MCInstrAnalysis: Don't crash on instructions with no operands.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140027 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/MC/MCInstrAnalysis.cpp b/lib/MC/MCInstrAnalysis.cpp
index 03a35c597be50f438452bcd32df49dbfa31c9b0e..7736702f35a47db6c4fdbd8b4b14a6f0892a66bb 100644 (file)
--- a/lib/MC/MCInstrAnalysis.cpp
+++ b/lib/MC/MCInstrAnalysis.cpp
@@ -12,7 +12,8 @@ using namespace llvm;
 
 uint64_t MCInstrAnalysis::evaluateBranch(const MCInst &Inst, uint64_t Addr,
                                          uint64_t Size) const {
-  if (Info->get(Inst.getOpcode()).OpInfo[0].OperandType != MCOI::OPERAND_PCREL)
+  if (Inst.getNumOperands() == 0 ||
+      Info->get(Inst.getOpcode()).OpInfo[0].OperandType != MCOI::OPERAND_PCREL)
     return -1ULL;
 
   int64_t Imm = Inst.getOperand(0).getImm();