00072c08c7
WebAssembly enforces a rule that caller and callee signatures must match. This means that the traditional technique of passing `main` `argc` and `argv` even when it doesn't need them doesn't work. Currently the backend renames `main` to `__original_main`, however this doesn't interact well with LTO'ing libc, and the name isn't intuitive. This patch allows us to transition to `__main_argc_argv` instead. This implements the proposal in https://github.com/WebAssembly/tool-conventions/pull/134 with a flag to disable it when targeting Emscripten, though this is expected to be temporary, as discussed in the proposal comments. Differential Revision: https://reviews.llvm.org/D70700
14 lines
273 B
C
14 lines
273 B
C
// RUN: %clang_cc1 -triple wasm32 -o - -emit-llvm %s | FileCheck %s
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// Mangle argc/argv main even when it's not defined in this TU.
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#include <stddef.h>
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int main(int argc, char *argv[]);
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int foo(void) {
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return main(0, NULL);
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}
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// CHECK: call i32 @__main_argc_argv(
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