no need to run GC_STRESS more than once for each OS

Author: RalfJung

src/tools/miri/ci/ci.sh

@@ -137,6 +137,7 @@ function run_tests_minimal {
 
 # In particular, fully cover all tier 1 targets.
 # We also want to run the many-seeds tests on all tier 1 targets.
+# We run GC_STRESS only once for each tier 1 OS.
 case $HOST_TARGET in
   x86_64-unknown-linux-gnu)
     # Host
@@ -147,7 +148,6 @@ case $HOST_TARGET in
     ;;
   i686-unknown-linux-gnu)
     # Host
-    # Without GC_STRESS as this is a slow runner.
     MIR_OPT=1 MANY_SEEDS=64 TEST_BENCH=1 CARGO_MIRI_ENV=1 run_tests
     # Partially supported targets (tier 2)
     BASIC="empty_main integer heap_alloc libc-mem vec string btreemap" # ensures we have the basics: pre-main code, system allocator
@@ -159,7 +159,7 @@ case $HOST_TARGET in
     ;;
   aarch64-unknown-linux-gnu)
     # Host
-    GC_STRESS=1 MIR_OPT=1 MANY_SEEDS=64 TEST_BENCH=1 CARGO_MIRI_ENV=1 run_tests
+    MIR_OPT=1 MANY_SEEDS=64 TEST_BENCH=1 CARGO_MIRI_ENV=1 run_tests
     # Extra tier 2
     MANY_SEEDS=16 TEST_TARGET=arm-unknown-linux-gnueabi run_tests # 32bit ARM
     MANY_SEEDS=16 TEST_TARGET=aarch64-pc-windows-gnullvm run_tests # gnullvm ABI
@@ -170,7 +170,7 @@ case $HOST_TARGET in
     ;;
   armv7-unknown-linux-gnueabihf)
     # Host
-    GC_STRESS=1 MIR_OPT=1 MANY_SEEDS=64 TEST_BENCH=1 CARGO_MIRI_ENV=1 run_tests
+    MIR_OPT=1 MANY_SEEDS=64 TEST_BENCH=1 CARGO_MIRI_ENV=1 run_tests
     # Custom target JSON file
     TEST_TARGET=tests/x86_64-unknown-kernel.json MIRI_NO_STD=1 run_tests_minimal no_std
     ;;
@@ -187,7 +187,6 @@ case $HOST_TARGET in
     ;;
   i686-pc-windows-msvc)
     # Host
-    # Without GC_STRESS as this is a very slow runner.
     MIR_OPT=1 MANY_SEEDS=64 TEST_BENCH=1 run_tests
     # Extra tier 1
     # We really want to ensure a Linux target works on a Windows host,
@@ -196,8 +195,7 @@ case $HOST_TARGET in
     ;;
   aarch64-pc-windows-msvc)
     # Host
-    # Without GC_STRESS as this is a very slow runner.
-    MIR_OPT=1 MANY_SEEDS=64 TEST_BENCH=1 CARGO_MIRI_ENV=1 run_tests
+    GC_STRESS=1 MIR_OPT=1 MANY_SEEDS=64 TEST_BENCH=1 CARGO_MIRI_ENV=1 run_tests
     # Extra tier 1
     MANY_SEEDS=64 TEST_TARGET=i686-unknown-linux-gnu run_tests
     ;;