[libc] Fix WrapperGen seeing no arguments as a void argument.
This corrects WrapperGen generating incorrect wrappers for functions
that take no arguments. Previously it would generate a wrapper with a
single argument of type `void`.
Reviewed By: sivachandra
Differential Revision: https://reviews.llvm.org/D90800
GitOrigin-RevId: 5c801de13cc2b615e2248be9845190bd1f5ef60f
diff --git a/utils/tools/WrapperGen/Main.cpp b/utils/tools/WrapperGen/Main.cpp
index ae606d1..0b064bc 100644
--- a/utils/tools/WrapperGen/Main.cpp
+++ b/utils/tools/WrapperGen/Main.cpp
@@ -47,6 +47,20 @@
for (size_t i = 0; i < ArgsList.size(); ++i) {
llvm::Record *ArgType = ArgsList[i]->getValueAsDef("ArgType");
auto TypeName = Indexer.getTypeAsString(ArgType);
+
+ if (TypeName.compare("void") == 0) {
+ if (ArgsList.size() == 1) {
+ break;
+ } else {
+ // the reason this is a fatal error is that a void argument means this
+ // function has no arguments; multiple copies of no arguments is an
+ // error.
+ llvm::PrintFatalError(
+ "The specification for function " + FunctionName +
+ " lists other arguments along with a void argument.");
+ }
+ }
+
OS << TypeName << " " << ArgPrefix << i;
CallArgs << ArgPrefix << i;
if (i < ArgsList.size() - 1) {
