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Using target specific nodes for shuffle nodes makes the mask

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check more strict, breaking some cases not checked in the
testsuite, but also exposes some foldings not done before,
as this example:

  movaps  (%rdi), %xmm0
  movaps  (%rax), %xmm1
  movaps  %xmm0, %xmm2
  movss %xmm1, %xmm2
  shufps  $36, %xmm2, %xmm0

now is generated as:

  movaps  (%rdi), %xmm0
  movaps  %xmm0, %xmm1
  movlps  (%rax), %xmm1
  shufps  $36, %xmm1, %xmm0



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112753 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bruno Cardoso Lopes 2010-09-01 22:33:20 +00:00
parent 543cf05b9c
commit 29c353b9c3
2 changed files with 17 additions and 0 deletions
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3
lib/Target/X86/X86InstrSSE.td
View File

@ -5909,6 +5909,9 @@ def : Pat<(v4i32 (X86Movlps VR128:$src1, (load addr:$src2))),
def : Pat<(X86Movlps VR128:$src1,
(bc_v4f32 (v2f64 (scalar_to_vector (loadf64 addr:$src2))))),
(MOVLPSrm VR128:$src1, addr:$src2)>;
def : Pat<(X86Movlps VR128:$src1,
(bc_v4i32 (v2i64 (load addr:$src2)))),
(MOVLPSrm VR128:$src1, addr:$src2)>;
// Shuffle with MOVLPD
def : Pat<(v2f64 (X86Movlpd VR128:$src1, (load addr:$src2))),

14
test/CodeGen/X86/vec_shuffle-37.ll Normal file
View File

@ -0,0 +1,14 @@
; RUN: llc < %s -march=x86-64 | FileCheck %s
define <4 x i32> @t00(<4 x i32>* %a0) nounwind ssp {
entry:
; CHECK: movaps (%rdi), %xmm0
; CHECK-NEXT: movaps %xmm0, %xmm1
; CHECK-NEXT: movlps (%rax), %xmm1
; CHECK-NEXT: shufps $36, %xmm1, %xmm0
%0 = load <4 x i32>* undef, align 16
%1 = load <4 x i32>* %a0, align 16
%2 = shufflevector <4 x i32> %1, <4 x i32> %0, <4 x i32> <i32 0, i32 1, i32 2, i32 4>
ret <4 x i32> %2
}