[GR-46498] Do not pass invalid -XX flags to Native Image in clone-uninitialized-checks

PullRequest: truffleruby/4010

Author: eregon

test/truffle/compiler/clone-uninitialized-checks.sh

@@ -5,4 +5,4 @@ source test/truffle/common.sh.inc
 export TRUFFLERUBY_CHECK_PREINITIALIZED_SPEC=false
 
 # --always-clone-all covers more than just --core-always-clone, but is much slower (6 min vs 1 min)
-jt test fast -- --vm.XX:-UseJVMCICompiler --engine.Compilation=false --core-always-clone --check-clone-uninitialized-correctness
+JT_SPECS_COMPILATION=false JT_SPECS_SPLITTING=true jt test fast -- --core-always-clone --check-clone-uninitialized-correctness

tool/jt.rb

@@ -61,6 +61,7 @@
 
 JT_PROFILE_SUBCOMMANDS = ENV['JT_PROFILE_SUBCOMMANDS'] == 'true'
 JT_SPECS_COMPILATION = ENV['JT_SPECS_COMPILATION'] == 'false' ? false : true
+JT_SPECS_SPLITTING = ENV['JT_SPECS_SPLITTING'] == 'true' ? true : JT_SPECS_COMPILATION
 
 # Expand GEM_HOME relative to cwd so it cannot be misinterpreted later.
 ENV['GEM_HOME'] = File.expand_path(ENV['GEM_HOME']) if ENV['GEM_HOME']
@@ -1687,7 +1688,8 @@ def mspec(*args)
     vm_args, ruby_args, parsed_options = ruby_options({}, ['--reveal', *ruby_args])
 
     if !JT_SPECS_COMPILATION && truffleruby_compiler? && truffleruby_jvm?
-      vm_args << '--vm.XX:-UseJVMCICompiler' << '--engine.Compilation=false' << '--engine.Splitting=false'
+      vm_args << '--vm.XX:-UseJVMCICompiler' << '--engine.Compilation=false'
+      vm_args << '--engine.Splitting=false' unless JT_SPECS_SPLITTING
     end