-#include "llvm/CodeGen/IGNode.h"
-#include "SparcInternals.h"
+//===-- SparcRegClassInfo.cpp - Register class def'ns for Sparc -----------===//
+//
+// This file defines the register classes used by the Sparc target description.
+//
+//===----------------------------------------------------------------------===//
+#include "SparcRegClassInfo.h"
+#include "llvm/CodeGen/RegAllocCommon.h"
#include "llvm/Target/Sparc.h"
+#include "llvm/Type.h"
+using std::cerr;
+using std::vector;
//-----------------------------------------------------------------------------
// Int Register Class - method for coloring a node in the interference graph.
// If both above fail, spill.
//
//-----------------------------------------------------------------------------
-void SparcIntRegClass::colorIGNode(IGNode * Node, bool IsColorUsedArr[]) const
-{
- LiveRange * LR = Node->getParentLR();
- unsigned NumNeighbors = Node->getNumOfNeighbors(); // total # of neighbors
-
- for(unsigned n=0; n < NumNeighbors; n++) { // for each neigh
- IGNode *NeighIGNode = Node->getAdjIGNode(n);
- LiveRange *NeighLR = NeighIGNode->getParentLR();
-
- if( NeighLR->hasColor() ) // if has a color
- IsColorUsedArr[ NeighLR->getColor() ] = true; // record that color
-
- else if( NeighLR->hasSuggestedColor() ) {
-
- // if the neighbout can use the suggested color
- if( NeighLR-> isSuggestedColorUsable() )
- IsColorUsedArr[ NeighLR->getSuggestedColor() ] = true;
- }
- }
+void SparcIntRegClass::colorIGNode(IGNode * Node, vector<bool> &IsColorUsedArr) const {
+ LiveRange *LR = Node->getParentLR();
if( DEBUG_RA ) {
- cout << "\nColoring LR [CallInt=" << LR->isCallInterference() <<"]:";
- LR->printSet();
+ cerr << "\nColoring LR [CallInt=" << LR->isCallInterference() <<"]:";
+ printSet(*LR);
}
if( LR->hasSuggestedColor() ) {
unsigned SugCol = LR->getSuggestedColor();
- if( ! IsColorUsedArr[ SugCol ] ) {
+ if (!IsColorUsedArr[SugCol]) {
if( LR->isSuggestedColorUsable() ) {
// there are no call interferences. Otherwise, it will get spilled.
if (DEBUG_RA)
- cout << "\n -Coloring with sug color: " << SugCol;
+ cerr << "\n -Coloring with sug color: " << SugCol;
LR->setColor( LR->getSuggestedColor() );
return;
}
else if(DEBUG_RA)
- cout << "\n Couldn't alloc Sug col - LR voloatile & calls interf";
+ cerr << "\n Couldn't alloc Sug col - LR voloatile & calls interf";
}
else if ( DEBUG_RA ) { // can't allocate the suggested col
cerr << " \n Could NOT allocate the suggested color (already used) ";
- LR->printSet(); cerr << endl;
+ printSet(*LR); cerr << "\n";
}
}
if( ! LR->isCallInterference() ) {
// start with volatiles (we can allocate volatiles safely)
- SearchStart = SparcIntRegOrder::StartOfAllRegs;
+ SearchStart = SparcIntRegClass::StartOfAllRegs;
}
else {
// start with non volatiles (no non-volatiles)
- SearchStart = SparcIntRegOrder::StartOfNonVolatileRegs;
+ SearchStart = SparcIntRegClass::StartOfNonVolatileRegs;
}
unsigned c=0; // color
// find first unused color
- for( c=SearchStart; c < SparcIntRegOrder::NumOfAvailRegs; c++) {
- if( ! IsColorUsedArr[ c ] ) { ColorFound = true; break; }
+ for( c=SearchStart; c < SparcIntRegClass::NumOfAvailRegs; c++) {
+ if(!IsColorUsedArr[c] ) { ColorFound = true; break; }
}
if( ColorFound) {
LR->setColor(c); // first color found in preffered order
- if (DEBUG_RA) cout << "\n Colored after first search with col " << c ;
+ if (DEBUG_RA) cerr << "\n Colored after first search with col " << c ;
}
// if color is not found because of call interference
