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| author | Brian Gaeke <gaeke@uiuc.edu> | 2004-04-06 22:10:22 +0000 |
|---|---|---|
| committer | Brian Gaeke <gaeke@uiuc.edu> | 2004-04-06 22:10:22 +0000 |
| commit | 3a8ad62d4ffa9de99f8835fe9592d4d6ef0a2730 (patch) | |
| tree | 0b98c67008f1df12461e7e8e2e3a2aed8f4ac8af | |
| parent | 1c38175d6b7978768645fac271db435bef337a13 (diff) | |
| download | external_llvm-3a8ad62d4ffa9de99f8835fe9592d4d6ef0a2730.zip external_llvm-3a8ad62d4ffa9de99f8835fe9592d4d6ef0a2730.tar.gz external_llvm-3a8ad62d4ffa9de99f8835fe9592d4d6ef0a2730.tar.bz2 | |
First attempt at handling frame index elimination.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12728 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/Sparc/SparcRegisterInfo.cpp | 19 | ||||
| -rw-r--r-- | lib/Target/SparcV8/SparcV8RegisterInfo.cpp | 19 |
2 files changed, 22 insertions, 16 deletions
diff --git a/lib/Target/Sparc/SparcRegisterInfo.cpp b/lib/Target/Sparc/SparcRegisterInfo.cpp index 8d74d8a..5ca69e0 100644 --- a/lib/Target/Sparc/SparcRegisterInfo.cpp +++ b/lib/Target/Sparc/SparcRegisterInfo.cpp @@ -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: diff --git a/lib/Target/SparcV8/SparcV8RegisterInfo.cpp b/lib/Target/SparcV8/SparcV8RegisterInfo.cpp index 8d74d8a..5ca69e0 100644 --- a/lib/Target/SparcV8/SparcV8RegisterInfo.cpp +++ b/lib/Target/SparcV8/SparcV8RegisterInfo.cpp @@ -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: |