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Fixed a bug in spill cost estimation

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1500 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Ruchira Sasanka 2002-01-08 16:29:23 +00:00
parent 6a3db8c117
commit ce773da223
2 changed files with 12 additions and 8 deletions
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10
lib/CodeGen/RegAlloc/RegClass.cpp
View File

@ -150,9 +150,9 @@ IGNode * RegClass::getIGNodeWithMinSpillCost()
{
unsigned int IGNodeListSize = IG.getIGNodeList().size();
long MinSpillCost = -1;
double MinSpillCost;
IGNode *MinCostIGNode = NULL;
bool isFirstNode = true;
// pass over IGNodeList to find the IGNode with minimum spill cost
// among all IGNodes that are not yet pushed on to the stack
@ -165,11 +165,13 @@ IGNode * RegClass::getIGNodeWithMinSpillCost()
if( ! IGNode->isOnStack() ) {
long SpillCost = (long) IGNode->getParentLR()->getSpillCost();
double SpillCost = (double) IGNode->getParentLR()->getSpillCost() /
(double) (IGNode->getCurDegree() + 1);
if( MinSpillCost == -1) { // for the first IG node
if( isFirstNode ) { // for the first IG node
MinSpillCost = SpillCost;
MinCostIGNode = IGNode;
isFirstNode = false;
}
else if( MinSpillCost > SpillCost) {

10
lib/Target/SparcV9/RegAlloc/RegClass.cpp
View File

@ -150,9 +150,9 @@ IGNode * RegClass::getIGNodeWithMinSpillCost()
{
unsigned int IGNodeListSize = IG.getIGNodeList().size();
long MinSpillCost = -1;
double MinSpillCost;
IGNode *MinCostIGNode = NULL;
bool isFirstNode = true;
// pass over IGNodeList to find the IGNode with minimum spill cost
// among all IGNodes that are not yet pushed on to the stack
@ -165,11 +165,13 @@ IGNode * RegClass::getIGNodeWithMinSpillCost()
if( ! IGNode->isOnStack() ) {
long SpillCost = (long) IGNode->getParentLR()->getSpillCost();
double SpillCost = (double) IGNode->getParentLR()->getSpillCost() /
(double) (IGNode->getCurDegree() + 1);
if( MinSpillCost == -1) { // for the first IG node
if( isFirstNode ) { // for the first IG node
MinSpillCost = SpillCost;
MinCostIGNode = IGNode;
isFirstNode = false;
}
else if( MinSpillCost > SpillCost) {