Commit Graph

5 Commits

Author SHA1 Message Date
Luboš Luňák a45f713c67 add option to instantiate templates already in the PCH
Add -fpch-instantiate-templates which makes template instantiations be
performed already in the PCH instead of it being done in every single
file that uses the PCH (but every single file will still do it as well
in order to handle its own instantiations). I can see 20-30% build
time saved with the few tests I've tried.

The change may reorder compiler output and also generated code, but
should be generally safe and produce functionally identical code.
There are some rare cases that do not compile with it,
such as test/PCH/pch-instantiate-templates-forward-decl.cpp. If
template instantiation bailed out instead of reporting the error,
these instantiations could even be postponed, which would make them
work.

Enable this by default for clang-cl. MSVC creates PCHs by compiling
them using an empty .cpp file, which means templates are instantiated
while building the PCH and so the .h needs to be self-contained,
making test/PCH/pch-instantiate-templates-forward-decl.cpp to fail
with MSVC anyway. So the option being enabled for clang-cl matches this.

Differential Revision: https://reviews.llvm.org/D69585
2020-06-21 17:05:52 +02:00
Argyrios Kyrtzidis 794671dc2f [PCH] Fix crash with valid code, related to anonymous field initializers.
In a certain code-path we were not deserializing an anonymous field initializer correctly,
leading to a crash when trying to IRGen it.

This is a simpler version of a patch by Yunzhong Gao!

llvm-svn: 182974
2013-05-30 23:59:46 +00:00
Richard Smith 2b013185f8 PR13064: Store whether an in-class initializer uses direct or copy
initialization, and use that information to produce the right kind of
initialization during template instantiation.

llvm-svn: 158288
2012-06-10 03:12:00 +00:00
Richard Smith 9ca5c42582 Update all tests other than Driver/std.cpp to use -std=c++11 rather than
-std=c++0x. Patch by Ahmed Charles!

llvm-svn: 141900
2011-10-13 22:29:44 +00:00
Richard Smith 938f40b5aa Implement support for C++11 in-class initialization of non-static data members.
llvm-svn: 132878
2011-06-11 17:19:42 +00:00