Commit Graph

181 Commits

Author SHA1 Message Date
Rafael Espindola b0fc4cf3b9 Fix a gcc warning.
Thanks to Filipe Cabecinhas for the report.

llvm-svn: 220361
2014-10-22 02:23:31 +00:00
Rafael Espindola 2754dbb4ab Fix gcc warning in gold-plugin.cpp.
Patch by Markus Trippelsdorf!

llvm-svn: 219459
2014-10-10 00:48:13 +00:00
Rafael Espindola dfc7ed7ad0 gold plugin: Handle gold selecting a linkonce GV when a weak is present.
The plugin API doesn't have the notion of linkonce, only weak. It is up to the
plugin to figure out if a symbol used only for the symbol table can be dropped.
In particular, it has to avoid dropping a linkonce_odr selected by gold if there
is also a weak_odr.

llvm-svn: 219188
2014-10-07 04:06:13 +00:00
Rafael Espindola cb69583c50 gold plugin: create internal replacement with original linkage first.
The call to copyAttributesFrom will copy the visibility, which might assert
if it were to produce something invalid like "internal hidden". We avoid it
by first creating the replacement with the original linkage and then setting
it to internal affter the call to copyAttributesFrom.

llvm-svn: 219184
2014-10-07 03:19:55 +00:00
Rafael Espindola 93aec71ba9 gold plugin: Remap function arguments when creating a replacement function.
When creating an internal function replacement for use in an alias we were
not remapping the argument uses in the instructions to point to the new
arguments.

llvm-svn: 219177
2014-10-07 00:47:38 +00:00
Peter Collingbourne 10039c02ea LTO: introduce object file-based on-disk module format.
This format is simply a regular object file with the bitcode stored in a
section named ".llvmbc", plus any number of other (non-allocated) sections.

One immediate use case for this is to accommodate compilation processes
which expect the object file to contain metadata in non-allocated sections,
such as the ".go_export" section used by some Go compilers [1], although I
imagine that in the future we could consider compiling parts of the module
(such as large non-inlinable functions) directly into the object file to
improve LTO efficiency.

[1] http://golang.org/doc/install/gccgo#Imports

Differential Revision: http://reviews.llvm.org/D4371

llvm-svn: 218078
2014-09-18 21:28:49 +00:00
Rafael Espindola 51bd8ee309 Internalize common symbols when we can.
This fixes pr20974.

llvm-svn: 217981
2014-09-17 20:41:13 +00:00
Rafael Espindola c435adcde0 Add doInitialization/doFinalization to DataLayoutPass.
With this a DataLayoutPass can be reused for multiple modules.

Once we have doInitialization/doFinalization, it doesn't seem necessary to pass
a Module to the constructor.

Overall this change seems in line with the idea of making DataLayout a required
part of Module. With it the only way of having a DataLayout used is to add it
to the Module.

llvm-svn: 217548
2014-09-10 21:27:43 +00:00
Rafael Espindola 71143ed24b Remember to eraseFromParent after replaceAllUsesWith.
llvm-svn: 217536
2014-09-10 19:39:41 +00:00
Rafael Espindola 890db27b67 Handle common linkage correctly in the gold plugin.
This is the plugin version of pr20882.

This handles the case of every common symbol being in the IR. We will need some
support from gold to handle the case where some symbols are in ELF and some in
the IR.

llvm-svn: 217458
2014-09-09 20:08:22 +00:00
David Blaikie 10a27df8ff unique_ptrify IRObjectFile::createIRObjectFile
I took a guess at the changes to the gold plugin, because that doesn't
seem to build by default for me. Not sure what dependencies I might be
missing for that.

llvm-svn: 217056
2014-09-03 17:59:23 +00:00
Rafael Espindola 688121571a Pass a && to getLazyBitcodeModule.
This forces callers to use std::move when calling it. It is somewhat odd to have
code with std::move that doesn't always move, but it is also odd to have code
without std::move that sometimes moves.