else if( LR->isCallInterference() )
{
// start from 0 - try to find even a volatile this time
- SearchStart = SparcIntRegOrder::StartOfAllRegs;
+ SearchStart = SparcIntRegClass::StartOfAllRegs;
// find first unused volatile color
- for(c=SearchStart; c < SparcIntRegOrder::StartOfNonVolatileRegs; c++) {
+ for(c=SearchStart; c < SparcIntRegClass::StartOfNonVolatileRegs; c++) {
if( ! IsColorUsedArr[ c ] ) { ColorFound = true; break; }
}
- if( ColorFound) {
+ if (ColorFound) {
LR->setColor(c);
// get the live range corresponding to live var
// since LR span across calls, must save across calls
//
LR->markForSaveAcrossCalls();
- if(DEBUG_RA) cout << "\n Colored after SECOND search with col " << c ;
+ if(DEBUG_RA) cerr << "\n Colored after SECOND search with col " << c ;
}
}
// If we couldn't find a color regardless of call interference - i.e., we
// don't have either a volatile or non-volatile color left
//
- if( !ColorFound )
+ if (!ColorFound)
LR->markForSpill(); // no color found - must spill
-
-
- if( DEBUG_RA)
- UltraSparcRegInfo::printReg( LR );
-
}
// If a color is still not fond, mark for spilling
//
//----------------------------------------------------------------------------
-void SparcFloatRegClass::colorIGNode(IGNode * Node,bool IsColorUsedArr[]) const
-{
-
- LiveRange * LR = Node->getParentLR();
+void SparcFloatRegClass::colorIGNode(IGNode * Node,
+ vector<bool> &IsColorUsedArr) const{
+ LiveRange *LR = Node->getParentLR();
+
+ // Mark the second color for double-precision registers:
+ // This is UGLY and should be merged into nearly identical code
+ // in RegClass::colorIGNode that handles the first color.
+ //
unsigned NumNeighbors = Node->getNumOfNeighbors(); // total # of neighbors
-
for(unsigned n=0; n < NumNeighbors; n++) { // for each neigh
IGNode *NeighIGNode = Node->getAdjIGNode(n);
LiveRange *NeighLR = NeighIGNode->getParentLR();
+
+ if( NeighLR->hasColor() &&
+ NeighLR->getType() == Type::DoubleTy) {
+ IsColorUsedArr[ (NeighLR->getColor()) + 1 ] = true;
+
+ } else if (NeighLR->hasSuggestedColor() &&
+ NeighLR-> isSuggestedColorUsable() ) {
- if( NeighLR->hasColor() ) { // if neigh has a color
- IsColorUsedArr[ NeighLR->getColor() ] = true; // record that color
- if( NeighLR->getTypeID() == Type::DoubleTyID )
- IsColorUsedArr[ (NeighLR->getColor()) + 1 ] = true;
- }
- else if( NeighLR->hasSuggestedColor() ) { // if neigh has sugg color
-
- if( NeighLR-> isSuggestedColorUsable() ) {
-
- // if the neighbout can use the suggested color
-
+ // if the neighbour can use the suggested color
IsColorUsedArr[ NeighLR->getSuggestedColor() ] = true;
- if( NeighLR->getTypeID() == Type::DoubleTyID )
+ if (NeighLR->getType() == Type::DoubleTy)
IsColorUsedArr[ (NeighLR->getSuggestedColor()) + 1 ] = true;
- }
-
- }
-
+ }
}
-
// **NOTE: We don't check for call interferences in allocating suggested
// color in this class since ALL registers are volatile. If this fact
// changes, we should change the following part
//- see SparcIntRegClass::colorIGNode()
-
+ //
if( LR->hasSuggestedColor() ) {
if( ! IsColorUsedArr[ LR->getSuggestedColor() ] ) {
LR->setColor( LR->getSuggestedColor() );
return;
- }
- else if (DEBUG_RA) { // can't allocate the suggested col
+ } else if (DEBUG_RA) { // can't allocate the suggested col
cerr << " Could NOT allocate the suggested color for LR ";
- LR->printSet(); cerr << endl;
+ printSet(*LR); cerr << "\n";
}
}
int ColorFound = -1; // have we found a color yet?
