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Update kill info for uses of split intervals.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44531 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2007-12-03 09:58:48 +00:00
parent 96ea209b52
commit 70306f8348
2 changed files with 17 additions and 11 deletions
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5
lib/CodeGen/LiveIntervalAnalysis.cpp
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@@ -923,7 +923,6 @@ rewriteInstructionsForSpills(const LiveInterval &li, bool TrySplit,
unsigned NewVReg = 0;
unsigned index = getBaseIndex(I->start);
unsigned end = getBaseIndex(I->end-1) + InstrSlots::NUM;
bool TrySplitMI = TrySplit && vrm.getPreSplitReg(li.reg) == 0;
for (; index != end; index += InstrSlots::NUM) {
// skip deleted instructions
while (index != end && !getInstructionFromIndex(index))
@@ -933,7 +932,7 @@ rewriteInstructionsForSpills(const LiveInterval &li, bool TrySplit,
MachineInstr *MI = getInstructionFromIndex(index);
MachineBasicBlock *MBB = MI->getParent();
NewVReg = 0;
if (TrySplitMI) {
if (TrySplit) {
std::map<unsigned,unsigned>::const_iterator NVI =
MBBVRegsMap.find(MBB->getNumber());
if (NVI != MBBVRegsMap.end()) {
@@ -977,7 +976,7 @@ rewriteInstructionsForSpills(const LiveInterval &li, bool TrySplit,
// Update weight of spill interval.
LiveInterval &nI = getOrCreateInterval(NewVReg);
if (!TrySplitMI) {
if (!TrySplit) {
// The spill weight is now infinity as it cannot be spilled again.
nI.weight = HUGE_VALF;
continue;