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Add support for many of the MRegisterInfo callbacks.
Eliminating call-frame pseudo instrs and frame indices are still stubs. Flesh out the emitPrologue method based on better ABI knowledge. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12632 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -15,6 +15,7 @@
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#include "SparcV8RegisterInfo.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/Type.h"
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#include "Support/STLExtras.h"
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using namespace llvm;
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@ -29,8 +30,12 @@ int SparcV8RegisterInfo::storeRegToStackSlot(
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unsigned SrcReg, int FrameIdx,
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const TargetRegisterClass *RC) const
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{
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abort();
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return -1;
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assert (RC == SparcV8::IntRegsRegisterClass
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&& "Can only store 32-bit values to stack slots");
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MachineInstr *I =
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BuildMI (V8::STrm, 2).addFrameIndex (FrameIdx).addReg (SrcReg);
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MBB.insert(MBBI, I);
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return 1;
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}
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int SparcV8RegisterInfo::loadRegFromStackSlot(
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@ -39,27 +44,50 @@ int SparcV8RegisterInfo::loadRegFromStackSlot(
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unsigned DestReg, int FrameIdx,
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const TargetRegisterClass *RC) const
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{
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abort();
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return -1;
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assert (RC == SparcV8::IntRegsRegisterClass
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&& "Can only load 32-bit registers from stack slots");
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MachineInstr *I =
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BuildMI (V8::LDmr, 2).addReg (DestReg).addFrameIndex (FrameIdx);
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MBB.insert(MBBI, I);
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return 1;
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}
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int SparcV8RegisterInfo::copyRegToReg(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MBBI,
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unsigned DestReg, unsigned SrcReg,
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const TargetRegisterClass *RC) const {
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abort();
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assert (RC == SparcV8::IntRegsRegisterClass
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&& "Can only copy 32-bit registers");
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MBB.insert (MBBI,
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BuildMI (V8::ORrr, 3, DestReg).addReg (V8::G0).addReg (SrcReg));
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return -1;
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}
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void SparcV8RegisterInfo::
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eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
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MachineBasicBlock::iterator I) const {
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std::cerr
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<< "Sorry, I don't know how to eliminate call frame pseudo instrs yet, in\n"
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<< __FUNCTION__ << " at " << __FILE__ << ":" << __LINE__ << "\n";
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abort();
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}
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void
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SparcV8RegisterInfo::eliminateFrameIndex(MachineFunction &MF,
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MachineBasicBlock::iterator II) const {
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unsigned i = 0;
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MachineInstr &MI = *II;
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while (!MI.getOperand(i).isFrameIndex()) {
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++i;
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assert(i < MI.getNumOperands() && "Instr doesn't have FrameIndex operand!");
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}
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int FrameIndex = MI.getOperand(i).getFrameIndex();
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std::cerr
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<< "Sorry, I don't know how to eliminate frame indices yet\n"
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<< "Frame index was " << FrameIndex << ", in\n"
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<< __FUNCTION__ << "() at " << __FILE__ << ":" << __LINE__ << "\n";
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abort();
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}
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@ -68,10 +96,22 @@ processFunctionBeforeFrameFinalized(MachineFunction &MF) const {}
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void SparcV8RegisterInfo::emitPrologue(MachineFunction &MF) const {
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MachineBasicBlock &MBB = MF.front();
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MachineFrameInfo *MFI = MF.getFrameInfo();
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// Eventually this should emit the correct save instruction based on the
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// number of bytes in the frame. For now we just hardcode it.
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BuildMI(MBB, MBB.begin(), V8::SAVEri, 2, V8::SP).addImm(-112).addReg(V8::SP);
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// Get the number of bytes to allocate from the FrameInfo
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int NumBytes = (int) MFI->getStackSize();
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// Emit the correct save instruction based on the number of bytes in the frame.
