[SLP][NFC]Add a test with incorrect (more poisnous) reduction chain

Author: alexey-bataev

llvm/test/Transforms/SLPVectorizer/logical-ops-poisonous-repeated.ll

@@ -0,0 +1,32 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
+; RUN: opt -S --passes=slp-vectorizer < %s | FileCheck %s
+
+define i1 @test(<4 x i32> %x) {
+; CHECK-LABEL: define i1 @test(
+; CHECK-SAME: <4 x i32> [[X:%.*]]) {
+; CHECK-NEXT:    [[X0:%.*]] = extractelement <4 x i32> [[X]], i32 0
+; CHECK-NEXT:    [[X1:%.*]] = extractelement <4 x i32> [[X]], i32 -1
+; CHECK-NEXT:    [[X2:%.*]] = extractelement <4 x i32> [[X]], i32 2
+; CHECK-NEXT:    [[X3:%.*]] = extractelement <4 x i32> [[X]], i32 3
+; CHECK-NEXT:    [[TMP1:%.*]] = icmp ugt i32 [[X0]], 0
+; CHECK-NEXT:    [[C1:%.*]] = icmp slt i32 [[X1]], 0
+; CHECK-NEXT:    [[C2:%.*]] = icmp sgt i32 [[X2]], 0
+; CHECK-NEXT:    [[C3:%.*]] = icmp slt i32 [[X3]], 0
+; CHECK-NEXT:    [[OP_RDX:%.*]] = select i1 [[C3]], i1 [[C1]], i1 false
+; CHECK-NEXT:    [[OP_RDX1:%.*]] = select i1 [[OP_RDX]], i1 [[TMP1]], i1 false
+; CHECK-NEXT:    ret i1 [[OP_RDX1]]
+;
+  %x0 = extractelement <4 x i32> %x, i32 0
+  %x1 = extractelement <4 x i32> %x, i32 -1
+  %x2 = extractelement <4 x i32> %x, i32 2
+  %x3 = extractelement <4 x i32> %x, i32 3
+  %2 = icmp ugt i32 %x0, 0
+  %c1 = icmp slt i32 %x1, 0
+  %c2 = icmp sgt i32 %x2, 0
+  %c3 = icmp slt i32 %x3, 0
+  %s1 = select i1 %2, i1 %c1, i1 false
+  %s2 = select i1 %s1, i1 %c3, i1 false
+  %s3 = select i1 %s2, i1 %c3, i1 false
+  ret i1 %s3
+}
+