[SLP][NFC]Add a test with incorrect reduced gather node with extra use in cmp node, NFC.

Author: alexey-bataev

llvm/test/Transforms/SLPVectorizer/X86/gather-with-cmp-user.ll

@@ -0,0 +1,50 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
+; RUN: opt -S --passes=slp-vectorizer -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s
+
+define i1 @test(i32 %g, i16 %d) {
+; CHECK-LABEL: define i1 @test(
+; CHECK-SAME: i32 [[G:%.*]], i16 [[D:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*:]]
+; CHECK-NEXT:    [[TMP0:%.*]] = and i16 [[D]], 1
+; CHECK-NEXT:    [[XOR_I_I:%.*]] = xor i32 [[G]], 1
+; CHECK-NEXT:    [[TMP1:%.*]] = trunc i32 [[G]] to i8
+; CHECK-NEXT:    [[TMP2:%.*]] = insertelement <2 x i8> poison, i8 [[TMP1]], i32 0
+; CHECK-NEXT:    [[TMP3:%.*]] = trunc i32 [[XOR_I_I]] to i8
+; CHECK-NEXT:    [[TMP4:%.*]] = insertelement <2 x i8> [[TMP2]], i8 [[TMP3]], i32 1
+; CHECK-NEXT:    [[TMP5:%.*]] = shufflevector <2 x i8> [[TMP4]], <2 x i8> poison, <4 x i32> <i32 0, i32 1, i32 0, i32 1>
+; CHECK-NEXT:    [[TMP6:%.*]] = add <4 x i8> [[TMP5]], <i8 -9, i8 -9, i8 -1, i8 -1>
+; CHECK-NEXT:    [[TMP7:%.*]] = icmp sgt <4 x i8> [[TMP6]], <i8 -3, i8 -3, i8 -3, i8 -3>
+; CHECK-NEXT:    [[TMP8:%.*]] = zext <4 x i1> [[TMP7]] to <4 x i8>
+; CHECK-NEXT:    [[TMP9:%.*]] = sext <2 x i8> [[TMP4]] to <2 x i32>
+; CHECK-NEXT:    [[TMP10:%.*]] = shufflevector <2 x i32> [[TMP9]], <2 x i32> poison, <4 x i32> <i32 0, i32 1, i32 0, i32 1>
+; CHECK-NEXT:    [[TMP11:%.*]] = zext <4 x i8> [[TMP8]] to <4 x i32>
+; CHECK-NEXT:    [[TMP12:%.*]] = icmp sgt <4 x i32> [[TMP10]], [[TMP11]]
+; CHECK-NEXT:    [[TMP13:%.*]] = call i1 @llvm.vector.reduce.and.v4i1(<4 x i1> [[TMP12]])
+; CHECK-NEXT:    ret i1 [[TMP13]]
+;
+entry:
+  %0 = and i16 %d, 1
+  %xor.i.i = xor i32 %g, 1
+  %conv1.i.i = trunc i32 %xor.i.i to i8
+  %notsub.i = add i8 %conv1.i.i, -1
+  %cmp.i.i = icmp sgt i8 %notsub.i, -3
+  %conv3.i.i = zext i1 %cmp.i.i to i32
+  %cmp4.i.i = icmp sgt i32 %xor.i.i, %conv3.i.i
+  %conv1.1.i.i = trunc i32 %g to i8
+  %notsub25.i = add i8 %conv1.1.i.i, -1
+  %cmp.1.i.i = icmp sgt i8 %notsub25.i, -3
+  %conv3.1.i.i = zext i1 %cmp.1.i.i to i32
+  %cmp4.1.i.i = icmp sgt i32 %g, %conv3.1.i.i
+  %notsub26.i = add i8 %conv1.1.i.i, -9
+  %cmp.i17.i = icmp sgt i8 %notsub26.i, -3
+  %conv3.i18.i = zext i1 %cmp.i17.i to i32
+  %cmp4.i19.i = icmp sgt i32 %g, %conv3.i18.i
+  %notsub27.i = add i8 %conv1.i.i, -9
+  %cmp.1.i22.i = icmp sgt i8 %notsub27.i, -3
+  %conv3.1.i23.i = zext i1 %cmp.1.i22.i to i32
+  %cmp4.1.i24.i = icmp sgt i32 %xor.i.i, %conv3.1.i23.i
+  %1 = and i1 %cmp4.i19.i, %cmp4.1.i24.i
+  %2 = and i1 %cmp4.i.i, %1
+  %3 = and i1 %cmp4.1.i.i, %2
+  ret i1 %3
+}