Auto merge of #3432 - RalfJung:gc-stress, r=RalfJung

run GC stress test only for host tests

I suspect these are a significant contributor to our Linux CI job being by far the slowest currently. Let's see.

We have Linux, Windows, and macOS hosts so all major OSes are still covered.

Author: bors

src/tools/miri/ci/ci.sh

@@ -46,8 +46,8 @@ function run_tests {
   fi
 
   ## ui test suite
-  # On the host and on Linux, also stress-test the GC.
-  if [ -z "${MIRI_TEST_TARGET:-}" ] || [ "$HOST_TARGET" = x86_64-unknown-linux-gnu ]; then
+  # On the host, also stress-test the GC.
+  if [ -z "${MIRI_TEST_TARGET:-}" ]; then
     MIRIFLAGS="${MIRIFLAGS:-} -Zmiri-provenance-gc=1" ./miri test
   else
     ./miri test
@@ -130,6 +130,8 @@ case $HOST_TARGET in
     MIRI_TEST_TARGET=aarch64-unknown-linux-gnu run_tests
     MIRI_TEST_TARGET=aarch64-apple-darwin run_tests
     MIRI_TEST_TARGET=i686-pc-windows-gnu run_tests
+    MIRI_TEST_TARGET=x86_64-pc-windows-gnu run_tests
+    MIRI_TEST_TARGET=arm-unknown-linux-gnueabi run_tests
     # Some targets are only partially supported.
     MIRI_TEST_TARGET=x86_64-unknown-freebsd run_tests_minimal hello integer vec panic/panic concurrency/simple pthread-threadname libc-getentropy libc-getrandom libc-misc libc-fs atomic env align num_cpus
     MIRI_TEST_TARGET=i686-unknown-freebsd run_tests_minimal hello integer vec panic/panic concurrency/simple pthread-threadname libc-getentropy libc-getrandom libc-misc libc-fs atomic env align num_cpus
@@ -145,9 +147,7 @@ case $HOST_TARGET in
     MIRI_TEST_TARGET=x86_64-pc-windows-msvc run_tests
     ;;
   i686-pc-windows-msvc)
-    MIRI_TEST_TARGET=arm-unknown-linux-gnueabi run_tests
     MIRI_TEST_TARGET=x86_64-unknown-linux-gnu run_tests
-    MIRI_TEST_TARGET=x86_64-pc-windows-gnu run_tests
     ;;
   *)
     echo "FATAL: unknown OS"