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Adjustments to work with the simpler spill interface

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5144 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2002-12-25 05:04:20 +00:00
parent 831fdcf017
commit 5124aec32f
1 changed files with 24 additions and 22 deletions
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46
lib/CodeGen/RegAllocSimple.cpp
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@ -6,6 +6,7 @@
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/SSARegMap.h"
#include "llvm/Target/MachineInstrInfo.h"
#include "llvm/Target/TargetMachine.h"
#include "Support/Statistic.h"
@ -145,11 +146,11 @@ unsigned RegAllocSimple::getStackSpaceFor(unsigned VirtReg,
}
unsigned RegAllocSimple::getFreeReg(unsigned virtualReg) {
const TargetRegisterClass* regClass = MF->getRegClass(virtualReg);
const TargetRegisterClass* RC = MF->getSSARegMap()->getRegClass(virtualReg);
unsigned regIdx = RegClassIdx[regClass]++;
assert(regIdx < regClass->getNumRegs() && "Not enough registers!");
unsigned physReg = regClass->getRegister(regIdx);
unsigned regIdx = RegClassIdx[RC]++;
assert(regIdx < RC->getNumRegs() && "Not enough registers!");
unsigned physReg = RC->getRegister(regIdx);
if (RegsUsed.find(physReg) == RegsUsed.end())
return physReg;
@ -160,14 +161,14 @@ unsigned RegAllocSimple::getFreeReg(unsigned virtualReg) {
unsigned RegAllocSimple::reloadVirtReg(MachineBasicBlock &MBB,
MachineBasicBlock::iterator &I,
unsigned VirtReg) {
const TargetRegisterClass* regClass = MF->getRegClass(VirtReg);
unsigned stackOffset = getStackSpaceFor(VirtReg, regClass);
const TargetRegisterClass* RC = MF->getSSARegMap()->getRegClass(VirtReg);
unsigned stackOffset = getStackSpaceFor(VirtReg, RC);
unsigned PhysReg = getFreeReg(VirtReg);
// Add move instruction(s)
++NumReloaded;
I = RegInfo->loadRegOffset2Reg(MBB, I, PhysReg, RegInfo->getFramePointer(),
-stackOffset, regClass->getDataSize());
RegInfo->loadRegOffset2Reg(MBB, I, PhysReg, RegInfo->getFramePointer(),
-stackOffset, RC);
return PhysReg;
}
@ -175,13 +176,13 @@ void RegAllocSimple::spillVirtReg(MachineBasicBlock &MBB,
MachineBasicBlock::iterator &I,
unsigned VirtReg, unsigned PhysReg)
{
const TargetRegisterClass* regClass = MF->getRegClass(VirtReg);
unsigned stackOffset = getStackSpaceFor(VirtReg, regClass);
const TargetRegisterClass* RC = MF->getSSARegMap()->getRegClass(VirtReg);
unsigned stackOffset = getStackSpaceFor(VirtReg, RC);
// Add move instruction(s)
++NumSpilled;
I = RegInfo->storeReg2RegOffset(MBB, I, PhysReg, RegInfo->getFramePointer(),
-stackOffset, regClass->getDataSize());
RegInfo->storeReg2RegOffset(MBB, I, PhysReg, RegInfo->getFramePointer(),
-stackOffset, RC);
}
@ -234,20 +235,21 @@ void RegAllocSimple::EliminatePHINodes(MachineBasicBlock &MBB) {
// move back to the first branch instruction so new instructions
// are inserted right in front of it and not in front of a non-branch
//
if (!MII.isBranch(opMI->getOpcode()))
++opI;
unsigned dataSize = MF->getRegClass(virtualReg)->getDataSize();
const TargetRegisterClass *RC =
MF->getSSARegMap()->getRegClass(virtualReg);
// Retrieve the constant value from this op, move it to target
// register of the phi
if (opVal.isImmediate()) {
opI = RegInfo->moveImm2Reg(opBlock, opI, virtualReg,
(unsigned) opVal.getImmedValue(),
dataSize);
RegInfo->moveImm2Reg(opBlock, opI, virtualReg,
(unsigned) opVal.getImmedValue(), RC);
} else {
opI = RegInfo->moveReg2Reg(opBlock, opI, virtualReg,
opVal.getAllocatedRegNum(), dataSize);
RegInfo->moveReg2Reg(opBlock, opI, virtualReg,
opVal.getAllocatedRegNum(), RC);
}
}
}
@ -331,8 +333,8 @@ void RegAllocSimple::EmitPrologue() {
unsigned Offset = getStackSpaceFor(CSRegs[i], RegClass);
// Insert the spill to the stack frame...
I = RegInfo->storeReg2RegOffset(MBB, I,CSRegs[i],RegInfo->getFramePointer(),
-Offset, RegClass->getDataSize());
RegInfo->storeReg2RegOffset(MBB, I,CSRegs[i],RegInfo->getFramePointer(),
-Offset, RegClass);
++NumSpilled;
}
@ -353,8 +355,8 @@ void RegAllocSimple::EmitEpilogue(MachineBasicBlock &MBB) {
const TargetRegisterClass *RegClass = RegInfo->getRegClass(CSRegs[i]);
unsigned Offset = getStackSpaceFor(CSRegs[i], RegClass);
I = RegInfo->loadRegOffset2Reg(MBB, I, CSRegs[i],RegInfo->getFramePointer(),
-Offset, RegClass->getDataSize());
RegInfo->loadRegOffset2Reg(MBB, I, CSRegs[i],RegInfo->getFramePointer(),
-Offset, RegClass);
--I; // Insert in reverse order
++NumReloaded;
}