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https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-19 19:29:31 +00:00
Refactor some code, pulling it out into a function. No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23839 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -101,6 +101,29 @@ bool LiveInterval::overlapsFrom(const LiveInterval& other,
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return false;
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}
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/// NontrivialOverlap - Check to see if the two live ranges specified by i and j
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/// overlap. If so, check to see if they have value numbers that are not
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/// iIdx/jIdx respectively. If both conditions are true, return true.
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static inline bool NontrivialOverlap(LiveInterval::Ranges::const_iterator i,
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LiveInterval::Ranges::const_iterator j,
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unsigned iIdx, unsigned jIdx) {
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if (i->start == j->start) {
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// If this is not the allowed value merge, we cannot join.
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if (i->ValId != iIdx || j->ValId != jIdx)
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return true;
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} else if (i->start < j->start) {
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if (i->end > j->start && i->ValId != iIdx || j->ValId != jIdx) {
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return true;
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}
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} else {
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if (j->end > i->start &&
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i->ValId != iIdx || j->ValId != jIdx)
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return true;
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}
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return false;
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}
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/// joinable - Two intervals are joinable if the either don't overlap at all
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/// or if the destination of the copy is a single assignment value, and it
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/// only overlaps with one value in the source interval.
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@ -125,21 +148,9 @@ bool LiveInterval::joinable(const LiveInterval &other, unsigned CopyIdx) const {
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}
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while (i != ie && j != je) {
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if (i->start == j->start) {
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// If this is not the allowed value merge, we cannot join.
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if (i->ValId != ThisValIdx || j->ValId != OtherValIdx)
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return false;
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} else if (i->start < j->start) {
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if (i->end > j->start) {
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if (i->ValId != ThisValIdx || j->ValId != OtherValIdx)
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return false;
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}
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} else {
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if (j->end > i->start) {
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if (i->ValId != ThisValIdx || j->ValId != OtherValIdx)
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return false;
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}
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}
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if (NontrivialOverlap(i, j, ThisValIdx, OtherValIdx))
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return false;
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if (i->end < j->end)
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++i;
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else
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