diff options
Diffstat (limited to 'llvm/lib/CodeGen/SplitKit.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SplitKit.cpp | 31 |
1 files changed, 5 insertions, 26 deletions
diff --git a/llvm/lib/CodeGen/SplitKit.cpp b/llvm/lib/CodeGen/SplitKit.cpp index 140a91ae..f270c3a 100644 --- a/llvm/lib/CodeGen/SplitKit.cpp +++ b/llvm/lib/CodeGen/SplitKit.cpp @@ -1352,34 +1352,13 @@ void SplitEditor::rewriteAssigned(bool ExtendRanges) { continue; // We may want to extend a live range for a partial redef, or for a use // tied to an early clobber. - if (!Edit->getParent().liveAt(Idx.getPrevSlot())) + Idx = Idx.getPrevSlot(); + if (!Edit->getParent().liveAt(Idx)) continue; - } else { - assert(MO.isUse()); - bool IsEarlyClobber = false; - if (MO.isTied()) { - // We want to extend a live range into `e` slot rather than `r` slot if - // tied-def is early clobber, because the `e` slot already contained - // in the live range of early-clobber tied-def operand, give an example - // here: - // 0 %0 = ... - // 16 early-clobber %0 = Op %0 (tied-def 0), ... - // 32 ... = Op %0 - // Before extend: - // %0 = [0r, 0d) [16e, 32d) - // The point we want to extend is 0d to 16e not 16r in this case, but if - // we use 16r here we will extend nothing because that already contained - // in [16e, 32d). - unsigned OpIdx = MI->getOperandNo(&MO); - unsigned DefOpIdx = MI->findTiedOperandIdx(OpIdx); - const MachineOperand &DefOp = MI->getOperand(DefOpIdx); - IsEarlyClobber = DefOp.isEarlyClobber(); - } - - Idx = Idx.getRegSlot(IsEarlyClobber); - } + } else + Idx = Idx.getRegSlot(true); - SlotIndex Next = Idx; + SlotIndex Next = Idx.getNextSlot(); if (LI.hasSubRanges()) { // We have to delay extending subranges until we have seen all operands // defining the register. This is because a <def,read-undef> operand |