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This commit implements support for WebAssembly table types and respective builtins. Table tables are WebAssembly objects to store reference types. They have a large amount of semantic restrictions including, but not limited to, only being allowed to be declared at the top-level as static arrays of zero-length. Not being arguments or result of functions, not being stored ot memory, etc. This commit introduces the __attribute__((wasm_table)) to attach to arrays of WebAssembly reference types. And the following builtins to manage tables: * ref __builtin_wasm_table_get(table, idx) * void __builtin_wasm_table_set(table, idx, ref) * uint __builtin_wasm_table_size(table) * uint __builtin_wasm_table_grow(table, ref, uint) * void __builtin_wasm_table_fill(table, idx, ref, uint) * void __builtin_wasm_table_copy(table, table, uint, uint, uint) This commit also enables reference-types feature at bleeding-edge. This is joint work with Alex Bradbury (@asb). Reviewed By: aaron.ballman Differential Revision: https://reviews.llvm.org/D139010
4 lines
218 B
C
4 lines
218 B
C
// RUN: %clang_cc1 -fsyntax-only -pedantic -verify=expected -triple wasm32 -Wno-unused-value -target-feature +reference-types %s
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// No error should be emitted.
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static __externref_t table[0]; // expected-no-diagnostics
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