[polly] [Polly] Retain vectorization for fallback loop when RTC is false (PR #165525)

[Michael Kruse via llvm-commits]

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@@ -0,0 +1,27 @@
+; RUN: opt %loadNPMPolly -S -passes=polly-codegen -polly-annotate-metadata-vectorize < %s | FileCheck %s
+; RUN: opt %loadNPMPolly -S -passes=polly-codegen < %s | FileCheck %s
+
+; Verify vectorization is not disabled when RTC of Polly is false
+
+; CHECK-NOT: {{.*}} = !{!"llvm.loop.vectorize.enable", i32 0}
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Meinersbur wrote:

`CHECK-NOT` rules are fragile. It "passes" even if no output is generated.

https://github.com/llvm/llvm-project/pull/165525