6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-10-26 02:22:29 +00:00
Code Issues Projects Releases Wiki Activity

Fixed a bug where moves due to phis were being neglected.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5019 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Misha Brukman
2002-12-13 12:33:31 +00:00
parent 84b7207df8
commit 0868667f78
1 changed files with 19 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
lib/CodeGen/RegAllocSimple.cpp
View File

@@ -253,7 +253,7 @@ bool RegAllocSimple::runOnMachineFunction(MachineFunction &Fn) {
if (targetReg.isVirtualRegister()) { if (targetReg.isVirtualRegister()) {
physReg = getFreeReg(virtualReg); physReg = getFreeReg(virtualReg);
} else { } else {
physReg = targetReg.getAllocatedRegNum(); physReg = virtualReg;
} }
// Find the register class of the target register: should be the // Find the register class of the target register: should be the
@@ -293,29 +293,25 @@ bool RegAllocSimple::runOnMachineFunction(MachineFunction &Fn) {
++opI; ++opI;
// insert the move just before the return/branch // Retrieve the constant value from this op, move it to target
if (MII.isReturn(opMI->getOpcode()) || MII.isBranch(opMI->getOpcode())) // register of the phi
if (opVal.getType() == MachineOperand::MO_SignExtendedImmed ||
opVal.getType() == MachineOperand::MO_UnextendedImmed)
{ {
// Retrieve the constant value from this op, move it to target opI = RegInfo->moveImm2Reg(opBlock, opI, physReg,
// register of the phi (unsigned) opVal.getImmedValue(),
if (opVal.getType() == MachineOperand::MO_SignExtendedImmed || dataSize);
opVal.getType() == MachineOperand::MO_UnextendedImmed) saveVirtRegToStack(opBlock, opI, virtualReg, physReg);
{ } else {
opI = RegInfo->moveImm2Reg(opBlock, opI, physReg, // Allocate a physical register and add a move in the BB
(unsigned) opVal.getImmedValue(), unsigned opVirtualReg = (unsigned) opVal.getAllocatedRegNum();
dataSize); unsigned opPhysReg; // = getFreeReg(opVirtualReg);
saveVirtRegToStack(opBlock, opI, virtualReg, physReg); opI = moveUseToReg(opBlock, opI, opVirtualReg, physReg);
} else { //opI = RegInfo->moveReg2Reg(opBlock, opI, physReg, opPhysReg,
// Allocate a physical register and add a move in the BB // dataSize);
unsigned opVirtualReg = (unsigned) opVal.getAllocatedRegNum(); // Save that register value to the stack of the TARGET REG
unsigned opPhysReg; // = getFreeReg(opVirtualReg); saveVirtRegToStack(opBlock, opI, virtualReg, physReg);
opI = moveUseToReg(opBlock, opI, opVirtualReg, opPhysReg); }
opI = RegInfo->moveReg2Reg(opBlock, opI, physReg, opPhysReg,
dataSize);
// Save that register value to the stack of the TARGET REG
saveVirtRegToStack(opBlock, opI, virtualReg, opPhysReg);
}
}
// make regs available to other instructions // make regs available to other instructions
clearAllRegs(); clearAllRegs();