b5a034e771
In order to support non-user-named kernels, SYCL needs some way in the integration headers to name the kernel object themselves. Initially, the design considered just RTTI naming of the lambdas, this results in a quite unstable situation in light of some device/host macros. Additionally, this ends up needing to use RTTI, which is a burden on the implementation and typically unsupported. Instead, we've introduced a builtin, __builtin_unique_stable_name, which takes a type or expression, and results in a constexpr constant character array that uniquely represents the type (or type of the expression) being passed to it. The implementation accomplishes that simply by using a slightly modified version of the Itanium Mangling. The one exception is when mangling lambdas, instead of appending the index of the lambda in the function, it appends the macro-expansion back-trace of the lambda itself in the form LINE->COL[~LINE->COL...]. Differential Revision: https://reviews.llvm.org/D76620
34 lines
1.0 KiB
C++
34 lines
1.0 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify -Wno-unused %s
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namespace NS{};
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void f(int var) {
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// expected-error@+1{{expected '(' after '__builtin_unique_stable_name'}}
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__builtin_unique_stable_name int;
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// expected-error@+1{{expected '(' after '__builtin_unique_stable_name'}}
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__builtin_unique_stable_name {int};
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__builtin_unique_stable_name(var);
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// expected-error@+1{{use of undeclared identifier 'bad_var'}}
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__builtin_unique_stable_name(bad_var);
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// expected-error@+1{{use of undeclared identifier 'bad'}}
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__builtin_unique_stable_name(bad::type);
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// expected-error@+1{{no member named 'still_bad' in namespace 'NS'}}
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__builtin_unique_stable_name(NS::still_bad);
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}
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template <typename T>
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void f2() {
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// expected-error@+1{{no member named 'bad_val' in 'S'}}
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__builtin_unique_stable_name(T::bad_val);
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// expected-error@+1{{no type named 'bad_type' in 'S'}}
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__builtin_unique_stable_name(typename T::bad_type);
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}
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struct S{};
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void use() {
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// expected-note@+1{{in instantiation of}}
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f2<S>();
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}
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