[llvm] [CI] Disable flang from Windows pre-commit tests (PR #93485)

[Renato Golin via llvm-commits]

https://github.com/rengolin created https://github.com/llvm/llvm-project/pull/93485

Flang tests are unstable on Windows pre-commit CI: https://discourse.llvm.org/t/flang-tests-are-extremely-slow-on-windows/78591/40

Potential timeout issue:
https://discourse.llvm.org/t/flang-tests-are-extremely-slow-on-windows/78591/42

Since there doesn't seem to be interest in the Flang community to fix this, we disable. This should only be re-enabled once the stability issues are proven to be fixed.

>From 03da2fae600cf6cddd39d52548b922e8ad320b22 Mon Sep 17 00:00:00 2001
From: Renato Golin <rengolin at systemcall.eu>
Date: Mon, 27 May 2024 17:54:58 +0100
Subject: [PATCH] [CI] Disable flang from Windows pre-commit tests

Flang tests are unstable on Windows pre-commit CI:
https://discourse.llvm.org/t/flang-tests-are-extremely-slow-on-windows/78591/40

Potential timeout issue:
https://discourse.llvm.org/t/flang-tests-are-extremely-slow-on-windows/78591/42

Since there doesn't seem to be interest in the Flang community to fix
this, we disable. This should only be re-enabled once the stability
issues are proven to be fixed.
---
 .ci/generate-buildkite-pipeline-premerge | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.ci/generate-buildkite-pipeline-premerge b/.ci/generate-buildkite-pipeline-premerge
index e1c66ac18e7ac..433b934f93f52 100755
--- a/.ci/generate-buildkite-pipeline-premerge
+++ b/.ci/generate-buildkite-pipeline-premerge
@@ -144,6 +144,7 @@ function exclude-windows() {
     cross-project-tests) ;; # tests failing
     compiler-rt)         ;; # tests taking too long
     openmp)              ;; # TODO: having trouble with the Perl installation
+    flang)               ;; # https://discourse.llvm.org/t/flang-tests-are-extremely-slow-on-windows/78591/40
     libc)                ;; # no Windows support
     lldb)                ;; # tests failing
     bolt)                ;; # tests are not supported yet