[PATCH] D95911: [Docs] Add some documentation for constructor homing, a debug info optimization (-fuse-ctor-homing)

[Amy Huang via Phabricator via cfe-commits]

This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG26e9c99010b6: [Docs] Add some documentation for constructor homing, a debug info optimization… (authored by akhuang).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D95911/new/

https://reviews.llvm.org/D95911

Files:
  clang/docs/UsersManual.rst


Index: clang/docs/UsersManual.rst
===================================================================
--- clang/docs/UsersManual.rst
+++ clang/docs/UsersManual.rst
@@ -2504,6 +2504,18 @@
    **-fno-standalone-debug** option can be used to get to turn on the
    vtable-based optimization described above.
 
+.. option:: -fuse-ctor-homing
+
+   This optimization is similar to the optimizations that are enabled as part
+   of -fno-standalone-debug. Here, Clang only emits type info for a
+   non-trivial, non-aggregate C++ class in the modules that contain a
+   definition of one of its constructors. This relies on the additional
+   assumption that all classes that are not trivially constructible have a
+   non-trivial constructor that is used somewhere.
+
+   This flag is not enabled by default, and needs to be used with -cc1 or
+   -Xclang.
+
 .. option:: -g
 
   Generate complete debug info.


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D95911.321245.patch
Type: text/x-patch
Size: 903 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/cfe-commits/attachments/20210203/9dbafe4c/attachment.bin>