[PATCH] D28727: Add -fstrict-vtable-pointers to UserManual
Piotr Padlewski via Phabricator via cfe-commits
cfe-commits at lists.llvm.org
Mon Jan 16 05:31:09 PST 2017
This revision was automatically updated to reflect the committed changes.
Prazek marked an inline comment as done.
Closed by commit rL292112: Add -fstrict-vtable-pointers to UsersManual (authored by Prazek).
Changed prior to commit:
@@ -1097,6 +1097,13 @@
the behavior of sanitizers in the ``cfi`` group to allow checking
of cross-DSO virtual and indirect calls.
+.. option:: -fstrict-vtable-pointers
+ Enable optimizations based on the strict rules for overwriting polymorphic
+ C++ objects, i.e. the vptr is invariant during an object's lifetime.
+ This enables better devirtualization. Turned off by default, because it is
+ still experimental.
.. option:: -ffast-math
Enable fast-math mode. This defines the ``__FAST_MATH__`` preprocessor
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