[llvm] [SLP][REVEC] getNumElements should not be used as VF when REVEC is enabled. (PR #134031)

[Han-Kuan Chen via llvm-commits]

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@@ -0,0 +1,37 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -mtriple=x86_64-unknown-linux-gnu -mattr=+avx2 -passes=slp-vectorizer -S -slp-revec < %s | FileCheck %s
+
+define i32 @test1(<4 x float> %0, <4 x float> %1) {
+entry:
+  %2 = getelementptr i8, ptr null, i64 288
+  %3 = getelementptr i8, ptr null, i64 304
+  %4 = getelementptr i8, ptr null, i64 416
+  %5 = getelementptr i8, ptr null, i64 432
+  %6 = getelementptr i8, ptr null, i64 256
+  %7 = getelementptr i8, ptr null, i64 272
+  %8 = getelementptr i8, ptr null, i64 288
+  %9 = getelementptr i8, ptr null, i64 304
+  %10 = load <4 x float>, ptr %2, align 16
+  %11 = load <4 x float>, ptr %3, align 16
+  %12 = load <4 x float>, ptr %4, align 16
+  %13 = load <4 x float>, ptr %5, align 16
+  %14 = fmul <4 x float> %10, %0
+  %15 = fmul <4 x float> %11, %0
+  %16 = fmul <4 x float> %12, %0
+  %17 = fmul <4 x float> %13, %0
+  %18 = fsub <4 x float> %14, %1
+  %19 = fsub <4 x float> %15, zeroinitializer
+  %20 = fsub <4 x float> %16, %1
+  %21 = fsub <4 x float> %17, zeroinitializer
+  %22 = fmul <4 x float> %11, zeroinitializer
+  %23 = fmul <4 x float> %13, zeroinitializer
+  %24 = fadd <4 x float> %18, %0
+  %25 = fadd <4 x float> %19, zeroinitializer
+  %26 = fadd <4 x float> %20, %0
+  %27 = fadd <4 x float> %21, zeroinitializer
+  store <4 x float> %24, ptr %6, align 16
+  store <4 x float> %25, ptr %7, align 16
+  store <4 x float> %26, ptr %8, align 16
+  store <4 x float> %27, ptr %9, align 16
+  ret i32 0
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HanKuanChen wrote:

> Checking: Did you intend to pre-commit the test without CHECK lines?

opt would crash. That is why it does not have CHECK lines.

https://github.com/llvm/llvm-project/pull/134031