bool isCallInterf = LR->isCallInterference();
- // if value is a double - search the double only reigon (f32 - f63)
+ // if value is a double - search the double only region (f32 - f63)
// i.e. we try to allocate f32 - f63 first for doubles since singles
// cannot go there. By doing that, we provide more space for singles
// in f0 - f31
//
- if( LR->getTypeID() == Type::DoubleTyID )
+ if (LR->getType() == Type::DoubleTy)
ColorFound = findFloatColor( LR, 32, 64, IsColorUsedArr );
if( ColorFound >= 0 ) { // if we could find a color
LR->setColor(ColorFound);
- if( DEBUG_RA) UltraSparcRegInfo::printReg( LR );
return;
- }
- else {
+ } else {
// if we didn't find a color becuase the LR was single precision or
// all f32-f63 range is filled, we try to allocate a register from
//if this Node is between calls (i.e., no call interferences )
if( ! isCallInterf ) {
// start with volatiles (we can allocate volatiles safely)
- SearchStart = SparcFloatRegOrder::StartOfAllRegs;
+ SearchStart = SparcFloatRegClass::StartOfAllRegs;
}
else {
// start with non volatiles (no non-volatiles)
- SearchStart = SparcFloatRegOrder::StartOfNonVolatileRegs;
+ SearchStart = SparcFloatRegClass::StartOfNonVolatileRegs;
}
ColorFound = findFloatColor( LR, SearchStart, 32, IsColorUsedArr );
if( ColorFound >= 0 ) { // if we could find a color
LR->setColor(ColorFound);
- if( DEBUG_RA) UltraSparcRegInfo::printReg( LR );
return;
}
else if( isCallInterf ) {
// color could be found.
// Now try to allocate even a volatile color
- ColorFound = findFloatColor( LR, SparcFloatRegOrder::StartOfAllRegs,
- SparcFloatRegOrder::StartOfNonVolatileRegs,
+ ColorFound = findFloatColor( LR, SparcFloatRegClass::StartOfAllRegs,
+ SparcFloatRegClass::StartOfNonVolatileRegs,
IsColorUsedArr);
}
-
-
if( ColorFound >= 0 ) {
- LR->setColor(ColorFound); // first color found in preffered order
+ LR->setColor(ColorFound); // first color found in prefered order
LR->markForSaveAcrossCalls();
- if( DEBUG_RA) UltraSparcRegInfo::printReg( LR );
- return;
+ } else {
+ // we are here because no color could be found
+ LR->markForSpill(); // no color found - must spill
}
-
-
- // we are here because no color could be found
-
- LR->markForSpill(); // no color found - must spill
- if( DEBUG_RA) UltraSparcRegInfo::printReg( LR );
-
}
-
//-----------------------------------------------------------------------------
// Helper method for coloring a node of Float Reg class.
// Finds the first available color in the range [Start,End] depending on the
// type of the Node (i.e., float/double)
//-----------------------------------------------------------------------------
-int SparcFloatRegClass::findFloatColor(const LiveRange *const LR,
- unsigned Start,
- unsigned End,
- bool IsColorUsedArr[] ) const {
+int SparcFloatRegClass::findFloatColor(const LiveRange *LR,
+ unsigned Start, unsigned End,
+ vector<bool> &IsColorUsedArr) const {
bool ColorFound = false;
unsigned c;
- if( LR->getTypeID() == Type::DoubleTyID ) {
-
+ if (LR->getType() == Type::DoubleTy) {
// find first unused color for a double
- for( c=Start; c < End ;c+= 2){
- if( ! IsColorUsedArr[ c ] && ! IsColorUsedArr[ c+1 ])
- { ColorFound=true; break; }
- }
-
+ for (c=Start; c < End ; c+= 2)
+ if (!IsColorUsedArr[c] && !IsColorUsedArr[c+1])
+ return c;
} else {
-
// find first unused color for a single
- for( c=Start; c < End; c++) {
- if( ! IsColorUsedArr[ c ] ) { ColorFound=true; break; }
- }
+ for (c = Start; c < End; c++)
+ if (!IsColorUsedArr[c])
+ return c;
}
- if( ColorFound ) return c;
- else return -1;
+ return -1;
}
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