6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-30 04:35:00 +00:00
Code Issues Projects Releases Wiki Activity

Banksel optimization is now based on the section names of symbols, since the symbols in one section will always be put into one bank.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66761 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sanjiv Gupta 2009-03-12 02:10:45 +00:00
parent 1379cadf8d
commit d076570a66
1 changed files with 54 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

96
lib/Target/PIC16/PIC16AsmPrinter.cpp
View File

@ -25,60 +25,63 @@
using namespace llvm; using namespace llvm;
#include "PIC16GenAsmWriter.inc" #include "PIC16GenAsmWriter.inc"
bool PIC16AsmPrinter::inSameBank (char *s1, char *s2){
assert (s1 && s2 && "Null pointer assignment"); inline static bool isLocalToFunc (std::string &FuncName, std::string &VarName) {
if (VarName.find(FuncName + ".auto.") != std::string::npos
if ((*s1 == '.') && (*s2 == '.')) { //skip if they both start with '.' || VarName.find(FuncName + ".arg.") != std::string::npos)
s1++; return true;
s2++;
} return false;
while (*s1 && *s2) { }
if (*s1 != *s2)
goto _NotInSameBank; inline static bool isLocalName (std::string &Name) {
if (Name.find(".auto.") != std::string::npos
if ((*s1 == '.') && (*s2 == '.')) //both symbols in same function || Name.find(".arg.") != std::string::npos)
goto _InSameBank; //in the same bank
s1++;
s2++;
}
if (*s1 && *s1) {
_InSameBank:
return true; return true;
}
_NotInSameBank:
return false; return false;
} }
bool PIC16AsmPrinter::printMachineInstruction(const MachineInstr *MI) { bool PIC16AsmPrinter::printMachineInstruction(const MachineInstr *MI) {
std::string NewBankselLabel; std::string NewBank = "";
unsigned Operands = MI->getNumOperands(); unsigned Operands = MI->getNumOperands();
if (Operands > 1) { if (Operands > 1) {
// Global address or external symbol should be second operand from last // Global address or external symbol should be second operand from last
// if we want to print banksel for it. // if we want to print banksel for it.
const MachineOperand &Op = MI->getOperand(Operands-2); unsigned BankSelVar = Operands - 2;
// In cases where an instruction has a def or use defined in td file,
// that def or use becomes a machine instruction operand.
// eg. addfw_1 instruction defines STATUS register. So the machine
// instruction for it has MO_Register Operand as its last operand.
while ((MI->getOperand(BankSelVar + 1).getType() ==
MachineOperand::MO_Register) && (BankSelVar > 0))
BankSelVar--;
const MachineOperand &Op = MI->getOperand(BankSelVar);
unsigned OpType = Op.getType(); unsigned OpType = Op.getType();
if (OpType == MachineOperand::MO_GlobalAddress || if (OpType == MachineOperand::MO_GlobalAddress ||
OpType == MachineOperand::MO_ExternalSymbol) { OpType == MachineOperand::MO_ExternalSymbol) {
if (OpType == MachineOperand::MO_GlobalAddress ) if (OpType == MachineOperand::MO_GlobalAddress )
NewBankselLabel = Mang->getValueName(Op.getGlobal()); NewBank = Op.getGlobal()->getSection();
else else {
NewBankselLabel = Op.getSymbolName(); // External Symbol is generated for temp data. Temp data in in
// fdata.<functionname>.# section.
NewBank = "fdata." + CurrentFnName +".#";
}
// Operand after global address or external symbol should be banksel. // Operand after global address or external symbol should be banksel.
// Value 1 for this operand means we need to generate banksel else do not // Value 1 for this operand means we need to generate banksel else do not
// generate banksel. // generate banksel.
const MachineOperand &BS = MI->getOperand(Operands-1); const MachineOperand &BS = MI->getOperand(BankSelVar+1);
// If Section names are same then the variables are in same section.
// This is not true for external variables as section names for global
// variables in all files are same at this time. For eg. initialized
// data in put in idata.# section in all files.
if (((int)BS.getImm() == 1) && if (((int)BS.getImm() == 1) &&
(!inSameBank ((char *)CurrentBankselLabelInBasicBlock.c_str(), ((Op.isGlobal() && Op.getGlobal()->hasExternalLinkage()) ||
(char *)NewBankselLabel.c_str()))) { (NewBank.compare(CurBank) != 0))) {
CurrentBankselLabelInBasicBlock = NewBankselLabel;
O << "\tbanksel "; O << "\tbanksel ";
printOperand(MI, Operands-2); printOperand(MI, BankSelVar);
O << "\n"; O << "\n";
CurBank = NewBank;
} }
} }
} }
@ -119,7 +122,7 @@ bool PIC16AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
} }
else else
O << CurrentFnName << ":\n"; O << CurrentFnName << ":\n";
CurrentBankselLabelInBasicBlock = ""; CurBank = "";
for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end(); for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
II != E; ++II) { II != E; ++II) {
// Print the assembly for the instruction. // Print the assembly for the instruction.
@ -219,7 +222,7 @@ void PIC16AsmPrinter::EmitExternsAndGlobals (Module &M) {
// Any variables reaching here with ".auto." in its name is a local scope // Any variables reaching here with ".auto." in its name is a local scope
// variable and should not be printed in global data section. // variable and should not be printed in global data section.
