0dbcb36394
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: merge_guards_bot, luismarques, smeenai, ldionne, lenary, s.egerton, pzheng, sameer.abuasal, MaskRay, wuzish, echristo, Jim, hiraditya, michaelplatings, chapuni, jholewinski, arsenm, dschuff, jyknight, dylanmckay, sdardis, nemanjai, jvesely, 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
73 lines
2.5 KiB
C++
73 lines
2.5 KiB
C++
//===-- MSP430MCTargetDesc.cpp - MSP430 Target Descriptions ---------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides MSP430 specific target descriptions.
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//
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//===----------------------------------------------------------------------===//
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#include "MSP430MCTargetDesc.h"
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#include "MSP430InstPrinter.h"
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#include "MSP430MCAsmInfo.h"
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#include "TargetInfo/MSP430TargetInfo.h"
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#include "llvm/MC/MCInstrInfo.h"
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#include "llvm/MC/MCRegisterInfo.h"
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#include "llvm/MC/MCSubtargetInfo.h"
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#include "llvm/Support/TargetRegistry.h"
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using namespace llvm;
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#define GET_INSTRINFO_MC_DESC
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#include "MSP430GenInstrInfo.inc"
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#define GET_SUBTARGETINFO_MC_DESC
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#include "MSP430GenSubtargetInfo.inc"
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#define GET_REGINFO_MC_DESC
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#include "MSP430GenRegisterInfo.inc"
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static MCInstrInfo *createMSP430MCInstrInfo() {
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MCInstrInfo *X = new MCInstrInfo();
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InitMSP430MCInstrInfo(X);
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return X;
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}
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static MCRegisterInfo *createMSP430MCRegisterInfo(const Triple &TT) {
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MCRegisterInfo *X = new MCRegisterInfo();
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InitMSP430MCRegisterInfo(X, MSP430::PC);
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return X;
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}
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static MCSubtargetInfo *
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createMSP430MCSubtargetInfo(const Triple &TT, StringRef CPU, StringRef FS) {
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return createMSP430MCSubtargetInfoImpl(TT, CPU, FS);
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}
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static MCInstPrinter *createMSP430MCInstPrinter(const Triple &T,
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unsigned SyntaxVariant,
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const MCAsmInfo &MAI,
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const MCInstrInfo &MII,
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const MCRegisterInfo &MRI) {
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if (SyntaxVariant == 0)
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return new MSP430InstPrinter(MAI, MII, MRI);
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return nullptr;
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}
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extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeMSP430TargetMC() {
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Target &T = getTheMSP430Target();
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RegisterMCAsmInfo<MSP430MCAsmInfo> X(T);
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TargetRegistry::RegisterMCInstrInfo(T, createMSP430MCInstrInfo);
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TargetRegistry::RegisterMCRegInfo(T, createMSP430MCRegisterInfo);
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TargetRegistry::RegisterMCSubtargetInfo(T, createMSP430MCSubtargetInfo);
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TargetRegistry::RegisterMCInstPrinter(T, createMSP430MCInstPrinter);
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TargetRegistry::RegisterMCCodeEmitter(T, createMSP430MCCodeEmitter);
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TargetRegistry::RegisterMCAsmBackend(T, createMSP430MCAsmBackend);
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TargetRegistry::RegisterObjectTargetStreamer(
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T, createMSP430ObjectTargetStreamer);
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}
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