llvm-svn: 217049
2014-09-03 17:31:46 +00:00
Rafael Espindola eeec8e63c0 Don't create a MemoryBuffer just to get the MemoryBufferRef. NFC.
llvm-svn: 216608
2014-08-27 20:25:55 +00:00
David Blaikie dfbe3d6b17 Convert a few more cases of direct intialization of unique_ptrs from MemoryBuffer::getMemBuffer to move initialization now that it returns by unique_ptr instead of raw pointer.
Cleanup/improvements following r216583.

llvm-svn: 216605
2014-08-27 20:14:18 +00:00
Rafael Espindola 3560ff2c1f Return a std::unique_ptr when creating a new MemoryBuffer.
llvm-svn: 216583
2014-08-27 20:03:13 +00:00
Rafael Espindola e2c1d77fb4 Pass a std::unique_ptr<MemoryBuffer>& to getLazyBitcodeModule.
By taking a reference we can do the ownership transfer in one place instead of
expecting every caller to do it.

llvm-svn: 216492
2014-08-26 22:00:09 +00:00
Rafael Espindola 3fd1e9933f Modernize raw_fd_ostream's constructor a bit.
Take a StringRef instead of a "const char *".
Take a "std::error_code &" instead of a "std::string &" for error.

A create static method would be even better, but this patch is already a bit too
big.

llvm-svn: 216393
2014-08-25 18:16:47 +00:00
Rafael Espindola f7ecb11572 Add support for comdats to the gold plugin.
There are two parts to this. First, the plugin needs to tell gold the comdat by
setting comdat_key.

What gets things a bit more complicated is that gold only seems
symbols. In particular, if A is an alias to B, it only sees the symbols
A and B. It can then ask us to keep symbol A but drop symbol B. What
we have to do instead is to create an internal version of B and make A
an alias to that.

At some point some of this logic should be moved to lib/Linker so that
we don't map a Constant to an internal version just to have lib/Linker
map that again to the destination module.

The reason for implementing this in tools/gold for now is simplicity.
With it in place it should be possible to update clang to use comdats
for constructors and destructors on ELF without breaking the LTO
bootstrap. Once that is done I intend to come back and improve the
interface lib/Linker exposes.

llvm-svn: 216302
2014-08-22 23:26:10 +00:00
Rafael Espindola 33466a745e Rewrite the gold plugin to fix pr19901.
There is a fundamental difference between how the gold API and lib/LTO view
the LTO process.

The gold API talks about a particular symbol in a particular file. The lib/LTO
API talks about a symbol in the merged module.

The merged module is then defined in terms of the IR semantics. In particular,
a linkonce_odr GV is only copied if it is used, since it is valid to drop
unused linkonce_odr GVs.

In the testcase in pr19901 both properties collide. What happens is that gold
asks us to keep a particular linkonce_odr symbol, but the IR linker doesn't
copy it to the merged module and we never have a chance to ask lib/LTO to keep
it.

This patch fixes it by having a more direct implementation of the gold API. If
it asks us to keep a symbol, we change the linkage so it is not linkonce. If it
says we can drop a symbol, we do so. All of this before we even send the module
to lib/Linker.

Since now we don't have to produce LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN,
during symbol resolution we can use a temporary LLVMContext and do lazy
module loading. This allows us to keep the minimum possible amount of
allocated memory around. This should also allow as much parallelism as
we want, since there is no shared context.

llvm-svn: 216215
2014-08-21 20:28:55 +00:00
Rafael Espindola 55b3254ea2 Fix using -plugin-opt=apiflie when also using -plugin-opt=emit-llvm.
llvm-svn: 215378
2014-08-11 19:06:54 +00:00
Rafael Espindola 0c54419d5d Remove unused argument.
Thanks to Justin Bogner for noticing it.