std::string Name = Mang->getValueName(I); std::string Name = Mang->getValueName(I);
if (Name.find(".auto.") != std::string::npos) if (isLocalName (Name))
continue; continue;
if (I->isDeclaration()) if (I->isDeclaration())
@ -231,7 +234,7 @@ void PIC16AsmPrinter::EmitExternsAndGlobals (Module &M) {
void PIC16AsmPrinter::EmitInitData (Module &M) { void PIC16AsmPrinter::EmitInitData (Module &M) {
SwitchToSection(TAI->getDataSection()); SwitchToSection(TAI->getDataSection());
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); for (Module::global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) { I != E; ++I) {
if (!I->hasInitializer()) // External global require no code. if (!I->hasInitializer()) // External global require no code.
continue; continue;
@ -247,11 +250,12 @@ void PIC16AsmPrinter::EmitInitData (Module &M) {
// Any variables reaching here with "." in its name is a local scope // Any variables reaching here with "." in its name is a local scope
// variable and should not be printed in global data section. // variable and should not be printed in global data section.
std::string name = Mang->getValueName(I); std::string Name = Mang->getValueName(I);
if (name.find(".auto.") != std::string::npos) if (isLocalName(Name))
continue; continue;
O << name; I->setSection(TAI->getDataSection()->getName());
O << Name;
EmitGlobalConstant(C, AddrSpace); EmitGlobalConstant(C, AddrSpace);
} }
} }
@ -261,7 +265,7 @@ void PIC16AsmPrinter::EmitRomData (Module &M)
{ {
SwitchToSection(TAI->getReadOnlySection()); SwitchToSection(TAI->getReadOnlySection());
IsRomData = true; IsRomData = true;
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); for (Module::global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) { I != E; ++I) {
if (!I->hasInitializer()) // External global require no code. if (!I->hasInitializer()) // External global require no code.
continue; continue;
@ -280,6 +284,7 @@ void PIC16AsmPrinter::EmitRomData (Module &M)
if (name.find(".") != std::string::npos) if (name.find(".") != std::string::npos)
continue; continue;
I->setSection(TAI->getReadOnlySection()->getName());
O << name; O << name;
EmitGlobalConstant(C, AddrSpace); EmitGlobalConstant(C, AddrSpace);
O << "\n"; O << "\n";
@ -293,7 +298,7 @@ void PIC16AsmPrinter::EmitUnInitData (Module &M)
SwitchToSection(TAI->getBSSSection_()); SwitchToSection(TAI->getBSSSection_());
const TargetData *TD = TM.getTargetData(); const TargetData *TD = TM.getTargetData();
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); for (Module::global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) { I != E; ++I) {
if (!I->hasInitializer()) // External global require no code. if (!I->hasInitializer()) // External global require no code.
continue; continue;
@ -310,6 +315,8 @@ void PIC16AsmPrinter::EmitUnInitData (Module &M)
if (name.find(".") != std::string::npos) if (name.find(".") != std::string::npos)
continue; continue;
I->setSection(TAI->getBSSSection_()->getName());
const Type *Ty = C->getType(); const Type *Ty = C->getType();
unsigned Size = TD->getTypePaddedSize(Ty); unsigned Size = TD->getTypePaddedSize(Ty);
@ -328,7 +335,7 @@ bool PIC16AsmPrinter::doFinalization(Module &M) {
void PIC16AsmPrinter::emitFunctionData(MachineFunction &MF) { void PIC16AsmPrinter::emitFunctionData(MachineFunction &MF) {
const Function *F = MF.getFunction(); const Function *F = MF.getFunction();
std::string FuncName = Mang->getValueName(F); std::string FuncName = Mang->getValueName(F);
const Module *M = F->getParent(); Module *M = const_cast<Module *>(F->getParent());
const TargetData *TD = TM.getTargetData(); const TargetData *TD = TM.getTargetData();
unsigned FrameSize = 0; unsigned FrameSize = 0;
// Emit the data section name. // Emit the data section name.
@ -354,7 +361,7 @@ void PIC16AsmPrinter::emitFunctionData(MachineFunction &MF) {
// Therefore to get the variable belonging to this function entire // Therefore to get the variable belonging to this function entire
// global list will be traversed and variables belonging to this function // global list will be traversed and variables belonging to this function
// will be emitted in the current data section. // will be emitted in the current data section.
for (Module::const_global_iterator I = M->global_begin(), E = M->global_end(); for (Module::global_iterator I = M->global_begin(), E = M->global_end();
I != E; ++I) { I != E; ++I) {
std::string VarName = Mang->getValueName(I); std::string VarName = Mang->getValueName(I);
@ -363,9 +370,10 @@ void PIC16AsmPrinter::emitFunctionData(MachineFunction &MF) {
// Static local varilabes of a function does not have .auto. in their // Static local varilabes of a function does not have .auto. in their
// name. They are not printed as part of function data but module // name. They are not printed as part of function data but module
// level global data. // level global data.
if (!(VarName.find(FuncName + ".auto.") == 0 ? true : false)) if (! isLocalToFunc(FuncName, VarName))
continue; continue;
I->setSection("fdata." + CurrentFnName + ".#");
Constant *C = I->getInitializer(); Constant *C = I->getInitializer();
const Type *Ty = C->getType(); const Type *Ty = C->getType();
unsigned Size = TD->getTypePaddedSize(Ty); unsigned Size = TD->getTypePaddedSize(Ty);