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Terminate all dead defs at the dead slot instead of the 'next' slot.

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This makes no difference for normal defs, but early clobber dead defs
now look like:

  [Slot_EarlyClobber; Slot_Dead)

instead of:

  [Slot_EarlyClobber; Slot_Register).

Live ranges for normal dead defs look like:

  [Slot_Register; Slot_Dead)

as before.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144512 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2011-11-13 22:42:13 +00:00
parent f9fd29ea34
commit 1f81e316b0
3 changed files with 8 additions and 8 deletions
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4
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -686,7 +686,7 @@ bool LiveIntervals::shrinkToUses(LiveInterval *li,
VNInfo *VNI = *I;
if (VNI->isUnused())
continue;
NewLI.addRange(LiveRange(VNI->def, VNI->def.getNextSlot(), VNI));
NewLI.addRange(LiveRange(VNI->def, VNI->def.getDeadSlot(), VNI));
// A use tied to an early-clobber def ends at the load slot and isn't caught
// above. Catch it here instead. This probably only ever happens for inline
@ -751,7 +751,7 @@ bool LiveIntervals::shrinkToUses(LiveInterval *li,
continue;
LiveInterval::iterator LII = NewLI.FindLiveRangeContaining(VNI->def);
assert(LII != NewLI.end() && "Missing live range for PHI");
if (LII->end != VNI->def.getNextSlot())
if (LII->end != VNI->def.getDeadSlot())
continue;
if (VNI->isPHIDef()) {
// This is a dead PHI. Remove it.