diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/RegisterCoalescer.cpp | 22 |
1 files changed, 0 insertions, 22 deletions
diff --git a/llvm/lib/CodeGen/RegisterCoalescer.cpp b/llvm/lib/CodeGen/RegisterCoalescer.cpp index 4f302773170..7ef525d9f3c 100644 --- a/llvm/lib/CodeGen/RegisterCoalescer.cpp +++ b/llvm/lib/CodeGen/RegisterCoalescer.cpp @@ -398,11 +398,6 @@ bool RegisterCoalescer::adjustCopiesBackFrom(const CoalescerPair &CP, assert(!CP.isPartial() && "This doesn't work for partial copies."); assert(!CP.isPhys() && "This doesn't work for physreg copies."); - // Bail if there is no dst interval - can happen when merging physical subreg - // operations. - if (!LIS->hasInterval(CP.getDstReg())) - return false; - LiveInterval &IntA = LIS->getInterval(CP.isFlipped() ? CP.getDstReg() : CP.getSrcReg()); LiveInterval &IntB = @@ -464,19 +459,6 @@ bool RegisterCoalescer::adjustCopiesBackFrom(const CoalescerPair &CP, // two value numbers. IntB.addRange(LiveRange(FillerStart, FillerEnd, BValNo)); - // If the IntB live range is assigned to a physical register, and if that - // physreg has sub-registers, update their live intervals as well. - if (TargetRegisterInfo::isPhysicalRegister(IntB.reg)) { - for (MCSubRegIterator SR(IntB.reg, TRI); SR.isValid(); ++SR) { - if (!LIS->hasInterval(*SR)) - continue; - LiveInterval &SRLI = LIS->getInterval(*SR); - SRLI.addRange(LiveRange(FillerStart, FillerEnd, - SRLI.getNextValue(FillerStart, - LIS->getVNInfoAllocator()))); - } - } - // Okay, merge "B1" into the same value number as "B0". if (BValNo != ValLR->valno) { // If B1 is killed by a PHI, then the merged live range must also be killed @@ -558,10 +540,6 @@ bool RegisterCoalescer::removeCopyByCommutingDef(const CoalescerPair &CP, MachineInstr *CopyMI) { assert (!CP.isPhys()); - // Bail if there is no dst interval. - if (!LIS->hasInterval(CP.getDstReg())) - return false; - SlotIndex CopyIdx = LIS->getInstructionIndex(CopyMI).getRegSlot(); LiveInterval &IntA = |
