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First attempt at handling frame index elimination.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12728 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Brian Gaeke 2004-04-06 22:10:22 +00:00
parent 1c38175d6b
commit 3a8ad62d4f
2 changed files with 22 additions and 16 deletions
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19
lib/Target/Sparc/SparcRegisterInfo.cpp
View File

@ -33,7 +33,7 @@ int SparcV8RegisterInfo::storeRegToStackSlot(
assert (RC == SparcV8::IntRegsRegisterClass
&& "Can only store 32-bit values to stack slots");
MachineInstr *I =
BuildMI (V8::STrm, 2).addFrameIndex (FrameIdx).addReg (SrcReg);
BuildMI (V8::STrm, 3).addFrameIndex (FrameIdx).addSImm (0).addReg (SrcReg);
MBB.insert(MBBI, I);
return 1;
}
@ -47,7 +47,7 @@ int SparcV8RegisterInfo::loadRegFromStackSlot(
assert (RC == SparcV8::IntRegsRegisterClass
&& "Can only load 32-bit registers from stack slots");
MachineInstr *I =
BuildMI (V8::LDmr, 2).addReg (DestReg).addFrameIndex (FrameIdx);
BuildMI (V8::LDmr, 2).addReg (DestReg).addFrameIndex (FrameIdx).addSImm (0);
MBB.insert(MBBI, I);
return 1;
}
@ -84,11 +84,14 @@ SparcV8RegisterInfo::eliminateFrameIndex(MachineFunction &MF,
int FrameIndex = MI.getOperand(i).getFrameIndex();
std::cerr
<< "Sorry, I don't know how to eliminate frame indices yet\n"
<< "Frame index was " << FrameIndex << ", in\n"
<< __FUNCTION__ << "() at " << __FILE__ << ":" << __LINE__ << "\n";
abort();
// Replace frame index with a frame pointer reference
MI.SetMachineOperandReg (i, V8::FP);
// Addressable stack objects are accessed using neg. offsets from %fp
int Offset = MF.getFrameInfo()->getObjectOffset(FrameIndex) +
MI.getOperand(i+1).getImmedValue();
// note: Offset < 0
MI.SetMachineOperandConst (i+1, MachineOperand::MO_SignExtendedImmed, Offset);
}
void SparcV8RegisterInfo::
@ -99,7 +102,7 @@ void SparcV8RegisterInfo::emitPrologue(MachineFunction &MF) const {
MachineFrameInfo *MFI = MF.getFrameInfo();
// Get the number of bytes to allocate from the FrameInfo
int NumBytes = (int) MFI->getStackSize();
int NumBytes = (int) MFI->getStackSize() + 4;
// Emit the correct save instruction based on the number of bytes in the frame.
// Minimum stack frame size according to V8 ABI is:

19
lib/Target/SparcV8/SparcV8RegisterInfo.cpp
View File

@ -33,7 +33,7 @@ int SparcV8RegisterInfo::storeRegToStackSlot(
assert (RC == SparcV8::IntRegsRegisterClass
&& "Can only store 32-bit values to stack slots");
MachineInstr *I =
BuildMI (V8::STrm, 2).addFrameIndex (FrameIdx).addReg (SrcReg);
BuildMI (V8::STrm, 3).addFrameIndex (FrameIdx).addSImm (0).addReg (SrcReg);
MBB.insert(MBBI, I);
return 1;
}
@ -47,7 +47,7 @@ int SparcV8RegisterInfo::loadRegFromStackSlot(
assert (RC == SparcV8::IntRegsRegisterClass
&& "Can only load 32-bit registers from stack slots");
MachineInstr *I =
BuildMI (V8::LDmr, 2).addReg (DestReg).addFrameIndex (FrameIdx);
BuildMI (V8::LDmr, 2).addReg (DestReg).addFrameIndex (FrameIdx).addSImm (0);
MBB.insert(MBBI, I);
return 1;
}
@ -84,11 +84,14 @@ SparcV8RegisterInfo::eliminateFrameIndex(MachineFunction &MF,
int FrameIndex = MI.getOperand(i).getFrameIndex();
std::cerr
<< "Sorry, I don't know how to eliminate frame indices yet\n"
<< "Frame index was " << FrameIndex << ", in\n"
<< __FUNCTION__ << "() at " << __FILE__ << ":" << __LINE__ << "\n";
abort();
// Replace frame index with a frame pointer reference
MI.SetMachineOperandReg (i, V8::FP);
// Addressable stack objects are accessed using neg. offsets from %fp
int Offset = MF.getFrameInfo()->getObjectOffset(FrameIndex) +
MI.getOperand(i+1).getImmedValue();
// note: Offset < 0
MI.SetMachineOperandConst (i+1, MachineOperand::MO_SignExtendedImmed, Offset);
}
void SparcV8RegisterInfo::
@ -99,7 +102,7 @@ void SparcV8RegisterInfo::emitPrologue(MachineFunction &MF) const {
MachineFrameInfo *MFI = MF.getFrameInfo();
// Get the number of bytes to allocate from the FrameInfo
int NumBytes = (int) MFI->getStackSize();
int NumBytes = (int) MFI->getStackSize() + 4;
// Emit the correct save instruction based on the number of bytes in the frame.
// Minimum stack frame size according to V8 ABI is: