[SLP][NFC]Add a test for reordered scalars with not reordered reuse coefficient.

diff --git a/llvm/test/Transforms/SLPVectorizer/X86/same-scalars-reordered-in-reduction.ll b/llvm/test/Transforms/SLPVectorizer/X86/same-scalars-reordered-in-reduction.ll
new file mode 100644 (file)
index 0000000..01379ae
--- /dev/null
+++ b/llvm/test/Transforms/SLPVectorizer/X86/same-scalars-reordered-in-reduction.ll
@@ -0,0 +1,34 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
+; RUN: opt -S -passes=slp-vectorizer -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s
+
+define i32 @test() {
+; CHECK-LABEL: define i32 @test() {
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[SQ:%.*]] = alloca [64 x i32], i32 0, align 16
+; CHECK-NEXT:    [[TMP0:%.*]] = getelementptr inbounds [64 x i32], ptr [[SQ]], i64 0, i64 1
+; CHECK-NEXT:    [[TMP1:%.*]] = load <4 x i32>, ptr [[TMP0]], align 4
+; CHECK-NEXT:    [[TMP2:%.*]] = mul <4 x i32> [[TMP1]], <i32 3, i32 2, i32 2, i32 1>
+; CHECK-NEXT:    [[TMP3:%.*]] = call i32 @llvm.vector.reduce.add.v4i32(<4 x i32> [[TMP2]])
+; CHECK-NEXT:    ret i32 [[TMP3]]
+;
+entry:
+  %sq = alloca [64 x i32], i32 0, align 16
+  %0 = getelementptr inbounds [64 x i32], ptr %sq, i64 0, i64 1
+  %elt_1 = load i32, ptr %0, align 4
+  %1 = getelementptr [64 x i32], ptr %sq, i64 0, i64 2
+  %elt_2 = load i32, ptr %1, align 8
+  %2 = getelementptr [64 x i32], ptr %sq, i64 0, i64 3
+  %elt_3 = load i32, ptr %2, align 4
+  %3 = getelementptr [64 x i32], ptr %sq, i64 0, i64 4
+  %elt_4 = load i32, ptr %3, align 16
+
+  %4 = add i32 %elt_2, %elt_3
+  %5 = add i32 %4, %elt_2
+  %6 = add i32 %5, %elt_1
+  %7 = add i32 %6, %elt_4
+  %8 = add i32 %7, %elt_3
+  %9 = add i32 %8, %elt_2
+  %10 = add i32 %9, %elt_1
+
+  ret i32 %10
+}