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Strengthen the previous check.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64076 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -272,17 +272,15 @@ namespace llvm {
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return I != kills.end() && *I == KillIdx;
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}
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/// isOnlyKill - Return true if the specified index is the only kill of the
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/// specified val#.
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static bool isOnlyKill(const VNInfo *VNI, unsigned KillIdx) {
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bool Found = false;
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const SmallVector<unsigned, 4> &kills = VNI->kills;
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for (unsigned i = 0, e = kills.size(); i != e; ++i) {
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if (KillIdx != kills[i])
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/// isOnlyLROfValNo - Return true if the specified live range is the only
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/// one defined by the its val#.
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bool isOnlyLROfValNo( const LiveRange *LR) {
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for (const_iterator I = begin(), E = end(); I != E; ++I) {
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const LiveRange *Tmp = I;
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if (Tmp != LR && Tmp->valno == LR->valno)
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return false;
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Found = true;
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}
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return Found;
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return true;
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}
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/// MergeValueNumberInto - This method is called when two value nubmers
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@ -489,7 +489,7 @@ static void removeRange(LiveInterval &li, unsigned Start, unsigned End,
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}
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/// TrimLiveIntervalToLastUse - If there is a last use in the same basic block
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/// as the copy instruction, trim the ive interval to the last use and return
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/// as the copy instruction, trim the live interval to the last use and return
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/// true.
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bool
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SimpleRegisterCoalescing::TrimLiveIntervalToLastUse(unsigned CopyIdx,
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@ -867,9 +867,10 @@ SimpleRegisterCoalescing::ShortenDeadCopySrcLiveRange(LiveInterval &li,
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if (LR->valno->def == RemoveStart) {
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// If the def MI defines the val# and this copy is the only kill of the
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// val#, then propagate the dead marker.
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if (!li.isOnlyKill(LR->valno, RemoveEnd))
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if (!li.isOnlyLROfValNo(LR)) {
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if (li.isKill(LR->valno, RemoveEnd))
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li.removeKill(LR->valno, RemoveEnd);
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else {
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} else {
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PropagateDeadness(li, CopyMI, RemoveStart, li_, tri_);
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++numDeadValNo;
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}
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