Add feature flag for relaxed atomics - #8192
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| ;; NOTE: This test was ported using port_passes_tests_to_lit.py and could be cleaned up. | ||
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| ;; RUN: foreach %s %t wasm-opt --safe-heap --enable-threads --enable-simd --enable-memory64 -S -o - | filecheck %s | ||
| ;; RUN: foreach %s %t wasm-opt --safe-heap --enable-threads --enable-simd --enable-memory64 --enable-relaxed-atomics -S -o - | filecheck %s |
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Rather than adding relaxed-atomics to each of these files, let's make a new file that enables just relaxed atomics.
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I don't understand, this test wouldn't pass without --enabled-relaxed-atomics because --safe-heap combined with --enable-threads will cause us to generate safe heap methods that use acqrel ordering (which the next PR fixes but we need this PR first). In the next PR #8193 I add an equivalent test without --enable-relaxed-atomics to show that the acqrel methods aren't added. Also we anyway need a test that enables both relaxed atomics and safe heap to show that the safe acqrel methods are added.
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I see. LGTM to land this as-is because of the dependencies between PRs. I think ultimately we don't need to have more than one SafeHeap test that enables relaxed-atomics, though. (Also we can make the test file names much shorter now that they are lit tests.)
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Part of #8165. Add flag for --enable-relaxed atomics and enable it for the existing SafeHeap tests that previously implicitly depended on it. The next PR #8193 disables generation of AcqRel SafeHeap functions when the feature is disabled and adds new tests to cover that case.
Also validate that the feature is enabled when a module includes an AcqRel load operation (currently the only one we support).