[clang] [NFC] Add redirect the output (PR #179623)

[Mikael Holmen via cfe-commits]

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@@ -5,11 +5,11 @@
 // RUN:         -o - -mconstructor-aliases -O1 -disable-llvm-passes | \
 // RUN:         FileCheck %s --check-prefix=CHECK --check-prefix=NOCXX
 // RUN: %clang_cc1 -triple x86_64-windows -fasync-exceptions -fcxx-exceptions -fexceptions \
-// RUN:         -fms-extensions -x c++ -emit-llvm -verify %s -DERR1
+// RUN:         -fms-extensions -x c++ -emit-llvm -verify -o - %s -DERR1
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mikaelholmen wrote:

We use "-o /dev/null" in 2311 RUN lines in clang/test, so that is a very common way to throw away the output when it's not interesting.
Redirecting to stdout in this case looks wrong.

https://github.com/llvm/llvm-project/pull/179623