[clang] [clang] [test] Skip a test that sets PATH= on Windows (PR #95096)

[Martin Storsjö via cfe-commits]

https://github.com/mstorsjo updated https://github.com/llvm/llvm-project/pull/95096

>From 11b577825a15bcd6139863adb047ef5f7b161a36 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin at martin.st>
Date: Tue, 11 Jun 2024 13:14:47 +0300
Subject: [PATCH] [clang] [test] Skip a test that sets PATH= on Windows

The same has been done in a couple other existing tests, that also
are skipped on Windows (e.g. ld-path.c). Some tests that really
do want to test setting the path on Windows does it differently,
see e.g. ps4-ps5-linker-win.c.

Since a65771fce4a2f25f16d4b3918ad6a11370637f7b, the spirv-toolchain.cl
test does one test where PATH is set. Setting PATH does work in
some build configurations - however, if built with e.g. llvm-mingw,
the built Clang executable depends on libc++.dll (and libunwind.dll)
which are found in PATH. If the PATH is overridden, the newly built
Clang executable no longer can run.

Split the test that requires setting PATH to a separate file,
and mark it as unsupported on Windows.
---
 clang/test/Driver/spirv-toolchain.cl | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/clang/test/Driver/spirv-toolchain.cl b/clang/test/Driver/spirv-toolchain.cl
index de818177cb19f..eff02f809ce83 100644
--- a/clang/test/Driver/spirv-toolchain.cl
+++ b/clang/test/Driver/spirv-toolchain.cl
@@ -80,10 +80,15 @@
 
 //-----------------------------------------------------------------------------
 // Check llvm-spirv-<LLVM_VERSION_MAJOR> is used if it is found in PATH.
+//
+// This test uses the PATH environment variable; on Windows, we may need to retain
+// the original path for the built Clang binary to be able to execute (as it is
+// used for locating dependent DLLs). Therefore, skip this test on system-windows.
+//
 // RUN: mkdir -p %t/versioned
 // RUN: touch %t/versioned/llvm-spirv-%llvm-version-major \
 // RUN:   && chmod +x %t/versioned/llvm-spirv-%llvm-version-major
-// RUN: env "PATH=%t/versioned" %clang -### --target=spirv64 -x cl -c %s 2>&1 \
-// RUN:   | FileCheck -DVERSION=%llvm-version-major --check-prefix=VERSIONED %s
+// RUN: %if !system-windows %{ env "PATH=%t/versioned" %clang -### --target=spirv64 -x cl -c %s 2>&1 \
+// RUN:   | FileCheck -DVERSION=%llvm-version-major --check-prefix=VERSIONED %s %}
 
 // VERSIONED: {{.*}}llvm-spirv-[[VERSION]]