[llvm] [lit][NFC] Avoid unintended -EMPTY suffix in check prefix (PR #99690)

[Paul Kirth via llvm-commits]

https://github.com/ilovepi created https://github.com/llvm/llvm-project/pull/99690

FileCheck has special handline for the `-EMPTY` suffix, that should
match empty lines. Overloading the suffix can be a source of confusion
when reading tests. Additionally, the current implementation seems to
match the following expressions, which appears to be a bug in FileCheck.


>From 244960afc8765314853ec8b2083a224b026b102e Mon Sep 17 00:00:00 2001
From: Paul Kirth <paulkirth at google.com>
Date: Fri, 19 Jul 2024 12:38:47 -0700
Subject: [PATCH] =?UTF-8?q?[=F0=9D=98=80=F0=9D=97=BD=F0=9D=97=BF]=20initia?=
 =?UTF-8?q?l=20version?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Created using spr 1.3.4
---
 llvm/utils/lit/tests/Inputs/shtest-env/env-calls-env.txt | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/llvm/utils/lit/tests/Inputs/shtest-env/env-calls-env.txt b/llvm/utils/lit/tests/Inputs/shtest-env/env-calls-env.txt
index e4997b1250ed3..26150c413dc03 100644
--- a/llvm/utils/lit/tests/Inputs/shtest-env/env-calls-env.txt
+++ b/llvm/utils/lit/tests/Inputs/shtest-env/env-calls-env.txt
@@ -1,10 +1,10 @@
 # Check that internal env can call internal env.
 
 # RUN: env env %{python} print_environment.py \
-# RUN: | FileCheck -check-prefix=CHECK-2-EMPTY %s
+# RUN: | FileCheck -check-prefix=CHECK-2-EMPTY-ARGS %s
 #
-# CHECK-2-EMPTY: BAR = 2
-# CHECK-2-EMPTY: FOO = 1
+# CHECK-2-EMPTY-ARGS: BAR = 2
+# CHECK-2-EMPTY-ARGS: FOO = 1
 
 # RUN: env FOO=2 env BAR=1 %{python} print_environment.py \
 # RUN: | FileCheck -check-prefix=CHECK-2-VAL %s