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Add an implementation of thunks for varargs methods. The implementation is a bit messy, but it is correct as long as the method in question doesn't use indirect gotos. A couple of possible alternative implementations are outlined in FIXME's in this patch. rdar://problem/8077308 .

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llvm-svn: 130993
This commit is contained in:
Eli Friedman
2011-05-06 17:27:27 +00:00
parent aab77fe574
commit 49a94b1c7c
4 changed files with 180 additions and 49 deletions
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15
clang/lib/CodeGen/CodeGenModule.cpp
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@@ -793,14 +793,19 @@ void CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) {
return;
if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) {
// Make sure to emit the definition(s) before we emit the thunks.
// This is necessary for the generation of certain thunks.
if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(Method))
EmitCXXConstructor(CD, GD.getCtorType());
else if (const CXXDestructorDecl *DD =dyn_cast<CXXDestructorDecl>(Method))
EmitCXXDestructor(DD, GD.getDtorType());
else
EmitGlobalFunctionDefinition(GD);
if (Method->isVirtual())
getVTables().EmitThunks(GD);
if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(Method))
return EmitCXXConstructor(CD, GD.getCtorType());
if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(Method))
return EmitCXXDestructor(DD, GD.getDtorType());
return;
}
return EmitGlobalFunctionDefinition(GD);