[SLP][NFC]Add a test with the incorrect casting of the abs argument, NFC

(cherry picked from commit 825f9cb)

Author: alexey-bataev

llvm/test/Transforms/SLPVectorizer/abs-overflow-incorrect-minbws.ll

@@ -0,0 +1,31 @@
+; 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 i32 @test(i32 %n) {
+; CHECK-LABEL: define i32 @test(
+; CHECK-SAME: i32 [[N:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*:]]
+; CHECK-NEXT:    [[TMP0:%.*]] = insertelement <2 x i32> poison, i32 [[N]], i32 0
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <2 x i32> [[TMP0]], <2 x i32> poison, <2 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = add <2 x i32> [[TMP1]], <i32 1, i32 2>
+; CHECK-NEXT:    [[TMP3:%.*]] = mul <2 x i32> [[TMP2]], <i32 273837369, i32 273837369>
+; CHECK-NEXT:    [[TMP4:%.*]] = call <2 x i32> @llvm.abs.v2i32(<2 x i32> [[TMP3]], i1 false)
+; CHECK-NEXT:    [[TMP5:%.*]] = extractelement <2 x i32> [[TMP4]], i32 0
+; CHECK-NEXT:    [[TMP6:%.*]] = extractelement <2 x i32> [[TMP4]], i32 1
+; CHECK-NEXT:    [[RES1:%.*]] = add i32 [[TMP5]], [[TMP6]]
+; CHECK-NEXT:    ret i32 [[RES1]]
+;
+entry:
+  %n1 = add i32 %n, 1
+  %zn1 = zext nneg i32 %n1 to i64
+  %m1 = mul nuw nsw i64 %zn1, 273837369
+  %a1 = call i64 @llvm.abs.i64(i64 %m1, i1 true)
+  %t1 = trunc i64 %a1 to i32
+  %n2 = add i32 %n, 2
+  %zn2 = zext nneg i32 %n2 to i64
+  %m2 = mul nuw nsw i64 %zn2, 273837369
+  %a2 = call i64 @llvm.abs.i64(i64 %m2, i1 true)
+  %t2 = trunc i64 %a2 to i32
+  %res1 = add i32 %t1, %t2
+  ret i32 %res1
+}