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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
Erich Keane 2fe684bb14 Allow attributes before union definition 
permits typedef union __attribute__((transparent_union)) {...}

Differential Revision: https://reviews.llvm.org/D28266

llvm-svn: 296518
 2017-02-28 20:44:39 +00:00
Reid Kleckner b1be683074 Fix IRGen for passing transparent unions 
We have had a test for this for a long time with a FIXME saying what we
should be doing. This just does it.

Fixes PR21573.

llvm-svn: 222074
 2014-11-15 01:41:41 +00:00
Stephen Lin 4362261b00 CHECK-LABEL-ify some code gen tests to improve diagnostic experience when tests fail. 
llvm-svn: 188447
 2013-08-15 06:47:53 +00:00
Bill Wendling 48939ced20 Update testcases due to Attribute sorting improvements. 
llvm-svn: 175253
 2013-02-15 05:25:49 +00:00
Bill Wendling 85ab57ac5d Update the tests. 
This update coincides with r174110. That change ordered the attributes
alphabetically.

llvm-svn: 174111
 2013-01-31 23:17:12 +00:00
Chris Lattner 73e3004e75 fix an unintended behavior change in the type system rewrite, which caused us to compile 
stuff like this:

typedef struct {
 int x, y, z; 
} foo_t;

foo_t g;

into:
%"struct.<anonymous>" = type { i32, i32, i32 }
we now get:
%struct.foo_t = type { i32, i32, i32 }

This doesn't change the behavior of the compiler, but makes the IR much easier to read.

llvm-svn: 134969
 2011-07-12 05:53:08 +00:00
Chris Lattner a5f58b05e8 clang side to match the LLVM IR type system rewrite patch. 
llvm-svn: 134831
 2011-07-09 17:41:47 +00:00
Chris Lattner e76b95ae15 make the x86-32 backend specify a byval alignment, even when the 
code generator will do it.  With this patch, clang compiles the example
in PR9794 to not have an alloca temporary.

llvm-svn: 131881
 2011-05-22 23:35:00 +00:00
Anders Carlsson 0c75b49dc1 Fix a (probably very old) regression where we weren't using the typedef name for anonymous tag types. 
llvm-svn: 120113
 2010-11-24 21:05:09 +00:00
Peter Collingbourne a99fdcf93e Implement GNU C extension: two types are compatible if they appear 
as a function argument, one of the types is a transparent union type
and the other type is compatible with a union member

llvm-svn: 117243
 2010-10-24 18:30:18 +00:00
Daniel Dunbar 60785eb0f2 Sema/transparent_union: Make sure to add implicit cast when constructing 
implicit union values for the transparent_union extension.

llvm-svn: 114236
 2010-09-17 23:21:43 +00:00