From 90f33cf345622541d51f66f6ba1c9acca341761f Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Mon, 30 Oct 2017 18:48:31 +0000
Subject: [PATCH] [X86][SSE] computeKnownBits tests showing missing VSELECT
 demandedelts support

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@316940 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/CodeGen/X86/known-bits-vector.ll | 48 +++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/test/CodeGen/X86/known-bits-vector.ll b/test/CodeGen/X86/known-bits-vector.ll
index 64c623d4ee4..bf9044d18b4 100644
--- a/test/CodeGen/X86/known-bits-vector.ll
+++ b/test/CodeGen/X86/known-bits-vector.ll
@@ -604,3 +604,51 @@ define <4 x float> @knownbits_or_abs_uitofp(<4 x i32> %a0) {
   %6 = uitofp <4 x i32> %5 to <4 x float>
   ret <4 x float> %6
 }
+
+define <4 x float> @knownbits_lshr_and_select_shuffle_uitofp(<4 x i32> %a0, <4 x i32> %a1, <4 x i32> %a2, <4 x i32> %a3) nounwind {
+; X32-LABEL: knownbits_lshr_and_select_shuffle_uitofp:
+; X32:       # BB#0:
+; X32-NEXT:    pushl %ebp
+; X32-NEXT:    movl %esp, %ebp
+; X32-NEXT:    andl $-16, %esp
+; X32-NEXT:    subl $16, %esp
+; X32-NEXT:    vmovaps 8(%ebp), %xmm3
+; X32-NEXT:    vpsrld $1, %xmm2, %xmm4
+; X32-NEXT:    vpsrld $5, %xmm2, %xmm2
+; X32-NEXT:    vpblendw {{.*#+}} xmm2 = xmm2[0,1],xmm4[2,3],xmm2[4,5],xmm4[6,7]
+; X32-NEXT:    vandps {{\.LCPI.*}}, %xmm3, %xmm3
+; X32-NEXT:    vpcmpeqd %xmm1, %xmm0, %xmm0
+; X32-NEXT:    vblendvps %xmm0, %xmm2, %xmm3, %xmm0
+; X32-NEXT:    vpermilps {{.*#+}} xmm0 = xmm0[0,0,2,2]
+; X32-NEXT:    vpblendw {{.*#+}} xmm1 = xmm0[0],mem[1],xmm0[2],mem[3],xmm0[4],mem[5],xmm0[6],mem[7]
+; X32-NEXT:    vpsrld $16, %xmm0, %xmm0
+; X32-NEXT:    vpblendw {{.*#+}} xmm0 = xmm0[0],mem[1],xmm0[2],mem[3],xmm0[4],mem[5],xmm0[6],mem[7]
+; X32-NEXT:    vaddps {{\.LCPI.*}}, %xmm0, %xmm0
+; X32-NEXT:    vaddps %xmm0, %xmm1, %xmm0
+; X32-NEXT:    movl %ebp, %esp
+; X32-NEXT:    popl %ebp
+; X32-NEXT:    retl
+;
+; X64-LABEL: knownbits_lshr_and_select_shuffle_uitofp:
+; X64:       # BB#0:
+; X64-NEXT:    vpsrld $1, %xmm2, %xmm4
+; X64-NEXT:    vpsrld $5, %xmm2, %xmm2
+; X64-NEXT:    vpblendw {{.*#+}} xmm2 = xmm2[0,1],xmm4[2,3],xmm2[4,5],xmm4[6,7]
+; X64-NEXT:    vandps {{.*}}(%rip), %xmm3, %xmm3
+; X64-NEXT:    vpcmpeqd %xmm1, %xmm0, %xmm0
+; X64-NEXT:    vblendvps %xmm0, %xmm2, %xmm3, %xmm0
+; X64-NEXT:    vpermilps {{.*#+}} xmm0 = xmm0[0,0,2,2]
+; X64-NEXT:    vpblendw {{.*#+}} xmm1 = xmm0[0],mem[1],xmm0[2],mem[3],xmm0[4],mem[5],xmm0[6],mem[7]
+; X64-NEXT:    vpsrld $16, %xmm0, %xmm0
+; X64-NEXT:    vpblendw {{.*#+}} xmm0 = xmm0[0],mem[1],xmm0[2],mem[3],xmm0[4],mem[5],xmm0[6],mem[7]
+; X64-NEXT:    vaddps {{.*}}(%rip), %xmm0, %xmm0
+; X64-NEXT:    vaddps %xmm0, %xmm1, %xmm0
+; X64-NEXT:    retq
+  %1 = lshr <4 x i32> %a2, <i32 5, i32 1, i32 5, i32 1>
+  %2 = and <4 x i32> %a3, <i32 255, i32 -1, i32 65535, i32 -1>
+  %3 = icmp eq <4 x i32> %a0, %a1
+  %4 = select <4 x i1> %3, <4 x i32> %1, <4 x i32> %2
+  %5 = shufflevector <4 x i32> %4, <4 x i32> undef, <4 x i32> <i32 0, i32 0, i32 2, i32 2>
+  %6 = uitofp <4 x i32> %5 to <4 x float>
+  ret <4 x float> %6
+}
-- 
2.40.0