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-rw-r--r--llvm/lib/MC/MCDisassembler/Disassembler.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/MC/MCDisassembler/Disassembler.cpp b/llvm/lib/MC/MCDisassembler/Disassembler.cpp
index 406ee5b7db9..115af8d45b7 100644
--- a/llvm/lib/MC/MCDisassembler/Disassembler.cpp
+++ b/llvm/lib/MC/MCDisassembler/Disassembler.cpp
@@ -191,7 +191,9 @@ static int getLatency(LLVMDisasmContext *DC, const MCInst &Inst) {
const MCInstrDesc& Desc = DC->getInstrInfo()->get(Inst.getOpcode());
unsigned SCClass = Desc.getSchedClass();
const MCSchedClassDesc *SCDesc = SCModel->getSchedClassDesc(SCClass);
- if (!SCDesc || !SCDesc->isValid())
+ // Resolving the variant SchedClass requires an MI to pass to
+ // SubTargetInfo::resolveSchedClass.
+ if (!SCDesc || !SCDesc->isValid() || SCDesc->isVariant())
return NoInformationAvailable;
// Compute output latency.
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