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13 Commits

Author SHA1 Message Date
Tom Stellard 4b0b26199b Revert CMake: Make most target symbols hidden by default 
This reverts r362990 (git commit 374571301d)

This was causing linker warnings on Darwin:

ld: warning: direct access in function 'llvm::initializeEvexToVexInstPassPass(llvm::PassRegistry&)'
from file '../../lib/libLLVMX86CodeGen.a(X86EvexToVex.cpp.o)' to global weak symbol
'void std::__1::__call_once_proxy<std::__1::tuple<void* (&)(llvm::PassRegistry&),
std::__1::reference_wrapper<llvm::PassRegistry>&&> >(void*)' from file '../../lib/libLLVMCore.a(Verifier.cpp.o)'
means the weak symbol cannot be overridden at runtime. This was likely caused by different translation
units being compiled with different visibility settings.

llvm-svn: 363028
 2019-06-11 03:21:13 +00:00
Tom Stellard 374571301d CMake: Make most target symbols hidden by default 
Summary:
For builds with LLVM_BUILD_LLVM_DYLIB=ON and BUILD_SHARED_LIBS=OFF
this change makes all symbols in the target specific libraries hidden
by default.

A new macro called LLVM_EXTERNAL_VISIBILITY has been added to mark symbols in these
libraries public, which is mainly needed for the definitions of the
LLVMInitialize* functions.

This patch reduces the number of public symbols in libLLVM.so by about
25%.  This should improve load times for the dynamic library and also
make abi checker tools, like abidiff require less memory when analyzing
libLLVM.so

One side-effect of this change is that for builds with
LLVM_BUILD_LLVM_DYLIB=ON and LLVM_LINK_LLVM_DYLIB=ON some unittests that
access symbols that are no longer public will need to be statically linked.

Before and after public symbol counts (using gcc 8.2.1, ld.bfd 2.31.1):
nm before/libLLVM-9svn.so | grep ' [A-Zuvw] ' | wc -l
36221
nm after/libLLVM-9svn.so | grep ' [A-Zuvw] ' | wc -l
26278

Reviewers: chandlerc, beanz, mgorny, rnk, hans

Reviewed By: rnk, hans

Subscribers: Jim, hiraditya, michaelplatings, chapuni, jholewinski, arsenm, dschuff, jyknight, dylanmckay, sdardis, nemanjai, jvesely, nhaehnle, javed.absar, sbc100, jgravelle-google, aheejin, kbarton, fedor.sergeev, asb, rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, jrtc27, zzheng, edward-jones, mgrang, atanasyan, rogfer01, MartinMosbeck, brucehoult, the_o, PkmX, jocewei, kristina, jsji, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D54439

llvm-svn: 362990
 2019-06-10 22:12:56 +00:00
Richard Trieu 51fc56d603 [RISCV] Create a TargetInfo header. NFC 
Move the declarations of getThe<Name>Target() functions into a new header in
TargetInfo and make users of these functions include this new header.
This fixes a layering problem.

llvm-svn: 360732
 2019-05-15 00:24:15 +00:00
Richard Trieu 00ecf67045 [RISCV] Move InstPrinter files to MCTargetDesc. NFC 
For some targets, there is a circular dependency between InstPrinter and
MCTargetDesc.  Merging them together will fix this.  For the other targets,
the merging is to maintain consistency so all targets will have the same
structure

llvm-svn: 360505
 2019-05-11 02:43:58 +00:00
Chandler Carruth 2946cd7010 Update the file headers across all of the LLVM projects in the monorepo 
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
 2019-01-19 08:50:56 +00:00
Alex Bradbury bca0c3cdb6 [RISCV] Support .option rvc and norvc assembler directives 
These directives allow the 'C' (compressed) extension to be enabled/disabled 
within a single file.

Differential Revision: https://reviews.llvm.org/D45864
Patch by Kito Cheng

llvm-svn: 332107
 2018-05-11 17:30:28 +00:00
Shiva Chen 056d835fa4 [RISCV] Encode RISCV specific ELF e_flags to RISCV Binary by RISCVTargetStreamer 
llvm-svn: 323507
 2018-01-26 07:53:07 +00:00
Alex Bradbury ee7c7ecd03 [RISCV] Prepare for the use of variable-sized register classes 
While parameterising by XLen, also take the opportunity to clean up the 
formatting of the RISCV .td files.

This commit unifies the in-tree code with my patchset at 
<https://github.com/lowrisc/riscv-llvm>.

llvm-svn: 316159
 2017-10-19 14:29:03 +00:00
Alex Bradbury 8ab4a9696a [RISCV] Add support for disassembly 
This Disassembly support allows for 'round-trip' testing, and rv32i-valid.s
has been updated appropriately.

Differential Revision: https://reviews.llvm.org/D23567

llvm-svn: 313486
 2017-09-17 14:36:28 +00:00
Alex Bradbury 4f7f0da574 [RISCV][NFC] Fix sorting of includes in lib/Target/RISCV 
llvm-svn: 312624
 2017-09-06 09:21:21 +00:00
Alex Bradbury 2fee9ead7e [RISCV] Add RISCVInstPrinter and basic MC assembler tests 
With the addition of RISCVInstPrinter, it is now possible to test the basic 
operation of the RISCV MC layer.

Differential Revision: https://reviews.llvm.org/D23564

llvm-svn: 310917
 2017-08-15 13:08:29 +00:00
Alex Bradbury d36e04cb6c [RISCV] Fix unused variable in RISCVMCTargetDesc. NFC 
Also, for better uniformity use TargetRegistry::RegisterMCAsmInfo rather than 
RegisterMCAsmInfoFn. Again, no functional change.

llvm-svn: 295026
 2017-02-14 05:15:24 +00:00
Alex Bradbury 6b2cca7f8f [RISCV] Add bare-bones RISC-V MCTargetDesc 
This is enough to compile and link but doesn't yet do anything particularly 
useful. Once an ASM parser and printer are added in the next two patches, the 
whole thing can be usefully tested.

Differential Revision: https://reviews.llvm.org/D23562

llvm-svn: 285770
 2016-11-01 23:47:30 +00:00