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-rw-r--r--llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp b/llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
index 87a5f019d4a..912935db17a 100644
--- a/llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
+++ b/llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
@@ -4310,6 +4310,10 @@ static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
DecodeStatus S = MCDisassembler::Success;
+
+ if (Rt == Rn || Rn == Rt2)
+ S = MCDisassembler::SoftFail;
+
if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler::Fail;
if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
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