llvm-svn: 214426
2014-07-31 19:32:04 +00:00
Rafael Espindola d2aac5795e Use range loops.
llvm-svn: 214280
2014-07-30 01:52:40 +00:00
Rafael Espindola 54f82b72cc Convert a few more function pointer calls to just "f()".
llvm-svn: 214276
2014-07-30 01:36:32 +00:00
Rafael Espindola b6393291b4 Don't duplicate the function name in a comment.
llvm-svn: 214272
2014-07-30 01:23:45 +00:00
Rafael Espindola 5ad21fa696 Use function pointers with just f(1,2) instead of (*f)(1,2).
llvm-svn: 214265
2014-07-30 00:38:58 +00:00
Rafael Espindola 176e664198 Use nullptr instead of NULL.
llvm-svn: 214229
2014-07-29 21:46:05 +00:00
Rafael Espindola a9716f8925 Remove unused includes.
llvm-svn: 214226
2014-07-29 21:38:05 +00:00
Rafael Espindola 9d2250ad43 Delete dead code.
The gold plugin doesn't call lseek or read directly any more.

llvm-svn: 214221
2014-07-29 21:09:43 +00:00
Rafael Espindola 6c472e5e14 gold plugin: Fix handling of corrupted bitcode files.
We should still claim them and tell gold about the error.

llvm-svn: 214214
2014-07-29 20:46:19 +00:00
Rafael Espindola 125b9244ca Small gold plugin simplifications.
* Use a range loop.
* Store the extra options as "const char *".

llvm-svn: 214199
2014-07-29 19:17:44 +00:00
Rafael Espindola 44cb242dda Use raw_fd_ostream instead of std::ofstream.
llvm-svn: 212483
2014-07-07 20:34:51 +00:00
Rafael Espindola adf21f2a56 Update the MemoryBuffer API to use ErrorOr.
llvm-svn: 212405
2014-07-06 17:43:13 +00:00
Rafael Espindola e54d821671 Declare variable on first use.
llvm-svn: 212403
2014-07-06 14:31:22 +00:00
Peter Collingbourne 1505c0a4be gold plugin: move target initialization to the top of the onload function.
On at least my machine, ar does not register an all symbols read hook (which
previously triggered target initialization), but it does register a claim
files hook, which depends on the targets being initialized.

Differential Revision: http://reviews.llvm.org/D4372

llvm-svn: 212303
2014-07-03 23:28:03 +00:00
Peter Collingbourne 63086fe166 LTO: rename the various makeLTOModule overloads.
This rename makes it easier to identify the specific overload being called
in each particular case and makes future refactorings easier.

Differential Revision: http://reviews.llvm.org/D4370

llvm-svn: 212302
2014-07-03 23:28:00 +00:00
Tom Roeder b508119fb6 Fix the new LTOCodeGenerator setup in gold to parse options before using MAttrs.
This fixes a regression that made clang -flto -Wl,--plugin-opt=-mattr=+aes not
pass the "+aes" option to the LTOCodeGenerator attributes.

llvm-svn: 211804
2014-06-26 20:43:27 +00:00
Rafael Espindola bfb8b9152b Small clanups:
Use static instead of anonymous namespace.
Delete write only variables.

llvm-svn: 211335
2014-06-20 01:37:35 +00:00
Rafael Espindola 562e0d8023 The gold plugin doesn't need disassemblers.
Back in r128440 tools/LTO started exporting the disassembler interface. It
was never clear why, but whatever the reason I am pretty sure it doesn't hold
for tools/gold.

llvm-svn: 211325
2014-06-19 23:06:53 +00:00
Rafael Espindola c273aac3a1 Set gold plugin options in a sane order.
This fixes the  processing of --plugin-opt=-jump-table-type=arity.

