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Reserve space in the ValueNumberInfo vector. This speeds up live interval

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analysis 16% on crafty.

Wrap long lines.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30012 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-09-01 06:10:18 +00:00
parent 0750bec272
commit 238416c99b
1 changed files with 10 additions and 10 deletions
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20
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -879,7 +879,6 @@ static unsigned ComputeUltimateVN(unsigned VN,
return ThisValNoAssignments[VN] = UltimateVN;
}
/// JoinIntervals - Attempt to join these two intervals. On failure, this
/// returns false. Otherwise, if one of the intervals being joined is a
/// physreg, this method always canonicalizes LHS to be it. The output
@ -893,7 +892,8 @@ bool LiveIntervals::JoinIntervals(LiveInterval &LHS, LiveInterval &RHS) {
SmallVector<std::pair<unsigned,unsigned>, 16> ValueNumberInfo;
LHSValNoAssignments.resize(LHS.getNumValNums(), -1);
RHSValNoAssignments.resize(RHS.getNumValNums(), -1);
ValueNumberInfo.reserve(LHS.getNumValNums() + RHS.getNumValNums());
// Compute ultimate value numbers for the LHS and RHS values.
if (RHS.containsOneValue()) {
// Copies from a liveinterval with a single value are simple to handle and
@ -950,8 +950,8 @@ bool LiveIntervals::JoinIntervals(LiveInterval &LHS, LiveInterval &RHS) {
RHSValNoAssignments[0] = RHSValID;
} else {
// Loop over the value numbers of the LHS, seeing if any are defined from the
// RHS.
// Loop over the value numbers of the LHS, seeing if any are defined from
// the RHS.
SmallVector<int, 16> LHSValsDefinedFromRHS;
LHSValsDefinedFromRHS.resize(LHS.getNumValNums(), -1);
for (unsigned VN = 0, e = LHS.getNumValNums(); VN != e; ++VN) {
@ -959,8 +959,8 @@ bool LiveIntervals::JoinIntervals(LiveInterval &LHS, LiveInterval &RHS) {
if (ValSrcReg == 0) // Src not defined by a copy?
continue;
// DstReg is known to be a register in the LHS interval. If the src is from
// the RHS interval, we can use its value #.
// DstReg is known to be a register in the LHS interval. If the src is
// from the RHS interval, we can use its value #.
if (rep(ValSrcReg) != RHS.reg)
continue;
@ -969,8 +969,8 @@ bool LiveIntervals::JoinIntervals(LiveInterval &LHS, LiveInterval &RHS) {
LHSValsDefinedFromRHS[VN] = RHS.getLiveRangeContaining(ValInst-1)->ValId;
}
// Loop over the value numbers of the RHS, seeing if any are defined from the
// LHS.
// Loop over the value numbers of the RHS, seeing if any are defined from
// the LHS.
SmallVector<int, 16> RHSValsDefinedFromLHS;
RHSValsDefinedFromLHS.resize(RHS.getNumValNums(), -1);
for (unsigned VN = 0, e = RHS.getNumValNums(); VN != e; ++VN) {
@ -978,8 +978,8 @@ bool LiveIntervals::JoinIntervals(LiveInterval &LHS, LiveInterval &RHS) {
if (ValSrcReg == 0) // Src not defined by a copy?
continue;
// DstReg is known to be a register in the RHS interval. If the src is from
// the LHS interval, we can use its value #.
// DstReg is known to be a register in the RHS interval. If the src is
// from the LHS interval, we can use its value #.
if (rep(ValSrcReg) != LHS.reg)
continue;