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Make SpillIs an optional pointer. Avoid creating a bunch of temporary SmallVectors.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127388 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2011-03-10 01:21:58 +00:00
parent 581d535af9
commit 38f6bd0fc8
10 changed files with 25 additions and 30 deletions
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lib/CodeGen/LiveIntervalAnalysis.cpp
+8 -8
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@@ -956,7 +956,7 @@ bool LiveIntervals::isValNoAvailableAt(const LiveInterval &li, MachineInstr *MI,
bool
LiveIntervals::isReMaterializable(const LiveInterval &li,
const VNInfo *ValNo, MachineInstr *MI,
const SmallVectorImpl<LiveInterval*> &SpillIs,
const SmallVectorImpl<LiveInterval*> *SpillIs,
bool &isLoad) {
if (DisableReMat)
return false;
@@ -983,9 +983,10 @@ LiveIntervals::isReMaterializable(const LiveInterval &li,
// If a register operand of the re-materialized instruction is going to
// be spilled next, then it's not legal to re-materialize this instruction.
for (unsigned i = 0, e = SpillIs.size(); i != e; ++i)
if (ImpUse == SpillIs[i]->reg)
return false;
if (SpillIs)
for (unsigned i = 0, e = SpillIs->size(); i != e; ++i)
if (ImpUse == (*SpillIs)[i]->reg)
return false;
}
return true;
}
@@ -994,16 +995,15 @@ LiveIntervals::isReMaterializable(const LiveInterval &li,
/// val# of the specified interval is re-materializable.
bool LiveIntervals::isReMaterializable(const LiveInterval &li,
const VNInfo *ValNo, MachineInstr *MI) {
SmallVector<LiveInterval*, 4> Dummy1;
bool Dummy2;
return isReMaterializable(li, ValNo, MI, Dummy1, Dummy2);
return isReMaterializable(li, ValNo, MI, 0, Dummy2);
}
/// isReMaterializable - Returns true if every definition of MI of every
/// val# of the specified interval is re-materializable.
bool
LiveIntervals::isReMaterializable(const LiveInterval &li,
const SmallVectorImpl<LiveInterval*> &SpillIs,
const SmallVectorImpl<LiveInterval*> *SpillIs,
bool &isLoad) {
isLoad = false;
for (LiveInterval::const_vni_iterator i = li.vni_begin(), e = li.vni_end();
@@ -1716,7 +1716,7 @@ static void normalizeSpillWeights(std::vector<LiveInterval*> &NewLIs) {
std::vector<LiveInterval*> LiveIntervals::
addIntervalsForSpills(const LiveInterval &li,
const SmallVectorImpl<LiveInterval*> &SpillIs,
const SmallVectorImpl<LiveInterval*> *SpillIs,
const MachineLoopInfo *loopInfo, VirtRegMap &vrm) {
assert(li.isSpillable() && "attempt to spill already spilled interval!");