diff options
| author | Richard Smith <richard@metafoo.co.uk> | 2021-10-08 19:06:22 -0700 |
|---|---|---|
| committer | Richard Smith <richard@metafoo.co.uk> | 2021-10-08 19:59:42 -0700 |
| commit | 7eae8c6e62b2a91e71aade19324b9d2242bcb4ab (patch) | |
| tree | 634f8db5d66290354a8dd04e1284de2742dfdf81 /clang/lib/CodeGen/CGClass.cpp | |
| parent | 85e565898ff36e5e50ff6e7ed6bf82b1cfbf89d6 (diff) | |
| download | llvm-7eae8c6e62b2a91e71aade19324b9d2242bcb4ab.zip llvm-7eae8c6e62b2a91e71aade19324b9d2242bcb4ab.tar.gz llvm-7eae8c6e62b2a91e71aade19324b9d2242bcb4ab.tar.bz2 | |
Don't update the vptr at the start of the destructor of a final class.
In this case, we know statically that we're destroying the most-derived
class, so the vptr must already point to the current class and never
needs to be updated.
Diffstat (limited to 'clang/lib/CodeGen/CGClass.cpp')
| -rw-r--r-- | clang/lib/CodeGen/CGClass.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/clang/lib/CodeGen/CGClass.cpp b/clang/lib/CodeGen/CGClass.cpp index 828dd71..0df64d4 100644 --- a/clang/lib/CodeGen/CGClass.cpp +++ b/clang/lib/CodeGen/CGClass.cpp @@ -1424,6 +1424,11 @@ static bool CanSkipVTablePointerInitialization(CodeGenFunction &CGF, if (!ClassDecl->isDynamicClass()) return true; + // For a final class, the vtable pointer is known to already point to the + // class's vtable. + if (ClassDecl->isEffectivelyFinal()) + return true; + if (!Dtor->hasTrivialBody()) return false; |