[llvm] r351377 - [X86] Add test case for D56765. NFC

[Craig Topper via llvm-commits]

Author: ctopper
Date: Wed Jan 16 13:29:26 2019
New Revision: 351377

URL: http://llvm.org/viewvc/llvm-project?rev=351377&view=rev
Log:
[X86] Add test case for D56765. NFC

Modified:
    llvm/trunk/test/CodeGen/X86/vselect.ll

Modified: llvm/trunk/test/CodeGen/X86/vselect.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/vselect.ll?rev=351377&r1=351376&r2=351377&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/vselect.ll (original)
+++ llvm/trunk/test/CodeGen/X86/vselect.ll Wed Jan 16 13:29:26 2019
@@ -610,3 +610,39 @@ define <2 x i32> @simplify_select(i32 %x
   ret <2 x i32> %r
 }
 
+; Test to make sure we don't try to insert a new setcc to swap the operands
+; of select with all zeros LHS if the setcc has additional users.
+define void @vselect_allzeros_LHS_multiple_use_setcc(<4 x i32> %x, <4 x i32> %y, <4 x i32> %z, <4 x i32>* %p1, <4 x i32>* %p2) {
+; SSE-LABEL: vselect_allzeros_LHS_multiple_use_setcc:
+; SSE:       # %bb.0:
+; SSE-NEXT:    movdqa {{.*#+}} xmm3 = [1,2,4,8]
+; SSE-NEXT:    pand %xmm3, %xmm0
+; SSE-NEXT:    pcmpeqd %xmm0, %xmm3
+; SSE-NEXT:    pxor %xmm4, %xmm4
+; SSE-NEXT:    pcmpeqd %xmm0, %xmm4
+; SSE-NEXT:    pand %xmm1, %xmm4
+; SSE-NEXT:    pand %xmm2, %xmm3
+; SSE-NEXT:    movdqa %xmm4, (%rdi)
+; SSE-NEXT:    movdqa %xmm3, (%rsi)
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: vselect_allzeros_LHS_multiple_use_setcc:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vmovdqa {{.*#+}} xmm3 = [1,2,4,8]
+; AVX-NEXT:    vpand %xmm3, %xmm0, %xmm0
+; AVX-NEXT:    vpcmpeqd %xmm3, %xmm0, %xmm3
+; AVX-NEXT:    vpxor %xmm4, %xmm4, %xmm4
+; AVX-NEXT:    vpcmpeqd %xmm4, %xmm0, %xmm0
+; AVX-NEXT:    vpand %xmm1, %xmm0, %xmm0
+; AVX-NEXT:    vpand %xmm2, %xmm3, %xmm1
+; AVX-NEXT:    vmovdqa %xmm0, (%rdi)
+; AVX-NEXT:    vmovdqa %xmm1, (%rsi)
+; AVX-NEXT:    retq
+  %and = and <4 x i32> %x, <i32 1, i32 2, i32 4, i32 8>
+  %cond = icmp ne <4 x i32> %and, zeroinitializer
+  %sel1 = select <4 x i1> %cond, <4 x i32> zeroinitializer, <4 x i32> %y
+  %sel2 = select <4 x i1> %cond, <4 x i32> %z, <4 x i32> zeroinitializer
+  store <4 x i32> %sel1, <4 x i32>* %p1
+  store <4 x i32> %sel2, <4 x i32>* %p2
+  ret void
+}