d41445113b
CUDA/HIP determines whether a function can be called based on the device/host attributes of callee and caller. Clang assumes the caller is CurContext. This is correct in most cases, however, it is not correct in OpenMP parallel region when CUDA/HIP program is compiled with -fopenmp. This causes incorrect overloading resolution and missed diagnostics. To get the correct caller, clang needs to chase the parent chain of DeclContext starting from CurContext until a function decl or a lambda decl is reached. Sema API is adapted to achieve that and used to determine the caller in hostness check. Reviewed by: Artem Belevich, Richard Smith Differential Revision: https://reviews.llvm.org/D121765
20 lines
648 B
Plaintext
20 lines
648 B
Plaintext
// RUN: %clang_cc1 -fopenmp -fsyntax-only -verify %s
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#include "Inputs/cuda.h"
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__device__ void foo(int) {} // expected-note {{candidate function not viable: call to __device__ function from __host__ function}}
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// expected-note@-1 {{'foo' declared here}}
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int main() {
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#pragma omp parallel
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for (int i = 0; i < 100; i++)
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foo(1); // expected-error {{no matching function for call to 'foo'}}
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auto Lambda = []() {
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#pragma omp parallel
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for (int i = 0; i < 100; i++)
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foo(1); // expected-error {{reference to __device__ function 'foo' in __host__ __device__ function}}
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};
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Lambda(); // expected-note {{called by 'main'}}
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}
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