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// Minimum stack frame size according to V8 ABI is:
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// 16 words for register window spill
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// 1 word for address of returned aggregate-value
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// + 6 words for passing parameters on the stack
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// ----------
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// 23 words * 4 bytes per word = 92 bytes
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NumBytes += 92;
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NumBytes = (NumBytes + 3) & ~3; // Round up to next word boundary
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BuildMI(MBB, MBB.begin(), V8::SAVEri, 2,
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V8::SP).addImm(-NumBytes).addReg(V8::SP);
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}
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void SparcV8RegisterInfo::emitEpilogue(MachineFunction &MF,
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@ -82,7 +122,6 @@ void SparcV8RegisterInfo::emitEpilogue(MachineFunction &MF,
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BuildMI(MBB, MBBI, V8::RESTORErr, 2, V8::G0).addReg(V8::G0).addReg(V8::G0);
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}
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#include "SparcV8GenRegisterInfo.inc"
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const TargetRegisterClass*
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@ -15,6 +15,7 @@
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#include "SparcV8RegisterInfo.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/Type.h"
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#include "Support/STLExtras.h"
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using namespace llvm;
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@ -29,8 +30,12 @@ int SparcV8RegisterInfo::storeRegToStackSlot(
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unsigned SrcReg, int FrameIdx,
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const TargetRegisterClass *RC) const
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{
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abort();
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return -1;
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assert (RC == SparcV8::IntRegsRegisterClass
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&& "Can only store 32-bit values to stack slots");
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MachineInstr *I =
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BuildMI (V8::STrm, 2).addFrameIndex (FrameIdx).addReg (SrcReg);
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MBB.insert(MBBI, I);
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return 1;
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}
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int SparcV8RegisterInfo::loadRegFromStackSlot(
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@ -39,27 +44,50 @@ int SparcV8RegisterInfo::loadRegFromStackSlot(
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unsigned DestReg, int FrameIdx,
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const TargetRegisterClass *RC) const
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{
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abort();
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return -1;
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assert (RC == SparcV8::IntRegsRegisterClass
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&& "Can only load 32-bit registers from stack slots");
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MachineInstr *I =
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BuildMI (V8::LDmr, 2).addReg (DestReg).addFrameIndex (FrameIdx);
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MBB.insert(MBBI, I);
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return 1;
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}
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int SparcV8RegisterInfo::copyRegToReg(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MBBI,
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unsigned DestReg, unsigned SrcReg,
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const TargetRegisterClass *RC) const {
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abort();
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assert (RC == SparcV8::IntRegsRegisterClass
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&& "Can only copy 32-bit registers");
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MBB.insert (MBBI,
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BuildMI (V8::ORrr, 3, DestReg).addReg (V8::G0).addReg (SrcReg));
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return -1;
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}
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void SparcV8RegisterInfo::
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eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
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MachineBasicBlock::iterator I) const {
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std::cerr
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<< "Sorry, I don't know how to eliminate call frame pseudo instrs yet, in\n"
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<< __FUNCTION__ << " at " << __FILE__ << ":" << __LINE__ << "\n";
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abort();
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}
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void
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SparcV8RegisterInfo::eliminateFrameIndex(MachineFunction &MF,
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MachineBasicBlock::iterator II) const {
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unsigned i = 0;
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MachineInstr &MI = *II;
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while (!MI.getOperand(i).isFrameIndex()) {
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++i;
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assert(i < MI.getNumOperands() && "Instr doesn't have FrameIndex operand!");
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}
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int FrameIndex = MI.getOperand(i).getFrameIndex();
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std::cerr
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<< "Sorry, I don't know how to eliminate frame indices yet\n"
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<< "Frame index was " << FrameIndex << ", in\n"
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<< __FUNCTION__ << "() at " << __FILE__ << ":" << __LINE__ << "\n";
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abort();
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}
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@ -68,10 +96,22 @@ processFunctionBeforeFrameFinalized(MachineFunction &MF) const {}
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void SparcV8RegisterInfo::emitPrologue(MachineFunction &MF) const {
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MachineBasicBlock &MBB = MF.front();
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MachineFrameInfo *MFI = MF.getFrameInfo();
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// Eventually this should emit the correct save instruction based on the
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// number of bytes in the frame. For now we just hardcode it.
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BuildMI(MBB, MBB.begin(), V8::SAVEri, 2, V8::SP).addImm(-112).addReg(V8::SP);
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// Get the number of bytes to allocate from the FrameInfo
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int NumBytes = (int) MFI->getStackSize();
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// Emit the correct save instruction based on the number of bytes in the frame.
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// Minimum stack frame size according to V8 ABI is:
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// 16 words for register window spill
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// 1 word for address of returned aggregate-value
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// + 6 words for passing parameters on the stack
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// ----------
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// 23 words * 4 bytes per word = 92 bytes
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NumBytes += 92;
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NumBytes = (NumBytes + 3) & ~3; // Round up to next word boundary
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BuildMI(MBB, MBB.begin(), V8::SAVEri, 2,
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V8::SP).addImm(-NumBytes).addReg(V8::SP);
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}
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void SparcV8RegisterInfo::emitEpilogue(MachineFunction &MF,
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@ -82,7 +122,6 @@ void SparcV8RegisterInfo::emitEpilogue(MachineFunction &MF,
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BuildMI(MBB, MBBI, V8::RESTORErr, 2, V8::G0).addReg(V8::G0).addReg(V8::G0);
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}
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#include "SparcV8GenRegisterInfo.inc"
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const TargetRegisterClass*
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