Magic-Mirror/llvm-capstone
1
0
Fork 0
mirror of https://github.com/capstone-engine/llvm-capstone.git synced 2024-12-12 09:41:26 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Allow dynamic_cast to void* even with -fno-rtti.

Browse Source 
PR17346.

llvm-svn: 191340
This commit is contained in:
Eli Friedman 2013-09-24 23:21:41 +00:00
parent 1f5d8882f9
commit 3ce27103d9
2 changed files with 9 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
clang/lib/Sema/SemaCast.cpp
View File

@ -669,8 +669,10 @@ void CastOperation::CheckDynamicCast() {
Self.MarkVTableUsed(OpRange.getBegin(),
cast<CXXRecordDecl>(SrcRecord->getDecl()));
// dynamic_cast is not available with fno-rtti
if (!Self.getLangOpts().RTTI) {
// dynamic_cast is not available with -fno-rtti.
// As an exception, dynamic_cast to void* is available because it doesn't
// use RTTI.
if (!Self.getLangOpts().RTTI && !DestPointee->isVoidType()) {
Self.Diag(OpRange.getBegin(), diag::err_no_dynamic_cast_with_fno_rtti);
SrcExpr = ExprError();
return;

5
clang/test/SemaCXX/no-rtti.cpp
View File

@ -22,3 +22,8 @@ struct B : public A {
bool isa_B(A *a) {
return dynamic_cast<B *>(a) != 0; // expected-error {{cannot use dynamic_cast with -fno-rtti}}
}
void* getMostDerived(A* a) {
// This cast does not use RTTI.
return dynamic_cast<void *>(a);
}