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llvm-project/clang/test/CodeGen/wasm-export-name.c

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[WebAssembly] Add new `export_name` clang attribute for controlling wasm export names This is equivalent to the existing `import_name` and `import_module` attributes which control the import names in the final wasm binary produced by lld. This maps the existing This attribute currently requires a string rather than using the symbol name for a couple of reasons: 1. Avoid confusion with static and dynamic linking which is based on symbol name. Exporting a function from a wasm module using this directive is orthogonal to both static and dynamic linking. 2. Avoids name mangling. Differential Revision: https://reviews.llvm.org/D70520
2019-11-06 02:15:56 +08:00
// RUN: %clang_cc1 -triple wasm32-unknown-unknown-wasm -emit-llvm -o - %s | FileCheck %s
int __attribute__((export_name("bar"))) foo(void);
int foo(void) {
return 43;
}
[WebAssembly] Setting export_name implies llvm.used This change updates the clang front end to add symbols to llvm.used when they have explicit export_name attribute. Differential Revision: https://reviews.llvm.org/D71493
2019-12-14 06:44:06 +08:00
// CHECK: @llvm.used = appending global [1 x i8*] [i8* bitcast (i32 ()* @foo to i8*)]
[WebAssembly] Add new `export_name` clang attribute for controlling wasm export names This is equivalent to the existing `import_name` and `import_module` attributes which control the import names in the final wasm binary produced by lld. This maps the existing This attribute currently requires a string rather than using the symbol name for a couple of reasons: 1. Avoid confusion with static and dynamic linking which is based on symbol name. Exporting a function from a wasm module using this directive is orthogonal to both static and dynamic linking. 2. Avoids name mangling. Differential Revision: https://reviews.llvm.org/D70520
2019-11-06 02:15:56 +08:00
// CHECK: define i32 @foo() [[A:#[0-9]+]]
// CHECK: attributes [[A]] = {{{.*}} "wasm-export-name"="bar" {{.*}}}