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| author | Evan Cheng <evan.cheng@apple.com> | 2010-10-28 01:46:29 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2010-10-28 01:46:29 +0000 |
| commit | 7c88cdcc3ba49101fa119ec3b403e9980934384e (patch) | |
| tree | 3ba1dcb2eb4d868c10872cfbb729677bb935f27d /lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp | |
| parent | e49406fd6399ac3ef38bde242ee7f1dca80f85d1 (diff) | |
Fix a major bug in operand latency computation. The use index must be adjusted
by the number of defs first for it to match the instruction itinerary.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117518 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp index 0ffb4da0f3..d34a52d801 100644 --- a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp +++ b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp @@ -454,6 +454,9 @@ void ScheduleDAGSDNodes::ComputeOperandLatency(SDNode *Def, SDNode *Use, return; unsigned DefIdx = Use->getOperand(OpIdx).getResNo(); + if (Use->isMachineOpcode()) + // Adjust the use operand index by num of defs. + OpIdx += TII->get(Use->getMachineOpcode()).getNumDefs(); int Latency = TII->getOperandLatency(InstrItins, Def, DefIdx, Use, OpIdx); if (Latency >= 0) dep.setLatency(Latency); |