[llvm] [LV] Fix emission of debug message in legality check (PR #101924)

[Ramkumar Ramachandra via llvm-commits]

================
@@ -0,0 +1,36 @@
+; This test asserts that we don't emit both
+; successful and unsuccessful message about vectorization.
+
+; RUN: opt -passes=loop-vectorize -debug -disable-output -pass-remarks-missed=loop-vectorize %s 2>&1 | FileCheck %s
----------------
artagnon wrote:

Needs REQUIRES: asserts, since we're checking debug printing.

https://github.com/llvm/llvm-project/pull/101924