clang

Commit Graph

Author	SHA1	Message	Date
Reid Kleckner	8756959802	Use comdats to avoid double initialization of weak data Initializers of global data that can appear multiple TUs (static data members of class templates or __declspec(selectany) data) are now in a comdat group keyed on the global variable being initialized. On non-Windows platforms, this is a code size and startup time optimization. On Windows, this is necessary for ABI compatibility with MSVC. Fixes PR16959. Reviewers: rsmith Differential Revision: http://reviews.llvm.org/D3811 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@209555 91177308-0d34-0410-b5e6-96231b3b80d8	2014-05-23 21:13:45 +00:00
Nico Weber	afafe70f43	Include translation unit filename in global ctor symbol names. This makes it easier to see where a global ctor comes from, and it also makes ASan's init order analyzer output easier to understand. gcc does this too, but only in -fPIC mode for some reason. Don't do this for constructors with explicit init priority. Also prepend "sub_" before the 'I', that way regular constructors stay lexicographically after symbols with init priority (because ord('s') > ord('I')). gold seems to ignore the name of constructor symbols, and ld only looks at the symbol if it includes an init priority, which this patch doesn't change. Before: __GLOBAL_I_a Now: __GLOBAL_sub_I_myfile.cc git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@208128 91177308-0d34-0410-b5e6-96231b3b80d8	2014-05-06 20:32:45 +00:00
Benjamin Kramer	38d04e3098	test case hygiene. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@199017 91177308-0d34-0410-b5e6-96231b3b80d8	2014-01-11 21:22:35 +00:00
Anton Korobeynikov	4179ddd575	Implement codegen for init_priority attribute properly - make sure it works between the modules. No functionality change on Darwin/Windows. This fixes PR11480. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167496 91177308-0d34-0410-b5e6-96231b3b80d8	2012-11-06 22:44:45 +00:00

4 Commits