diff options
| -rw-r--r-- | lib/Target/ARM/Disassembler/ARMDisassembler.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/Target/ARM/Disassembler/ARMDisassembler.cpp b/lib/Target/ARM/Disassembler/ARMDisassembler.cpp index 6927d2d053..8dab153132 100644 --- a/lib/Target/ARM/Disassembler/ARMDisassembler.cpp +++ b/lib/Target/ARM/Disassembler/ARMDisassembler.cpp @@ -1111,7 +1111,11 @@ static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val, } // Empty register lists are not allowed. - if (CountPopulation_32(Val) == 0) return MCDisassembler::Fail; + uint32_t popcnt = CountPopulation_32(Val); + if (popcnt == 0) return MCDisassembler::Fail; + // and one-register lists are unpredictable. + else if (popcnt == 1) Check(S, MCDisassembler::SoftFail); + for (unsigned i = 0; i < 16; ++i) { if (Val & (1 << i)) { if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder))) |