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Fixed a bug in spill cost estimation

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llvm-svn: 1500
This commit is contained in:
Ruchira Sasanka 2002-01-08 16:29:23 +00:00
parent b6d7a004fa
commit 80acf30a7f
1 changed files with 6 additions and 4 deletions
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10
lib/CodeGen/RegAlloc/RegClass.cpp
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@ -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) {