https://github.com/oontvoo created 
https://github.com/llvm/llvm-project/pull/159138



Note: this was originally done in (#158698) but was reverted in the pr/158844 
(which re-applied the original rev)

>From a8fc11e4885aa4746fe15a783e55b6b338da7ba7 Mon Sep 17 00:00:00 2001
From: Vy Nguyen <[email protected]>
Date: Tue, 16 Sep 2025 13:30:42 -0400
Subject: [PATCH] [clang][nfc] Fix tests to avoid writing output to unreachable
 location, which might cause them to fail

Note: this was originally done in (#158698) but was reverted in the pr/158844 
(which re-applied the original rev)
---
 clang/test/Driver/clang_f_opts.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/clang/test/Driver/clang_f_opts.c b/clang/test/Driver/clang_f_opts.c
index eb3994ddabcd3..7681ae73dfeb0 100644
--- a/clang/test/Driver/clang_f_opts.c
+++ b/clang/test/Driver/clang_f_opts.c
@@ -52,11 +52,11 @@
 // CHECK-INTERCHANGE-LOOPS: "-floop-interchange"
 // CHECK-NO-INTERCHANGE-LOOPS: "-fno-loop-interchange"
 
-// RUN: %clang -### -S -fexperimental-loop-fusion %s 2>&1 | FileCheck 
-check-prefix=CHECK-FUSE-LOOPS %s
+// RUN: %clang -### -S -fexperimental-loop-fusion %s -o /dev/null 2>&1 | 
FileCheck -check-prefix=CHECK-FUSE-LOOPS %s
 // CHECK-FUSE-LOOPS: "-fexperimental-loop-fusion"
 //
-// RUN: %clang -c -fexperimental-loop-fusion -mllvm -print-pipeline-passes -O3 
%s 2>&1 | FileCheck --check-prefixes=LOOP-FUSION-ON %s
-// RUN: %clang -c -mllvm -print-pipeline-passes -O3 %s 2>&1 | FileCheck 
--check-prefixes=LOOP-FUSION-OFF %s
+// RUN: %clang -c -fexperimental-loop-fusion -mllvm -print-pipeline-passes -O3 
%s -o /dev/null 2>&1 | FileCheck --check-prefixes=LOOP-FUSION-ON %s
+// RUN: %clang -c -mllvm -print-pipeline-passes -O3 %s -o /dev/null 2>&1 | 
FileCheck --check-prefixes=LOOP-FUSION-OFF %s
 
 // LOOP-FUSION-ON: loop-fusion
 // LOOP-FUSION-OFF-NOT: loop-fusion

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