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Author SHA1 Message Date
Fangrui Song dbc96b518b Revert "[CodeGenModule] Assume dso_local for -fpic -fno-semantic-interposition" 
This reverts commit 789a46f2d7.

Accidentally committed.
 2020-02-03 10:09:39 -08:00
Fangrui Song 789a46f2d7 [CodeGenModule] Assume dso_local for -fpic -fno-semantic-interposition 
Summary:
Clang -fpic defaults to -fno-semantic-interposition (GCC -fpic defaults
to -fsemantic-interposition).
Users need to specify -fsemantic-interposition to get semantic
interposition behavior.

Semantic interposition is currently a best-effort feature. There may
still be some cases where it is not handled well.

Reviewers: peter.smith, rnk, serge-sans-paille, sfertile, jfb, jdoerfert

Subscribers: dschuff, jyknight, dylanmckay, nemanjai, jvesely, kbarton, fedor.sergeev, asb, rbar, johnrusso, simoncook, sabuasal, niosHD, jrtc27, zzheng, edward-jones, atanasyan, rogfer01, MartinMosbeck, brucehoult, the_o, arphaman, PkmX, jocewei, jsji, Jim, lenary, s.egerton, pzheng, sameer.abuasal, apazos, luismarques, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D73865
 2020-02-03 09:52:48 -08:00
Lewis Revill af22e071ca [RISCV] Mark TLS as supported 
Inform Clang that TLS is implemented by LLVM for RISC-V

Differential Revision: https://reviews.llvm.org/D57055

llvm-svn: 363776
 2019-06-19 08:53:46 +00:00
Richard Smith 1847baa20e Don't emit _ZTW wrappers for TLS variables which don't use the C++ thread_local keyword. 
llvm-svn: 180004
 2013-04-22 08:06:17 +00:00
Hans Wennborg d3b01bc7c6 Support the tls_model attribute (PR9788) 
This adds support for the tls_model attribute. This allows the user to
choose a TLS model that is better than what LLVM would select by
default. For example, a variable might be declared as:

  __thread int x __attribute__((tls_model("initial-exec")));

if it will not be used in a shared library that is dlopen'ed.

This depends on LLVM r159077.

llvm-svn: 159078
 2012-06-23 11:51:46 +00:00
Eric Christopher c629a5c7d0 FileCheckize. 
llvm-svn: 120648
 2010-12-02 02:30:43 +00:00
Eric Christopher 6ff7161d51 Thread local variables aren't considered common linkage. 
llvm-svn: 110530
 2010-08-08 01:37:14 +00:00
Daniel Dunbar 8fbe78f6fc Update tests to use %clang_cc1 instead of 'clang-cc' or 'clang -cc1'. 
- This is designed to make it obvious that %clang_cc1 is a "test variable"
   which is substituted. It is '%clang_cc1' instead of '%clang -cc1' because it
   can be useful to redefine what gets run as 'clang -cc1' (for example, to set
   a default target).

llvm-svn: 91446
 2009-12-15 20:14:24 +00:00
Eli Friedman daea3f62b5 Print an error for uses of __thread on targets which don't support it. 
llvm-svn: 69553
 2009-04-19 21:48:33 +00:00
Eli Friedman 4f856744e5 PR3853: Add CodeGen support for __thread. 
llvm-svn: 69545
 2009-04-19 21:05:03 +00:00