Nice properties:
 * We call InitTargetOptionsFromCodeGenFlags once.
 * We call parseCodeGenDebugOptions once.
 * It works :-)

llvm-svn: 211322
2014-06-19 22:54:47 +00:00
Rafael Espindola b201bfcbce Simplify. No functionality change.
Thanks to Alp Toker for noticing it.

llvm-svn: 211320
2014-06-19 22:33:23 +00:00
Rafael Espindola a0d30a9977 Reduce indentation. No functionality change.
llvm-svn: 211318
2014-06-19 22:20:07 +00:00
Rafael Espindola 6b244b1348 Use lib/LTO directly in the gold plugin.
The tools/lto API is not the best choice for implementing a gold plugin. Among
other issues:

* It is an stable ABI. Old errors stay and we have to be really careful
  before adding new features.
* It has to support two fairly different linkers: gold and ld64.
* We end up with a plugin that depends on a shared lib, something quiet
  unusual in LLVM land.
* It hides LLVM. For some features in the gold plugin it would be really
  nice to be able to just get a Module or a GlobalValue.

This change is intended to be a very direct translation from the C API. It
will just enable other fixes and cleanups.

Tested with a LTO bootstrap on linux.

llvm-svn: 211315
2014-06-19 21:14:13 +00:00
Rafael Espindola 64a86e5fc2 Remove an incorrect fixme.
dynamic-no-pic is just another output type. If gnu ld gets support for MachO,
it should also add something like LDPO_DYN_NO_PIC to the plugin interface.

llvm-svn: 211305
2014-06-19 19:45:25 +00:00
Rafael Espindola 4453e42945 Remove 'using std::error_code' from tools.
llvm-svn: 210876
2014-06-13 03:07:50 +00:00
Rafael Espindola 3acea39853 Don't use 'using std::error_code' in include/llvm.
This should make sure that most new uses use the std prefix.

llvm-svn: 210835
2014-06-12 21:46:39 +00:00
Rafael Espindola a6e9c3e43a Remove system_error.h.
This is a minimal change to remove the header. I will remove the occurrences
of "using std::error_code" in a followup patch.

llvm-svn: 210803
2014-06-12 17:38:55 +00:00
Ahmed Charles 56440fd820 Replace OwningPtr<T> with std::unique_ptr<T>.
This compiles with no changes to clang/lld/lldb with MSVC and includes
overloads to various functions which are used by those projects and llvm
which have OwningPtr's as parameters. This should allow out of tree
projects some time to move. There are also no changes to libs/Target,
which should help out of tree targets have time to move, if necessary.

llvm-svn: 203083
2014-03-06 05:51:42 +00:00
Sylvestre Ledru 539997978e Improve the declaration when LDPO_PIE is not available.
Thanks to İsmail Dönmez for the better declaration.

llvm-svn: 201163
2014-02-11 17:30:18 +00:00
Sylvestre Ledru 1515a48e14 If LDPO_PIE is not defined (before binutils 2.23 version),
use the hardcoded declaration 3
See r201110 for the initial change

llvm-svn: 201161
2014-02-11 17:11:32 +00:00
Rafael Espindola 76e376d30a Fix an old FIXME. LDPO_PIE is available since 2.23, realeased 2012-10-22.
llvm-svn: 201110
2014-02-10 20:38:38 +00:00
Chandler Carruth 07baed53e8 Re-sort #include lines again, prior to moving headers around.
llvm-svn: 199080
2014-01-13 08:04:33 +00:00
NAKAMURA Takumi 2e299d1cae gold-plugin.cpp: Use form of <plugin-api.h>, since it is external header.
llvm-svn: 197997
2013-12-25 02:24:38 +00:00
Rafael Espindola 282a47037b Use LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN instead of the "dso list".
There are two ways one could implement hiding of linkonce_odr symbols in LTO:
* LLVM tells the linker which symbols can be hidden if not used from native
  files.
* The linker tells LLVM which symbols are not used from other object files,
  but will be put in the dso symbol table if present.

GOLD's API is the second option. It was implemented almost 1:1 in llvm by
passing the list down to internalize.

LLVM already had partial support for the first option. It is also very similar
to how ld64 handles hiding these symbols when *not* doing LTO.

