[SLP][REVEC] Pre-commit test.

Author: HanKuanChen

llvm/test/Transforms/SLPVectorizer/revec.ll

@@ -0,0 +1,32 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -passes=slp-vectorizer -S -slp-revec -slp-max-reg-size=1024 -slp-threshold=-100 %s | FileCheck %s
+
+define void @test1(ptr %a, ptr %b, ptr %c) {
+entry:
+  %arrayidx3 = getelementptr inbounds i32, ptr %a, i64 4
+  %arrayidx7 = getelementptr inbounds i32, ptr %a, i64 8
+  %arrayidx11 = getelementptr inbounds i32, ptr %a, i64 12
+  %0 = load <4 x i32>, ptr %a, align 4
+  %1 = load <4 x i32>, ptr %arrayidx3, align 4
+  %2 = load <4 x i32>, ptr %arrayidx7, align 4
+  %3 = load <4 x i32>, ptr %arrayidx11, align 4
+  %arrayidx19 = getelementptr inbounds i32, ptr %b, i64 4
+  %arrayidx23 = getelementptr inbounds i32, ptr %b, i64 8
+  %arrayidx27 = getelementptr inbounds i32, ptr %b, i64 12
+  %4 = load <4 x i32>, ptr %b, align 4
+  %5 = load <4 x i32>, ptr %arrayidx19, align 4
+  %6 = load <4 x i32>, ptr %arrayidx23, align 4
+  %7 = load <4 x i32>, ptr %arrayidx27, align 4
+  %add.i = add <4 x i32> %4, %0
+  %add.i63 = add <4 x i32> %5, %1
+  %add.i64 = add <4 x i32> %6, %2
+  %add.i65 = add <4 x i32> %7, %3
+  %arrayidx36 = getelementptr inbounds i32, ptr %c, i64 4
+  %arrayidx39 = getelementptr inbounds i32, ptr %c, i64 8
+  %arrayidx42 = getelementptr inbounds i32, ptr %c, i64 12
+  store <4 x i32> %add.i, ptr %c, align 4
+  store <4 x i32> %add.i63, ptr %arrayidx36, align 4
+  store <4 x i32> %add.i64, ptr %arrayidx39, align 4
+  store <4 x i32> %add.i65, ptr %arrayidx42, align 4
+  ret void
+}