diff options
| -rw-r--r-- | lib/Target/ARM/Disassembler/ARMDisassembler.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Target/ARM/Disassembler/ARMDisassembler.cpp b/lib/Target/ARM/Disassembler/ARMDisassembler.cpp index 9d4449a4aa..6b86e41c45 100644 --- a/lib/Target/ARM/Disassembler/ARMDisassembler.cpp +++ b/lib/Target/ARM/Disassembler/ARMDisassembler.cpp @@ -567,6 +567,10 @@ DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size, // code and mask operands so that we can apply them correctly // to the subsequent instructions. if (MI.getOpcode() == ARM::t2IT) { + // Nested IT blocks are UNPREDICTABLE. + if (!ITBlock.empty()) + return MCDisassembler::SoftFail; + // (3 - the number of trailing zeros) is the number of then / else. unsigned firstcond = MI.getOperand(0).getImm(); unsigned Mask = MI.getOperand(1).getImm(); |