[Sema][SYCL] Only defer device diags for constexpr var init under SYCL#22767
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wenju-he wants to merge 1 commit into
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[Sema][SYCL] Only defer device diags for constexpr var init under SYCL#22767wenju-he wants to merge 1 commit into
wenju-he wants to merge 1 commit into
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InConstexprVarInit gates a mechanism (added for SYCL's "manifestly constant-evaluated" device-code exemption) that reroutes deferred device diagnostics into MaybeDeviceDeferredDiags, discarding them if the variable turns out to be constant-initialized. It was originally opt-in via LangOpts.SYCLAllowAllFeaturesInConstexpr (added in fa62920), but 10fee97 ("[SYCL][clang] Always lift SYCL device code restrictions in constant expressions") made it unconditional for any constexpr-capable global/static variable initializer, so it also swallowed CUDA/HIP deferred diagnostics (e.g. AMDGPU builtin argument checks) raised while initializing a global constexpr lambda, since SemaBase::SemaDiagnosticBuilder routes to whichever map InConstexprVarInit currently selects regardless of which DiagIfDeviceCode caller (SYCL or CUDA) created the deferred diagnostic. Restrict it to SYCL device compilation, its only real consumer (SemaSYCL::DiagIfDeviceCode). Fix clang/test/SemaHIP/amdgpu-builtin-in-lambda.hip CMPLRLLVM-77209 Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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InConstexprVarInit gates a mechanism (added for SYCL's "manifestly constant-evaluated" device-code exemption) that reroutes deferred device diagnostics into MaybeDeviceDeferredDiags, discarding them if the variable turns out to be constant-initialized. It was originally opt-in via LangOpts.SYCLAllowAllFeaturesInConstexpr (added in fa62920), but 10fee97 ("[SYCL][clang] Always lift SYCL device code restrictions in constant expressions") made it unconditional for any constexpr-capable global/static variable initializer, so it also swallowed CUDA/HIP deferred diagnostics (e.g. AMDGPU builtin argument checks) raised while initializing a global constexpr lambda, since SemaBase::SemaDiagnosticBuilder routes to whichever map InConstexprVarInit currently selects regardless of which DiagIfDeviceCode caller (SYCL or CUDA) created the deferred diagnostic. Restrict it to SYCL device compilation, its only real consumer (SemaSYCL::DiagIfDeviceCode).
Fix clang/test/SemaHIP/amdgpu-builtin-in-lambda.hip CMPLRLLVM-77209