This patch then
* removes the APIs for the DSO list.
* marks LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN all linkonce_odr unnamed_addr
  global values and other linkonce_odr whose address is not used.
* makes the gold plugin responsible for handling the API mismatch.

llvm-svn: 193800
2013-10-31 20:51:58 +00:00
Rafael Espindola d578b69867 Check for errors when calling lto_codegen_add_module in the gold plugin.
Thanks to Milan Lenčo for noticing it.

llvm-svn: 192996
2013-10-18 19:32:06 +00:00
Rafael Espindola 143fc3b6ba [pr17595] Fix a use after free.
Destroying the codegen also frees the path of the created object. Copy the
path to a std::string.

llvm-svn: 192787
2013-10-16 12:47:04 +00:00
Rafael Espindola cda2911caa Optimize linkonce_odr unnamed_addr functions during LTO.
Generalize the API so we can distinguish symbols that are needed just for a DSO
symbol table from those that are used from some native .o.

The symbols that are only wanted for the dso symbol table can be dropped if
llvm can prove every other dso has a copy (linkonce_odr) and the address is not
important (unnamed_addr).

llvm-svn: 191922
2013-10-03 18:29:09 +00:00
Rafael Espindola fb7a0b8943 Dispose the codegen even when just writing the bitcode file.
This makes it possible to add timers to the code generator and still use them
with -plugin-opt=emit-llvm.

llvm-svn: 191866
2013-10-03 00:07:30 +00:00
Shuxin Yang 1826ae23ff Revert r188188 and r188200.
In order to appease people (in Apple) who accuse me for committing "huge change" (?) without proper review. 

Thank Eric for fixing a compile-warning. 

llvm-svn: 188204
2013-08-12 21:07:31 +00:00
Shuxin Yang 76d082b5cd Misc enhancements to LTO:
1. Add some helper classes for partitions. They are designed in a
     way such that the top-level LTO driver will not see much difference 
     with or without partitioning.

  2. Introduce work-dir. Now all intermediate files generated during 
     LTO phases will be saved under work-dir. User can specify the workdir
     via -lto-workdir=/path/to/dir. By default the work-dir will be 
     erased before linker exit. To keep the workdir, do -lto-keep, or -lto-keep=1.

    TODO: Erase the workdir, if the linker exit prematurely.  
      We are currently not able to remove directory on signal. The support 
      routines simply ignore directory.

  3. Add one new API lto_codegen_get_files_need_remove().
     Linker and LTO plugin will communicate via this API about which files
    (including directories) need to removed before linker exit.

llvm-svn: 188188
2013-08-12 18:29:43 +00:00
Rafael Espindola 3d2ac2e41a Split getOpenFile into getOpenFile and getOpenFileSlice.
The main observation is that we never need both the filesize and the map size.
When mapping a slice of a file, it doesn't make sense to request a null
terminator and that would be the only case where the filesize would be used.

There are other cleanups that should be done in this area:

* A client should not have to pass the size (even an explicit -1) to say if
  it wants a null terminator or not, so we should probably swap the argument
  order.
* The default should be to not require a null terminator. Very few clients
  require this, but many end up asking for it just because it is the default.

llvm-svn: 186984
2013-07-23 20:25:01 +00:00
Rafael Espindola bf1a918461 Fix use of the getOpenFile api.
The gold plugin was passing the desired map size as the file size. This was
working for two reasons:
* Recent version of gold provide the get_view callback, so this code was not
  used.
* In older versions, getOpenFile was called, but the file size is never used
  if we don't require null terminated buffers and map size defaults to the
  file size.

Thanks to Eli Bendersky for noticing this.

I will try to make this api a bit less error prone.

llvm-svn: 186978
2013-07-23 18:44:31 +00:00
Rafael Espindola d9a5608dd7 Fix the build with gcc 4.7 and -std=c++11.
The error message was:

/home/espindola/llvm/llvm/tools/gold/gold-plugin.cpp: In function ‘ld_plugin_status cleanup_hook()’:
/home/espindola/llvm/llvm/tools/gold/gold-plugin.cpp:461:30: error: cannot pass objects of non-trivially-copyable type ‘std::string {aka class std::basic_string<char>}’ through ‘...’

