Tighten operand checking on memory barrier instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137176 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/Disassembler/ARMDisassembler.cpp b/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
index a3fa138..4e7e582 100644
--- a/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
+++ b/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
@@ -131,6 +131,8 @@
uint64_t Address, const void *Decoder);
static bool DecodeAddrMode3Offset(llvm::MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
+static bool DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
static bool DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
@@ -2268,8 +2270,7 @@
}
unsigned imm = fieldFromInstruction32(Insn, 0, 4);
- Inst.addOperand(MCOperand::CreateImm(imm));
- return true;
+ return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
}
unsigned brtarget = fieldFromInstruction32(Insn, 0, 11) << 1;
@@ -2347,3 +2348,24 @@
return true;
}
+
+static bool DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Val,
+ uint64_t Address, const void *Decoder) {
+ switch (Val) {
+ default:
+ return false;
+ case 0xF: // SY
+ case 0xE: // ST
+ case 0xB: // ISH
+ case 0xA: // ISHST
+ case 0x7: // NSH
+ case 0x6: // NSHST
+ case 0x3: // OSH
+ case 0x2: // OSHST
+ break;
+ }
+
+ Inst.addOperand(MCOperand::CreateImm(Val));
+ return true;
+}
+