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[TargetSchedule] Minor refactor in computeInstrLatency. NFC

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The intent of revision r300311 was to add a check for invalid scheduling class
descriptors. However, it ended up adding a redundant call in a basic block that
should not be reachable.

llvm-svn: 327231
This commit is contained in:
Andrea Di Biagio
2018-03-11 00:51:33 +00:00
parent 2282cc2a09
commit 6d18d6e4d3
1 changed files with 4 additions and 6 deletions
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10
llvm/lib/CodeGen/TargetSchedule.cpp
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@@ -274,14 +274,12 @@ unsigned TargetSchedModel::computeInstrLatency(unsigned Opcode) const {
unsigned SCIdx = TII->get(Opcode).getSchedClass();
const MCSchedClassDesc *SCDesc = SchedModel.getSchedClassDesc(SCIdx);
if (SCDesc->isValid() && !SCDesc->isVariant())
if (!SCDesc->isValid())
return 0;
if (!SCDesc->isVariant())
return computeInstrLatency(*SCDesc);
if (SCDesc->isValid()) {
assert (!SCDesc->isVariant() && "No MI sched latency: SCDesc->isVariant()");
return computeInstrLatency(*SCDesc);
}
return 0;
llvm_unreachable("No MI sched latency");
}
unsigned