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| author | dim <dim@FreeBSD.org> | 2012-08-15 19:34:23 +0000 |
|---|---|---|
| committer | dim <dim@FreeBSD.org> | 2012-08-15 19:34:23 +0000 |
| commit | 721c201bd55ffb73cb2ba8d39e0570fa38c44e15 (patch) | |
| tree | eacfc83d988e4b9d11114387ae7dc41243f2a363 /lib/Target/Mips/MipsEmitGPRestore.cpp | |
| parent | 2b2816e083a455f7a656ae88b0fd059d1688bb36 (diff) | |
| download | FreeBSD-src-721c201bd55ffb73cb2ba8d39e0570fa38c44e15.zip FreeBSD-src-721c201bd55ffb73cb2ba8d39e0570fa38c44e15.tar.gz | |
Vendor import of llvm trunk r161861:
http://llvm.org/svn/llvm-project/llvm/trunk@161861
Diffstat (limited to 'lib/Target/Mips/MipsEmitGPRestore.cpp')
| -rw-r--r-- | lib/Target/Mips/MipsEmitGPRestore.cpp | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/lib/Target/Mips/MipsEmitGPRestore.cpp b/lib/Target/Mips/MipsEmitGPRestore.cpp deleted file mode 100644 index 119d1a8..0000000 --- a/lib/Target/Mips/MipsEmitGPRestore.cpp +++ /dev/null @@ -1,97 +0,0 @@ -//===-- MipsEmitGPRestore.cpp - Emit GP Restore Instruction ---------------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This pass emits instructions that restore $gp right -// after jalr instructions. -// -//===----------------------------------------------------------------------===// - -#define DEBUG_TYPE "emit-gp-restore" - -#include "Mips.h" -#include "MipsTargetMachine.h" -#include "MipsMachineFunction.h" -#include "llvm/CodeGen/MachineFunctionPass.h" -#include "llvm/CodeGen/MachineInstrBuilder.h" -#include "llvm/Target/TargetInstrInfo.h" -#include "llvm/ADT/Statistic.h" - -using namespace llvm; - -namespace { - struct Inserter : public MachineFunctionPass { - - TargetMachine &TM; - const TargetInstrInfo *TII; - - static char ID; - Inserter(TargetMachine &tm) - : MachineFunctionPass(ID), TM(tm), TII(tm.getInstrInfo()) { } - - virtual const char *getPassName() const { - return "Mips Emit GP Restore"; - } - - bool runOnMachineFunction(MachineFunction &F); - }; - char Inserter::ID = 0; -} // end of anonymous namespace - -bool Inserter::runOnMachineFunction(MachineFunction &F) { - MipsFunctionInfo *MipsFI = F.getInfo<MipsFunctionInfo>(); - - if ((TM.getRelocationModel() != Reloc::PIC_) || - (!MipsFI->globalBaseRegFixed())) - return false; - - bool Changed = false; - int FI = MipsFI->getGPFI(); - - for (MachineFunction::iterator MFI = F.begin(), MFE = F.end(); - MFI != MFE; ++MFI) { - MachineBasicBlock& MBB = *MFI; - MachineBasicBlock::iterator I = MFI->begin(); - - // If MBB is a landing pad, insert instruction that restores $gp after - // EH_LABEL. - if (MBB.isLandingPad()) { - // Find EH_LABEL first. - for (; I->getOpcode() != TargetOpcode::EH_LABEL; ++I) ; - - // Insert lw. - ++I; - DebugLoc dl = I != MBB.end() ? I->getDebugLoc() : DebugLoc(); - BuildMI(MBB, I, dl, TII->get(Mips::LW), Mips::GP).addFrameIndex(FI) - .addImm(0); - Changed = true; - } - - while (I != MFI->end()) { - if (I->getOpcode() != Mips::JALR) { - ++I; - continue; - } - - DebugLoc dl = I->getDebugLoc(); - // emit lw $gp, ($gp save slot on stack) after jalr - BuildMI(MBB, ++I, dl, TII->get(Mips::LW), Mips::GP).addFrameIndex(FI) - .addImm(0); - Changed = true; - } - } - - return Changed; -} - -/// createMipsEmitGPRestorePass - Returns a pass that emits instructions that -/// restores $gp clobbered by jalr instructions. -FunctionPass *llvm::createMipsEmitGPRestorePass(MipsTargetMachine &tm) { - return new Inserter(tm); -} - |
