[SLP][NFC]Add a test for PR79743 with incorrect node demotion, NFC.

Author: alexey-bataev

llvm/test/Transforms/SLPVectorizer/X86/minbitwidth-node-with-multi-users.ll

@@ -0,0 +1,69 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
+; RUN: opt -S --passes=slp-vectorizer -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s
+
+define void @test() {
+; CHECK-LABEL: define void @test() {
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[TMP0:%.*]] = load i16, ptr null, align 2
+; CHECK-NEXT:    [[TMP1:%.*]] = and i8 0, 1
+; CHECK-NEXT:    [[TMP2:%.*]] = and i32 0, 0
+; CHECK-NEXT:    [[TMP3:%.*]] = select i1 false, i32 0, i32 0
+; CHECK-NEXT:    [[TMP4:%.*]] = insertelement <4 x i8> <i8 poison, i8 0, i8 poison, i8 poison>, i8 [[TMP1]], i32 0
+; CHECK-NEXT:    [[TMP5:%.*]] = shufflevector <4 x i8> [[TMP4]], <4 x i8> poison, <4 x i32> <i32 0, i32 0, i32 0, i32 1>
+; CHECK-NEXT:    [[TMP6:%.*]] = trunc <4 x i8> [[TMP5]] to <4 x i1>
+; CHECK-NEXT:    [[TMP7:%.*]] = zext <4 x i1> [[TMP6]] to <4 x i32>
+; CHECK-NEXT:    [[TMP8:%.*]] = shufflevector <4 x i8> [[TMP4]], <4 x i8> poison, <4 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP9:%.*]] = or <4 x i8> [[TMP8]], zeroinitializer
+; CHECK-NEXT:    [[TMP10:%.*]] = sext <4 x i8> [[TMP9]] to <4 x i32>
+; CHECK-NEXT:    [[TMP11:%.*]] = zext <4 x i1> [[TMP6]] to <4 x i32>
+; CHECK-NEXT:    [[TMP12:%.*]] = or <4 x i32> zeroinitializer, [[TMP11]]
+; CHECK-NEXT:    [[TMP13:%.*]] = icmp eq <4 x i32> [[TMP10]], [[TMP12]]
+; CHECK-NEXT:    [[TMP14:%.*]] = shufflevector <4 x i32> <i32 0, i32 0, i32 poison, i32 0>, <4 x i32> [[TMP7]], <4 x i32> <i32 0, i32 1, i32 6, i32 3>
+; CHECK-NEXT:    [[TMP15:%.*]] = select <4 x i1> [[TMP13]], <4 x i32> [[TMP14]], <4 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP16:%.*]] = trunc <4 x i32> [[TMP15]] to <4 x i1>
+; CHECK-NEXT:    [[TMP17:%.*]] = call i1 @llvm.vector.reduce.and.v4i1(<4 x i1> [[TMP16]])
+; CHECK-NEXT:    [[TMP18:%.*]] = zext i1 [[TMP17]] to i32
+; CHECK-NEXT:    [[OP_RDX:%.*]] = and i32 0, [[TMP18]]
+; CHECK-NEXT:    store i32 [[OP_RDX]], ptr null, align 4
+; CHECK-NEXT:    ret void
+;
+entry:
+  %0 = load i16, ptr null, align 2
+  %1 = and i8 0, 1
+  %2 = and i32 0, 0
+  %3 = select i1 false, i32 0, i32 0
+  %i2 = sext i8 %1 to i32
+  %i3 = or i8 %1, 0
+  %i4 = sext i8 %i3 to i32
+  %i5 = or i32 0, %i2
+  %b1 = icmp eq i32 %i4, %i5
+  %a1 = select i1 %b1, i32 0, i32 0
+  %4 = and i32 %a1, 0
+  %s1 = and i32 %4, 0
+  %i8 = sext i8 %1 to i32
+  %i9 = or i8 %1, 0
+  %i10 = sext i8 %i9 to i32
+  %i11 = or i32 0, %i8
+  %b2 = icmp eq i32 %i10, %i11
+  %a2 = select i1 %b2, i32 0, i32 0
+  %5 = and i32 %a2, 0
+  %s2 = and i32 %5, %s1
+  %i14 = sext i8 %1 to i32
+  %i15 = or i8 %1, 0
+  %i16 = sext i8 %i15 to i32
+  %i17 = or i32 0, %i14
+  %b3 = icmp eq i32 %i16, %i17
+  %a3 = select i1 %b3, i32 %i14, i32 0
+  %6 = and i32 %a3, 0
+  %s3 = and i32 %6, %s2
+  %i20 = sext i8 0 to i32
+  %i21 = or i8 %1, 0
+  %i22 = sext i8 %i21 to i32
+  %i23 = or i32 0, %i20
+  %b4 = icmp eq i32 %i22, %i23
+  %a4 = select i1 %b4, i32 0, i32 0
+  %7 = and i32 %a4, 0
+  %s4 = and i32 %7, %s3
+  store i32 %s4, ptr null, align 4
+  ret void
+}