26 19:24:31 +00:00
parent e3beeaa5e7
commit a17f3f8c30
2 changed files with 8 additions and 8 deletions
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2
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -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.

14
llvm/test/CodeGen/X86/avx-splat.ll
View File

@ -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>