[WebAssembly] EmscriptenEHSjLj: Mark more functions as imported

[sbc100]

Summary

This should have been part of https://reviews.llvm.org/D77192

[aheejin]

There seem to be several other places in which we use Function::Create in this file.. Should we mark all of them as imported as well?

[sbc100]

mark more

[sbc100]

PTAL. Should be complete now

[aheejin]

Thanks! LGTM.

llvm/test/CodeGen/WebAssembly/lower-em-sjlj.ll

318

Nit: delete one of the newlines?

llvm/lib/Target/WebAssembly/WebAssemblyLowerEmscriptenEHSjLj.cpp

 //=== WebAssemblyLowerEmscriptenEHSjLj.cpp - Lower exceptions for Emscripten =//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 ///
if (DoSjLj) {
     Changed = true; // We have setjmp or longjmp somewhere
 
     if (LongjmpF) {
       // Replace all uses of longjmp with emscripten_longjmp_jmpbuf, which is
       // defined in JS code
       EmLongjmpJmpbufF = Function::Create(LongjmpF->getFunctionType(),
                                           GlobalValue::ExternalLinkage,
                                           "emscripten_longjmp_jmpbuf", &M);
-
+      markAsImported(EmLongjmpJmpbufF);
       LongjmpF->replaceAllUsesWith(EmLongjmpJmpbufF);
     }
 
     if (SetjmpF) {
       // Register saveSetjmp function
       FunctionType *SetjmpFTy = SetjmpF->getFunctionType();
       FunctionType *FTy =
           FunctionType::get(Type::getInt32PtrTy(C),

llvm/test/CodeGen/WebAssembly/lower-em-sjlj.ll

 ; CHECK-DAG: declare void @"__invoke_void_%struct.__jmp_buf_tag*_i32"(void (%struct.__jmp_buf_tag*, i32)*, %struct.__jmp_buf_tag*, i32)
 
 attributes #0 = { returns_twice }
 attributes #1 = { noreturn }
 attributes #2 = { nounwind }
 attributes #3 = { allocsize(0) }
 ; CHECK: attributes #{{[0-9]+}} = { "wasm-import-module"="env" "wasm-import-name"="__invoke_void" }
 ; CHECK: attributes #{{[0-9]+}} = { "wasm-import-module"="env" "wasm-import-name"="__cxa_find_matching_catch_3" }
+; CHECK: attributes #{{[0-9]+}} = { "wasm-import-module"="env" "wasm-import-name"="emscripten_longjmp_jmpbuf" }
 ; CHECK: attributes #{{[0-9]+}} = { "wasm-import-module"="env" "wasm-import-name"="__invoke_i8*_i32_%struct.__jmp_buf_tag*" }
 ; CHECK: attributes #{{[0-9]+}} = { "wasm-import-module"="env" "wasm-import-name"="__invoke_void_%struct.__jmp_buf_tag*_i32" }
 ; CHECK: attributes #[[ALLOCSIZE_ATTR]] = { allocsize(1) }
 
 !llvm.dbg.cu = !{!2}
 !llvm.module.flags = !{!0}
 
 !0 = !{i32 2, !"Debug Info Version", i32 3}
 !1 = !DIFile(filename: "lower-em-sjlj.c", directory: "test")
 !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1)
 !3 = distinct !DISubprogram(name: "setjmp_debug_info", unit:!2, file: !1, line: 1)
 !4 = !DILocation(line:2, scope: !3)
 !5 = !DILocation(line:3, scope: !3)
 !6 = !DILocation(line:4, scope: !3)
 !7 = !DILocation(line:5, scope: !3)
 !8 = !DILocation(line:6, scope: !3)