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Simplify overlap check. 

llvm-svn: 157137
This commit is contained in:
Jakob Stoklund Olesen 2012-05-19 23:59:27 +00:00
parent a9e9ebcfb5
commit 4e1e43a355
1 changed files with 1 additions and 8 deletions
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9
llvm/lib/CodeGen/RegisterCoalescer.cpp
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@ -1397,15 +1397,8 @@ bool RegisterCoalescer::joinIntervals(CoalescerPair &CP) {
while (I != IE && J != JE) {
// Determine if these two live ranges overlap.
bool Overlaps;
if (I->start < J->start) {
Overlaps = I->end > J->start;
} else {
Overlaps = J->end > I->start;
}
// If so, check value # info to determine if they are really different.
if (Overlaps) {
if (I->end > J->start && J->end > I->start) {
// If the live range overlap will map to the same value number in the
// result liverange, we can still coalesce them. If not, we can't.
if (LHSValNoAssignments[I->valno->id] !=