[CIR] Fix for __atomic_compare_exchange weak arg #721
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ClangIR was failing on ``` __atomic_compare_exchange_n(&a, &old, 42, true, 5, 5); ``` The `true` was the problem. It would work with a literal `0` or `1`, but not with a literal `true` or `false`. The bug was in `isCstWeak` in CIRGenAtomic.cpp, which was only looking for an integral constant. It didn't recognize a boolean constant and was falling back on the non-constant path, which isn't implemented yet. Rewrite `isCstWeak` to check for both intergral and boolean constants.
bcardosolopes
approved these changes
Jul 8, 2024
Change some, but not all of the __atomic_compare_exchange tests to use boolean literals instead of integer literals for the "weak" argument. This provides test coverage for a recent fix to CodeGen of the "weak" argument.
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Test case added. Some, but not all, of the existing |
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ClangIR was failing on
The
truewas the problem. It would work with a literal0or1, but not with a literaltrueorfalse.The bug was in
isCstWeakin CIRGenAtomic.cpp, which was only looking for an integral constant. It didn't recognize a boolean constant and was falling back on the non-constant path, which isn't implemented yet.Rewrite
isCstWeakto check for both intergral and boolean constants.