[clang] [flang] [mlir] [flang] Add support for -mprefer-vector-width=<value> (PR #141380)

[Tarun Prabhu via cfe-commits]

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@@ -0,0 +1,9 @@
+; RUN: mlir-translate -import-llvm -split-input-file %s | FileCheck %s
+
+; CHECK-LABEL: llvm.func @prefer_vector_width()
+; CHECK: prefer_vector_width = "128"
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tarunprabhu wrote:

Should this be `CHECK-SAME`? I assume that you intend to match `prefer_vector_width` which appears in the attributes of `llvm.func`. The attributes appear on the same line, don't they?

https://github.com/llvm/llvm-project/pull/141380