//===----------------------------------------------------------------------===//
#include "PPCInstrInfo.h"
+#include "PPCPredicates.h"
#include "PPCGenInstrInfo.inc"
#include "PPCTargetMachine.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
-#include <iostream>
using namespace llvm;
PPCInstrInfo::PPCInstrInfo(PPCTargetMachine &tm)
- : TargetInstrInfo(PPCInsts, sizeof(PPCInsts)/sizeof(PPCInsts[0])), TM(tm) {}
+ : TargetInstrInfo(PPCInsts, sizeof(PPCInsts)/sizeof(PPCInsts[0])), TM(tm),
+ RI(*TM.getSubtargetImpl(), *this) {}
/// getPointerRegClass - Return the register class to use to hold pointers.
/// This is used for addressing modes.
unsigned& sourceReg,
unsigned& destReg) const {
MachineOpCode oc = MI.getOpcode();
- if (oc == PPC::OR4 || oc == PPC::OR8 || oc == PPC::VOR ||
+ if (oc == PPC::OR || oc == PPC::OR8 || oc == PPC::VOR ||
oc == PPC::OR4To8 || oc == PPC::OR8To4) { // or r1, r2, r2
assert(MI.getNumOperands() == 3 &&
MI.getOperand(0).isRegister() &&
// Swap op1/op2
unsigned Reg1 = MI->getOperand(1).getReg();
unsigned Reg2 = MI->getOperand(2).getReg();
+ bool Reg1IsKill = MI->getOperand(1).isKill();
+ bool Reg2IsKill = MI->getOperand(2).isKill();
MI->getOperand(2).setReg(Reg1);
MI->getOperand(1).setReg(Reg2);
+ if (Reg1IsKill)
+ MI->getOperand(2).setIsKill();
+ else
+ MI->getOperand(2).unsetIsKill();
+ if (Reg2IsKill)
+ MI->getOperand(1).setIsKill();
+ else
+ MI->getOperand(1).unsetIsKill();
// Swap the mask around.
unsigned MB = MI->getOperand(4).getImmedValue();
void PPCInstrInfo::insertNoop(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI) const {
- BuildMI(MBB, MI, PPC::NOP, 0);
+ BuildMI(MBB, MI, get(PPC::NOP));
+}
+
+
+// Branch analysis.
+bool PPCInstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,MachineBasicBlock *&TBB,
+ MachineBasicBlock *&FBB,
+ std::vector<MachineOperand> &Cond) const {
+ // If the block has no terminators, it just falls into the block after it.
+ MachineBasicBlock::iterator I = MBB.end();
+ if (I == MBB.begin() || !isTerminatorInstr((--I)->getOpcode()))
+ return false;
+
+ // Get the last instruction in the block.
+ MachineInstr *LastInst = I;
+
+ // If there is only one terminator instruction, process it.
+ if (I == MBB.begin() || !isTerminatorInstr((--I)->getOpcode())) {
+ if (LastInst->getOpcode() == PPC::B) {
+ TBB = LastInst->getOperand(0).getMachineBasicBlock();
+ return false;
+ } else if (LastInst->getOpcode() == PPC::BCC) {
+ // Block ends with fall-through condbranch.
+ TBB = LastInst->getOperand(2).getMachineBasicBlock();
+ Cond.push_back(LastInst->getOperand(0));
+ Cond.push_back(LastInst->getOperand(1));
+ return false;
+ }
+ // Otherwise, don't know what this is.
+ return true;
+ }
+
+ // Get the instruction before it if it's a terminator.
+ MachineInstr *SecondLastInst = I;
+
+ // If there are three terminators, we don't know what sort of block this is.
+ if (SecondLastInst && I != MBB.begin() &&
+ isTerminatorInstr((--I)->getOpcode()))
+ return true;
+
+ // If the block ends with PPC::B and PPC:BCC, handle it.
+ if (SecondLastInst->getOpcode() == PPC::BCC &&
+ LastInst->getOpcode() == PPC::B) {
+ TBB = SecondLastInst->getOperand(2).getMachineBasicBlock();
+ Cond.push_back(SecondLastInst->getOperand(0));
+ Cond.push_back(SecondLastInst->getOperand(1));
+ FBB = LastInst->getOperand(0).getMachineBasicBlock();
+ return false;
+ }
+
+ // Otherwise, can't handle this.
+ return true;
+}
+
+void PPCInstrInfo::RemoveBranch(MachineBasicBlock &MBB) const {
+ MachineBasicBlock::iterator I = MBB.end();
+ if (I == MBB.begin()) return;
+ --I;
+ if (I->getOpcode() != PPC::B && I->getOpcode() != PPC::BCC)
+ return;
+
+ // Remove the branch.
+ I->eraseFromParent();
+
+ I = MBB.end();
+
+ if (I == MBB.begin()) return;
+ --I;
+ if (I->getOpcode() != PPC::BCC)
+ return;
+
+ // Remove the branch.
+ I->eraseFromParent();
+}
+
+void PPCInstrInfo::InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
+ MachineBasicBlock *FBB,
+ const std::vector<MachineOperand> &Cond) const {
+ // Shouldn't be a fall through.
+ assert(TBB && "InsertBranch must not be told to insert a fallthrough");
+ assert((Cond.size() == 2 || Cond.size() == 0) &&
+ "PPC branch conditions have two components!");
+
+ // One-way branch.
+ if (FBB == 0) {
+ if (Cond.empty()) // Unconditional branch
+ BuildMI(&MBB, get(PPC::B)).addMBB(TBB);
+ else // Conditional branch
+ BuildMI(&MBB, get(PPC::BCC))
+ .addImm(Cond[0].getImm()).addReg(Cond[1].getReg()).addMBB(TBB);
+ return;
+ }
+
+ // Two-way Conditional Branch.
+ BuildMI(&MBB, get(PPC::BCC))
+ .addImm(Cond[0].getImm()).addReg(Cond[1].getReg()).addMBB(TBB);
+ BuildMI(&MBB, get(PPC::B)).addMBB(FBB);
+}
+
+bool PPCInstrInfo::BlockHasNoFallThrough(MachineBasicBlock &MBB) const {
+ if (MBB.empty()) return false;
+
+ switch (MBB.back().getOpcode()) {
+ case PPC::B: // Uncond branch.
+ case PPC::BCTR: // Indirect branch.
+ return true;
+ default: return false;
+ }
+}
+
+bool PPCInstrInfo::
+ReverseBranchCondition(std::vector<MachineOperand> &Cond) const {
+ assert(Cond.size() == 2 && "Invalid PPC branch opcode!");
+ // Leave the CR# the same, but invert the condition.
+ Cond[0].setImm(PPC::InvertPredicate((PPC::Predicate)Cond[0].getImm()));
+ return false;
}