[libc-commits] [PATCH] D90900: [libc][WrapperGen] Replace the C _Noreturn annotation with C++ [[noreturn]].

[Siva Chandra via Phabricator via libc-commits]

This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG573ade4bef00: [libc][WrapperGen] Replace the C _Noreturn annotation with C++ [[noreturn]]. (authored by sivachandra).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D90900/new/

https://reviews.llvm.org/D90900

Files:
  libc/utils/tools/WrapperGen/Main.cpp


Index: libc/utils/tools/WrapperGen/Main.cpp
===================================================================
--- libc/utils/tools/WrapperGen/Main.cpp
+++ libc/utils/tools/WrapperGen/Main.cpp
@@ -38,8 +38,18 @@
   llvm::Record *FunctionSpec = NameSpecPair.second;
   llvm::Record *RetValSpec = FunctionSpec->getValueAsDef("Return");
   llvm::Record *ReturnType = RetValSpec->getValueAsDef("ReturnType");
-  OS << "extern \"C\" " << Indexer.getTypeAsString(ReturnType) << " "
-     << FunctionName << "(";
+  std::string ReturnTypeString = Indexer.getTypeAsString(ReturnType);
+  bool ShouldReturn = true;
+  // We are generating C wrappers in C++ code. So, we should convert the C
+  // _Noreturn to the C++ [[noreturn]].
+  llvm::StringRef NR("_Noreturn "); // Note the space after _Noreturn
+  llvm::StringRef RT(ReturnTypeString);
+  if (RT.startswith(NR)) {
+    RT = RT.drop_front(NR.size() - 1); // - 1 because of the space.
+    ReturnTypeString = std::string("[[noreturn]]") + std::string(RT);
+    ShouldReturn = false;
+  }
+  OS << "extern \"C\" " << ReturnTypeString << " " << FunctionName << "(";
 
   auto ArgsList = FunctionSpec->getValueAsListOfDefs("Args");
   std::stringstream CallArgs;
@@ -73,8 +83,8 @@
   // match the standard types. Either handle such differences here, or
   // avoid such a thing in the implementations.
   OS << ") {\n"
-     << "  return __llvm_libc::" << FunctionName << "(" << CallArgs.str()
-     << ");\n"
+     << "  " << (ShouldReturn ? "return " : "")
+     << "__llvm_libc::" << FunctionName << "(" << CallArgs.str() << ");\n"
      << "}\n";
 
   return false;


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D90900.303510.patch
Type: text/x-patch
Size: 1615 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/libc-commits/attachments/20201106/256396ec/attachment.bin>