[SLP][NFC]Add a test with incorrect reduction of poisoned logical bool.

Author: alexey-bataev

llvm/test/Transforms/SLPVectorizer/const-bool-logical-or-reduction.ll

@@ -0,0 +1,16 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
+; RUN: opt -passes=slp-vectorizer -S < %s | FileCheck %s
+
+define i1 @test(i32 %inc) {
+; CHECK-LABEL: define i1 @test(
+; CHECK-SAME: i32 [[INC:%.*]]) {
+; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i32 [[INC]], 3
+; CHECK-NEXT:    [[OP_RDX:%.*]] = select i1 poison, i1 true, i1 [[CMP]]
+; CHECK-NEXT:    ret i1 [[OP_RDX]]
+;
+  %cmp = icmp ult i32 %inc, 3
+  %sel1 = select i1 %cmp, i1 true, i1 poison
+  %sel2 = select i1 %sel1, i1 true, i1 poison
+  %sel3 = select i1 %sel2, i1 true, i1 poison
+  ret i1 %sel3
+}