Changes in directory llvm/lib/CodeGen:
LiveIntervalAnalysis.cpp updated: 1.228 -> 1.229 --- Log message: Fix for PR1279: http://llvm.org/PR1279 . Dead def has a live interval of length 1. Copy coalescing should not violate that. --- Diffs of the changes: (+5 -3) LiveIntervalAnalysis.cpp | 8 +++++--- 1 files changed, 5 insertions(+), 3 deletions(-) Index: llvm/lib/CodeGen/LiveIntervalAnalysis.cpp diff -u llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.228 llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.229 --- llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.228 Mon Mar 26 17:40:42 2007 +++ llvm/lib/CodeGen/LiveIntervalAnalysis.cpp Tue Mar 27 20:30:37 2007 @@ -935,9 +935,9 @@ // The instruction which defines the src is only truly dead if there are // no intermediate uses and there isn't a use beyond the copy. // FIXME: find the last use, mark is kill and shorten the live range. - if (SrcEnd > getDefIndex(CopyIdx)) + if (SrcEnd > getDefIndex(CopyIdx)) { isDead = false; - else { + } else { MachineOperand *MOU; MachineInstr *LastUse= lastRegisterUse(repSrcReg, SrcStart, CopyIdx, MOU); if (LastUse) { @@ -947,7 +947,9 @@ isShorten = true; RemoveStart = getDefIndex(getInstructionIndex(LastUse)); RemoveEnd = SrcEnd; - } + } else if (RemoveStart > 0) + // A dead def should have a single cycle interval. + ++RemoveStart; } } _______________________________________________ llvm-commits mailing list llvm-commits@cs.uiuc.edu http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
