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* Do not emit IMPLICIT_DEF pseudo-instructions

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* Convert register numbers from their opcode value to the real value, e.g.
  PPC::R1 => 1 and PPC::F1 => 1
* Add correct handling of loading of global values which are PC-relative --
  implement ha16() and lo16()


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17190 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Misha Brukman 2004-10-23 18:28:01 +00:00
parent 1118441d7a
commit a4df350ba1
1 changed files with 71 additions and 6 deletions
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77
lib/Target/PowerPC/PPCCodeEmitter.cpp
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@ -14,6 +14,7 @@
#include "PPC32JITInfo.h"
#include "PPC32TargetMachine.h"
#include "PowerPC.h"
#include "llvm/Module.h"
#include "llvm/CodeGen/MachineCodeEmitter.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
@ -199,8 +200,14 @@ bool PPC32CodeEmitter::runOnMachineFunction(MachineFunction &MF) {
}
void PPC32CodeEmitter::emitBasicBlock(MachineBasicBlock &MBB) {
for (MachineBasicBlock::iterator I = MBB.begin(), E = MBB.end(); I != E; ++I)
BBLocations[MBB.getBasicBlock()] = MCE.getCurrentPCValue();
for (MachineBasicBlock::iterator I = MBB.begin(), E = MBB.end(); I != E; ++I){
MachineInstr &MI = *I;
unsigned Opcode = MI.getOpcode();
if (Opcode == PPC::IMPLICIT_DEF) continue;
emitWord(getBinaryCodeForInstr(*I));
}
}
unsigned PPC32CodeEmitter::getAddressOfExternalFunction(Function *F) {
@ -212,12 +219,52 @@ unsigned PPC32CodeEmitter::getAddressOfExternalFunction(Function *F) {
return ExternalFn2Addr[F];
}
static unsigned enumRegToMachineReg(unsigned enumReg) {
switch (enumReg) {
case PPC::R0 : case PPC::F0 : return 0;
case PPC::R1 : case PPC::F1 : return 1;
case PPC::R2 : case PPC::F2 : return 2;
case PPC::R3 : case PPC::F3 : return 3;
case PPC::R4 : case PPC::F4 : return 4;
case PPC::R5 : case PPC::F5 : return 5;
case PPC::R6 : case PPC::F6 : return 6;
case PPC::R7 : case PPC::F7 : return 7;
case PPC::R8 : case PPC::F8 : return 8;
case PPC::R9 : case PPC::F9 : return 9;
case PPC::R10: case PPC::F10: return 10;
case PPC::R11: case PPC::F11: return 11;
case PPC::R12: case PPC::F12: return 12;
case PPC::R13: case PPC::F13: return 13;
case PPC::R14: case PPC::F14: return 14;
case PPC::R15: case PPC::F15: return 15;
case PPC::R16: case PPC::F16: return 16;
case PPC::R17: case PPC::F17: return 17;
case PPC::R18: case PPC::F18: return 18;
case PPC::R19: case PPC::F19: return 19;
case PPC::R20: case PPC::F20: return 20;
case PPC::R21: case PPC::F21: return 21;
case PPC::R22: case PPC::F22: return 22;
case PPC::R23: case PPC::F23: return 23;
case PPC::R24: case PPC::F24: return 24;
case PPC::R25: case PPC::F25: return 25;
case PPC::R26: case PPC::F26: return 26;
case PPC::R27: case PPC::F27: return 27;
case PPC::R28: case PPC::F28: return 28;
case PPC::R29: case PPC::F29: return 29;
case PPC::R30: case PPC::F30: return 30;
case PPC::R31: case PPC::F31: return 31;
default:
std::cerr << "Unhandled reg in enumRegToRealReg!\n";
abort();
}
}
int64_t PPC32CodeEmitter::getMachineOpValue(MachineInstr &MI,
MachineOperand &MO) {
int64_t rv = 0; // Return value; defaults to 0 for unhandled cases
// or things that get fixed up later by the JIT.
if (MO.isRegister()) {
rv = MO.getReg();
rv = enumRegToMachineReg(MO.getReg());
} else if (MO.isImmediate()) {
rv = MO.getImmedValue();
} else if (MO.isGlobalAddress()) {
@ -234,11 +281,15 @@ int64_t PPC32CodeEmitter::getMachineOpValue(MachineInstr &MI,
return (intptr_t)getResolver(MCE).getLazyResolver(F);
}
} else if (GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV)) {
if (GVar->isExternal())
if (GVar->isExternal()) {
rv = MCE.getGlobalValueAddress(MO.getSymbolName());
else {
std::cerr << "PPC32CodeEmitter: External global addr not found: "
<< *GVar;
if (!rv) {
std::cerr << "PPC32CodeEmitter: External global addr not found: "
<< *GVar;
abort();
}
} else {
std::cerr << "PPC32CodeEmitter: global addr not found: " << *GVar;
abort();
}
}
@ -261,6 +312,20 @@ int64_t PPC32CodeEmitter::getMachineOpValue(MachineInstr &MI,
abort();
}
// Special treatment for global symbols: constants and vars
if (MO.isConstantPoolIndex() || MO.isGlobalAddress()) {
unsigned Opcode = MI.getOpcode();
int64_t MBBLoc = BBLocations[MI.getParent()->getBasicBlock()];
if (Opcode == PPC::LOADHiAddr) {
// LoadHiAddr wants hi16(addr - mbb)
rv = (rv - MBBLoc) >> 16;
} else if (Opcode == PPC::LWZ || Opcode == PPC::LA ||
Opcode == PPC::LFS || Opcode == PPC::LFD) {
// These load opcodes want lo16(addr - mbb)
rv = (rv - MBBLoc) & 0xffff;
}
}
return rv;
}