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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 | 523fa3a2e88c4f7d47e77c86eb54a22e277ed471 (patch) | |
| tree | 3508a0faf2da336517f583648e0d3404293ec3fc /llvm/lib/CodeGen/SelectionDAG | |
| parent | d2b2ad093c3b4bc5205a4e9b407fde01d0649cc8 (diff) | |
| download | bcm5719-llvm-523fa3a2e88c4f7d47e77c86eb54a22e277ed471.tar.gz bcm5719-llvm-523fa3a2e88c4f7d47e77c86eb54a22e277ed471.zip | |
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.
llvm-svn: 117518
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp index 0ffb4da0f36..d34a52d8014 100644 --- a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp +++ b/llvm/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); |
