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Change the PPC JIT to use a Static relocation model

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27937 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nate Begeman 2006-04-21 22:04:15 +00:00
parent 99d3c276cc
commit 6fcbd6961d
3 changed files with 4 additions and 29 deletions
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18
lib/Target/PowerPC/PPCCodeEmitter.cpp
View File

@ -157,11 +157,6 @@ int PPCCodeEmitter::getMachineOpValue(MachineInstr &MI, MachineOperand &MO) {
} else if (MO.isImmediate()) {
rv = MO.getImmedValue();
} else if (MO.isGlobalAddress() || MO.isExternalSymbol()) {
bool isExternal = MO.isExternalSymbol() ||
MO.getGlobal()->hasWeakLinkage() ||
MO.getGlobal()->hasLinkOnceLinkage() ||
(MO.getGlobal()->isExternal() &&
!MO.getGlobal()->hasNotBeenReadFromBytecode());
unsigned Reloc = 0;
if (MI.getOpcode() == PPC::BL)
Reloc = PPC::reloc_pcrel_bx;
@ -169,15 +164,9 @@ int PPCCodeEmitter::getMachineOpValue(MachineInstr &MI, MachineOperand &MO) {
switch (MI.getOpcode()) {
default: MI.dump(); assert(0 && "Unknown instruction for relocation!");
case PPC::LIS:
if (isExternal)
Reloc = PPC::reloc_absolute_ptr_high; // Pointer to stub
else
Reloc = PPC::reloc_absolute_high; // Pointer to symbol
Reloc = PPC::reloc_absolute_high; // Pointer to symbol
break;
case PPC::LA:
assert(!isExternal && "Something in the ISEL changed\n");
Reloc = PPC::reloc_absolute_low;
break;
case PPC::LBZ:
case PPC::LHA:
case PPC::LHZ:
@ -189,10 +178,7 @@ int PPCCodeEmitter::getMachineOpValue(MachineInstr &MI, MachineOperand &MO) {
case PPC::STW:
case PPC::STFS:
case PPC::STFD:
if (isExternal)
Reloc = PPC::reloc_absolute_ptr_low;
else
Reloc = PPC::reloc_absolute_low;
Reloc = PPC::reloc_absolute_low;
break;
}
}

13
lib/Target/PowerPC/PPCJITInfo.cpp
View File

@ -201,19 +201,8 @@ void PPCJITInfo::relocate(void *Function, MachineRelocation *MR,
"Relocation out of range!");
*RelocPos |= (ResultPtr & ((1 << 24)-1)) << 2;
break;
case PPC::reloc_absolute_ptr_high: // Pointer relocations.
case PPC::reloc_absolute_ptr_low: {
// Pointer relocations are used for the PPC external stubs and lazy
// resolver pointers that the Darwin ABI likes to use. Basically, the
// address of the global is actually stored in memory, and the address of
// the pointer is relocated into instructions instead of the pointer
// itself. Because we have to keep the mapping anyway, we just return
// pointers to the values in the map as our new location.
static std::set<void*> Pointers;
ResultPtr = (intptr_t)&*Pointers.insert((void*)ResultPtr).first;
}
// FALL THROUGH
case PPC::reloc_absolute_ptr_low:
case PPC::reloc_absolute_high: // high bits of ref -> low 16 of instr
case PPC::reloc_absolute_low: // low bits of ref -> low 16 of instr
ResultPtr += MR->getConstantVal();

2
lib/Target/PowerPC/PPCTargetMachine.cpp
View File

@ -130,7 +130,7 @@ bool PPCTargetMachine::addPassesToEmitFile(PassManager &PM,
void PPCJITInfo::addPassesToJITCompile(FunctionPassManager &PM) {
// The JIT should use dynamic-no-pic relocation model.
TM.setRelocationModel(Reloc::DynamicNoPIC);
TM.setRelocationModel(Reloc::Static);
// Run loop strength reduction before anything else.
PM.add(createLoopStrengthReducePass(TM.getTargetLowering()));