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Ignore DEBUG_VALUE when building live intervals;

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this makes the code work transparently the same
whether they're there or not.

llvm-svn: 94240
This commit is contained in:
Dale Johannesen 2010-01-22 22:38:21 +00:00
parent 576e41a375
commit b1ebe8137b
2 changed files with 11 additions and 4 deletions
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12
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -140,7 +140,10 @@ void LiveIntervals::printInstrs(raw_ostream &OS) const {
<< ":\t\t# derived from " << mbbi->getName() << "\n";
for (MachineBasicBlock::iterator mii = mbbi->begin(),
mie = mbbi->end(); mii != mie; ++mii) {
OS << getInstructionIndex(mii) << '\t' << *mii;
if (mii->getOpcode()==TargetInstrInfo::DEBUG_VALUE)
OS << SlotIndex::getEmptyKey() << '\t' << *mii;
else
OS << getInstructionIndex(mii) << '\t' << *mii;
}
}
}
@ -672,8 +675,6 @@ void LiveIntervals::computeIntervals() {
SlotIndex MIIndex = getMBBStartIdx(MBB);
DEBUG(dbgs() << MBB->getName() << ":\n");
MachineBasicBlock::iterator MI = MBB->begin(), miEnd = MBB->end();
// Create intervals for live-ins to this BB first.
for (MachineBasicBlock::const_livein_iterator LI = MBB->livein_begin(),
LE = MBB->livein_end(); LI != LE; ++LI) {
@ -689,8 +690,11 @@ void LiveIntervals::computeIntervals() {
if (getInstructionFromIndex(MIIndex) == 0)
MIIndex = indexes_->getNextNonNullIndex(MIIndex);
for (; MI != miEnd; ++MI) {
for (MachineBasicBlock::iterator MI = MBB->begin(), miEnd = MBB->end();
MI != miEnd; ++MI) {
DEBUG(dbgs() << MIIndex << "\t" << *MI);
if (MI->getOpcode()==TargetInstrInfo::DEBUG_VALUE)
continue;
// Handle defs.
for (int i = MI->getNumOperands() - 1; i >= 0; --i) {

3
lib/CodeGen/SlotIndexes.cpp
View File

@ -14,6 +14,7 @@
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Target/TargetInstrInfo.h"
using namespace llvm;
@ -107,6 +108,8 @@ bool SlotIndexes::runOnMachineFunction(MachineFunction &fn) {
for (MachineBasicBlock::iterator miItr = mbb->begin(), miEnd = mbb->end();
miItr != miEnd; ++miItr) {
MachineInstr *mi = &*miItr;
if (mi->getOpcode()==TargetInstrInfo::DEBUG_VALUE)
continue;
if (miItr == mbb->getFirstTerminator()) {
push_back(createEntry(0, index));