I will check if this was a clang or gcc issue.

llvm-svn: 184138
2013-06-17 22:24:06 +00:00
Rafael Espindola 55ab87f151 Don't use PathV1.h in tools/gold/gold-plugin.cpp.
llvm-svn: 184099
2013-06-17 18:38:18 +00:00
Rafael Espindola 7c1023ad27 Avoid using PathV1.h in Program.h.
llvm-svn: 183940
2013-06-13 20:25:38 +00:00
Chandler Carruth 4d88a1c233 Sort the #include lines for tools/...
Again, tools are trickier to pick the main module header for than
library source files. I've started to follow the pattern of using
LLVMContext.h when it is included as a stub for program source files.

llvm-svn: 169252
2012-12-04 10:44:52 +00:00
Rafael Espindola a339e47689 libLTO has a bug in that it will keep every symbol if none is needed. We used
to hack around this in the gold plugin by deleting a module if no symbol was
needed. Unfortunately, the hack is wrong in the case of o module having no
visible symbols but still having side effects via static constructors.

The bug will have to be fixed in libLTO itself.

llvm-svn: 166745
2012-10-26 00:29:57 +00:00
Rafael Espindola 9aa1fcce58 Use LTO_CODEGEN_PIC_MODEL_DYNAMIC for PIE. This requirest a git version of
gold to work. Since the enum value LDPO_PIE has just been added to plugin-api.h,
use a numeric constant for now so that we don't require an unreleased
version of gold to build.

llvm-svn: 158402
2012-06-13 13:30:24 +00:00
Dylan Noblesmith 9e5b178ecc drop unneeded config.h includes
llvm-svn: 147197
2011-12-22 23:04:07 +00:00
Ivan Krasin 639222d090 use 64-bit types instead of off_t/size_t to avoid the issue when
gold plugin is built with Large File Support (sizeof(off_t) == 64 on i686)
and the rest of LLVM is built w/o Large File Support
(sizeof(off_t) == 32 on i686) which corrupts the stack.

llvm-svn: 139873
2011-09-15 23:13:00 +00:00
Ivan Krasin 5021af51d9 gold plugin: don't report error on non-bitcode (e.g. ELF) files.
llvm-svn: 139544
2011-09-12 21:47:50 +00:00
Ivan Krasin d5f2d8c341 gold plugin: report errors occured in lto_module_create_from_*
llvm-svn: 139340
2011-09-09 00:14:04 +00:00
Nick Lewycky 1fcd0f1581 Don't try to dereference syms[0] on an empty vector. Reported by Todd Jackson
and Jeffrey Bosboom!

llvm-svn: 136066
2011-07-26 08:40:36 +00:00
Duncan Sands 9aa54fef84 Remove an unused variable.
llvm-svn: 130860
2011-05-04 19:13:01 +00:00
Rafael Espindola ece7c9c282 If present, use gold's support for getting a file view. This prevents having
to map the file both in the linker and in the plugin.

llvm-svn: 129109
2011-04-07 21:11:00 +00:00
Rafael Espindola 26b57ffa27 Add a lto_codegen_compile_to_file to avoid producing a file, reading it to
memory and writing it back to disk.

llvm-svn: 128108
2011-03-22 20:57:13 +00:00
Rafael Espindola b39c7c7b17 Add support in the LTO library for loading an object from the middle
of an file.

llvm-svn: 127781
2011-03-17 00:36:11 +00:00
Rafael Espindola 7e5fe6ce1c Gold now rescans archives as needed, so the pass-through options are not
necessary anymore.

llvm-svn: 126580
2011-02-27 20:30:22 +00:00
Rafael Espindola 92c06ba158 bfd was fixed, remove the work around.
llvm-svn: 126579
2011-02-27 20:15:37 +00:00
Rafael Espindola 908d391bd2 LTO uses MC now.
llvm-svn: 126546
2011-02-26 16:44:13 +00:00
Rafael Espindola 9ef90d5b35 Dispose modules early and only create codegen when the plugin is being
used by the linker and not by nm or ar.

