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Add support for many of the MRegisterInfo callbacks.

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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
This commit is contained in:
Brian Gaeke 2004-04-02 20:53:37 +00:00
parent 8542e08d15
commit 6c5526e56e
2 changed files with 96 additions and 18 deletions
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57
lib/Target/Sparc/SparcRegisterInfo.cpp
View File

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

57
lib/Target/SparcV8/SparcV8RegisterInfo.cpp
View File

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