llvm-project/clang/test/CodeGen/WebAssembly/wasm-main_argc_argv.c

// RUN: %clang_cc1 -triple wasm32 -o - -emit-llvm %s | FileCheck %s

// Mangle the argc/argv form of main.

int main(int argc, char **argv) {
  return 0;
}

// CHECK-LABEL: define i32 @__main_argc_argv(i32 noundef %argc, i8** noundef %argv)
[WebAssembly] Mangle the argc/argv `main` as `__wasm_argc_argv`. 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 2019-11-26 01:50:58 +08:00			`// RUN: %clang_cc1 -triple wasm32 -o - -emit-llvm %s \| FileCheck %s`

			`// Mangle the argc/argv form of main.`

			`int main(int argc, char **argv) {`
			`return 0;`
			`}`

[Clang/Test]: Rename enable_noundef_analysis to disable-noundef-analysis and turn it off by default Turning on `enable_noundef_analysis` flag allows better codegen by removing freeze instructions. I modified clang by renaming `enable_noundef_analysis` flag to `disable-noundef-analysis` and turning it off by default. Test updates are made as a separate patch: D108453 Reviewed By: eugenis Differential Revision: https://reviews.llvm.org/D105169 2022-01-16 17:53:11 +08:00			`// CHECK-LABEL: define i32 @__main_argc_argv(i32 noundef %argc, i8** noundef %argv)`