[SLP][NFC]Add lshr version of the test with casting, NFC.

Author: alexey-bataev

llvm/test/Transforms/SLPVectorizer/X86/reorder-possible-strided-node.ll

@@ -54,3 +54,57 @@ entry:
   store i32 %conv27, ptr getelementptr inbounds ([4 x i32], ptr null, i64 8, i64 3), align 4
   ret void
 }
+
+define void @test1() {
+; CHECK-LABEL: define void @test1(
+; CHECK-SAME: ) #[[ATTR0]] {
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[ARRAYIDX22:%.*]] = getelementptr i32, ptr null, i64 60
+; CHECK-NEXT:    [[TMP0:%.*]] = call <4 x i32> @llvm.masked.gather.v4i32.v4p0(<4 x ptr> getelementptr (i32, <4 x ptr> zeroinitializer, <4 x i64> <i64 1, i64 33, i64 7, i64 0>), i32 4, <4 x i1> <i1 true, i1 true, i1 true, i1 true>, <4 x i32> poison)
+; CHECK-NEXT:    [[TMP1:%.*]] = load <4 x i32>, ptr [[ARRAYIDX22]], align 4
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <4 x i32> [[TMP1]], <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP3:%.*]] = mul <4 x i32> [[TMP2]], [[TMP0]]
+; CHECK-NEXT:    [[TMP4:%.*]] = sext <4 x i32> [[TMP3]] to <4 x i64>
+; CHECK-NEXT:    [[TMP5:%.*]] = lshr <4 x i64> [[TMP4]], zeroinitializer
+; CHECK-NEXT:    [[TMP6:%.*]] = trunc <4 x i64> [[TMP5]] to <4 x i32>
+; CHECK-NEXT:    store <4 x i32> [[TMP6]], ptr getelementptr inbounds ([4 x i32], ptr null, i64 8, i64 0), align 16
+; CHECK-NEXT:    ret void
+;
+entry:
+  %arrayidx1 = getelementptr i32, ptr null, i64 1
+  %0 = load i32, ptr %arrayidx1, align 4
+  %arrayidx2 = getelementptr i32, ptr null, i64 63
+  %1 = load i32, ptr %arrayidx2, align 4
+  %mul = mul i32 %1, %0
+  %conv = sext i32 %mul to i64
+  %shr = lshr i64 %conv, 0
+  %conv3 = trunc i64 %shr to i32
+  store i32 %conv3, ptr getelementptr inbounds ([4 x i32], ptr null, i64 8, i64 0), align 16
+  %arrayidx5 = getelementptr i32, ptr null, i64 33
+  %2 = load i32, ptr %arrayidx5, align 4
+  %arrayidx6 = getelementptr i32, ptr null, i64 62
+  %3 = load i32, ptr %arrayidx6, align 4
+  %mul7 = mul i32 %3, %2
+  %conv8 = sext i32 %mul7 to i64
+  %shr10 = lshr i64 %conv8, 0
+  %conv11 = trunc i64 %shr10 to i32
+  store i32 %conv11, ptr getelementptr inbounds ([4 x i32], ptr null, i64 8, i64 1), align 4
+  %arrayidx13 = getelementptr i32, ptr null, i64 7
+  %4 = load i32, ptr %arrayidx13, align 4
+  %arrayidx14 = getelementptr i32, ptr null, i64 61
+  %5 = load i32, ptr %arrayidx14, align 4
+  %mul15 = mul i32 %5, %4
+  %conv16 = sext i32 %mul15 to i64
+  %shr18 = lshr i64 %conv16, 0
+  %conv19 = trunc i64 %shr18 to i32
+  store i32 %conv19, ptr getelementptr inbounds ([4 x i32], ptr null, i64 8, i64 2), align 8
+  %6 = load i32, ptr null, align 4
+  %arrayidx22 = getelementptr i32, ptr null, i64 60
+  %7 = load i32, ptr %arrayidx22, align 4
+  %mul23 = mul i32 %7, %6
+  %conv24 = sext i32 %mul23 to i64
+  %shr26 = lshr i64 %conv24, 0
+  %conv27 = trunc i64 %shr26 to i32
+  store i32 %conv27, ptr getelementptr inbounds ([4 x i32], ptr null, i64 8, i64 3), align 4
+  ret void
+}