[llvm] Allow this test to pass when the source is on a read-only filesystem (PR #134179)

[via llvm-commits]

https://github.com/Sterling-Augustine created https://github.com/llvm/llvm-project/pull/134179

llc attempts to create an empty file in the current directory, but it can't do that on a read-only file system. Send that empty-output to stdout, which prevents this failure.

>From 19a08eae0da999e692944c19eab5318a5962c585 Mon Sep 17 00:00:00 2001
From: Sterling Augustine <saugustine at google.com>
Date: Wed, 2 Apr 2025 16:41:43 -0700
Subject: [PATCH] Allow this test to pass when the source is on a read-only
 filesystem

llc attempts to create an empty file in the current directory, but
it can't do that on a read-only file system. Send that empty-output
to stdout, which prevents this failure.
---
 .../CodeGen/AMDGPU/llvm.amdgcn.global.load.lds.err.ll     | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.global.load.lds.err.ll b/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.global.load.lds.err.ll
index 383f6c1288d13..f04c7ec9884bd 100644
--- a/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.global.load.lds.err.ll
+++ b/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.global.load.lds.err.ll
@@ -1,7 +1,7 @@
-; RUN: not --crash llc -mtriple=amdgcn -mcpu=gfx810 %s 2>&1 | FileCheck --ignore-case %s
-; RUN: not --crash llc -global-isel -mtriple=amdgcn -mcpu=gfx810 %s 2>&1 | FileCheck --ignore-case %s
-; RUN: not --crash llc -mtriple=amdgcn -mcpu=gfx1100 %s 2>&1 | FileCheck --ignore-case %s
-; RUN: not --crash llc -global-isel -mtriple=amdgcn -mcpu=gfx1100 %s 2>&1 | FileCheck --ignore-case %s
+; RUN: not --crash llc -o - -mtriple=amdgcn -mcpu=gfx810 %s 2>&1 | FileCheck --ignore-case %s
+; RUN: not --crash llc -o - -global-isel -mtriple=amdgcn -mcpu=gfx810 %s 2>&1 | FileCheck --ignore-case %s
+; RUN: not --crash llc -o - -mtriple=amdgcn -mcpu=gfx1100 %s 2>&1 | FileCheck --ignore-case %s
+; RUN: not --crash llc -o - -global-isel -mtriple=amdgcn -mcpu=gfx1100 %s 2>&1 | FileCheck --ignore-case %s
 ;
 ; CHECK: LLVM ERROR: Cannot select