llvm-svn: 126089
2011-02-20 18:28:29 +00:00
Rafael Espindola d4f34d840e Add modules to codegen as soon as possible. This reduces the link time
of libxul from 12m31.084s to 7m1.359s.

llvm-svn: 126052
2011-02-19 21:49:57 +00:00
Rafael Espindola 6b6ed5d1f9 Add a debug obj-path option to make it easy to keep the .o produce by LTO.
llvm-svn: 125663
2011-02-16 11:19:44 +00:00
Rafael Espindola 70d8015063 Switch llvm to using comdats. For now always use groups with a single
section.

llvm-svn: 125526
2011-02-14 22:23:49 +00:00
Rafael Espindola 56e41f7f0b Don't open the file again in the gold plugin. To be able to do this, update
MemoryBuffer::getOpenFile to not close the file descriptor.

llvm-svn: 125128
2011-02-08 22:40:47 +00:00
Michael J. Spencer 06f5223621 gold: MinGW fix.
llvm-svn: 123886
2011-01-20 05:43:16 +00:00
Michael J. Spencer ab425d8360 I swear I did a make clean and make before committing all this...
llvm-svn: 120304
2010-11-29 18:47:54 +00:00
Dan Gohman 0df7ea4c24 Move tool_output_file into its own file.
llvm-svn: 115973
2010-10-07 20:32:40 +00:00
Nick Lewycky 3e19542ed3 Fix compile errors.
llvm-svn: 112808
2010-09-02 05:44:31 +00:00
Dan Gohman 8525fe7155 Convert tools to use tool_output_file, and introduce error
checking to places which previously lacked it.

llvm-svn: 111651
2010-08-20 16:59:15 +00:00
Rafael Espindola ccab1dddd1 Make it possible to set the cpu used for codegen.
llvm-svn: 110759
2010-08-11 00:15:13 +00:00
Rafael Espindola 0045646633 Make it possible to set the flags passed to the assembler.
Nick, please review.

llvm-svn: 110705
2010-08-10 18:55:09 +00:00
Rafael Espindola 148c3284ee Fix silly bug.
llvm-svn: 110684
2010-08-10 16:32:15 +00:00
Rafael Espindola 4ef89f5200 Make it possible to set the target triple and expose that with an option in the
gold plugin.

llvm-svn: 110604
2010-08-09 21:09:46 +00:00
Duncan Sands b69a3e27df Remove variables that are written by not read.
llvm-svn: 107126
2010-06-29 11:07:47 +00:00
Rafael Espindola ef49815638 Add an extra-library-path option to the plugin. This is used to support
having a library both as bitcode and native code. We want to use the
bitcode first, but if codegen produces new undefined references we have to use
the native code to satisfy those references.

Gold has no notion of bitcode and native search directories, so instead it has
an API where the plugin can instruct it to look for the libraries it is passing
to it. This patch uses that API.

llvm-svn: 106674
2010-06-23 20:20:59 +00:00
Rafael Espindola 9d94ebf1b6 add_input_file and add_input_library now take const arguments, remove the
const_cast.

llvm-svn: 106410
2010-06-21 02:23:12 +00:00
Rafael Espindola 8297640062 Add a pass-through option to the plugin. The use case for this option is to
ask the linker to take another look into some library or object. The case when
one might want to do this is when codegen introduces a new undefined reference.
The canonical example is libgcc.

llvm-svn: 106303
2010-06-18 19:18:58 +00:00
Rafael Espindola 77b6d01906 Don't produce output only if *all* files are unused.
llvm-svn: 105962
2010-06-14 21:20:52 +00:00
Nick Lewycky 4ecf2cc5ea Plug a leak in the non-error case by removing one level of indirection.
llvm-svn: 105556
2010-06-07 21:42:19 +00:00
Rafael Espindola c4dca3aeb6 Misc cleanups to the gold plugin.
llvm-svn: 105534
2010-06-07 16:45:22 +00:00