diff options
Diffstat (limited to 'lib/CodeGen/RegAlloc/RegClass.cpp')
| -rw-r--r-- | lib/CodeGen/RegAlloc/RegClass.cpp | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/lib/CodeGen/RegAlloc/RegClass.cpp b/lib/CodeGen/RegAlloc/RegClass.cpp index 3ee79e328e..3918871d69 100644 --- a/lib/CodeGen/RegAlloc/RegClass.cpp +++ b/lib/CodeGen/RegAlloc/RegClass.cpp @@ -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) { |