add comment regarding __gxx_wasm_personality_v0

rust-lang · bors · Jun 30, 2023 · May 1, 2023 · May 1, 2023 · May 7, 2023
commit 12ad6622add9246e37ba22f5c3f1f0d212806559
diff --git a/compiler/rustc_codegen_llvm/src/context.rs b/compiler/rustc_codegen_llvm/src/context.rs
@@ -536,6  536,10 @@ impl<'ll, 'tcx> MiscMethods<'tcx> for CodegenCx<'ll, 'tcx> {
         let name = if wants_msvc_seh(self.sess()) {
             Some("__CxxFrameHandler3")
         } else if wants_wasm_eh(self.sess()) {
             // LLVM specifically tests for the name of the personality function
             // There is no need for this function to exist anywhere, it will
             // not be called. However, its name has to be "__gxx_wasm_personality_v0"
             // for native wasm exceptions.
             Some("__gxx_wasm_personality_v0")
         } else {
             None