void ARMInstPrinter::printPredicateOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
ARMCC::CondCodes CC = (ARMCC::CondCodes)MI->getOperand(OpNum).getImm();
- if (CC != ARMCC::AL)
+ // Handle the undefined 15 CC value here for printing so we don't abort().
+ if ((unsigned)CC == 15)
+ O << "<und>";
+ else if (CC != ARMCC::AL)
O << ARMCondCodeToString(CC);
}
--- /dev/null
+# RUN: llvm-mc --disassemble %s -triple=thumbv7-unknown-unknown |& grep und
+# rdar://10841671
+
+0xe3 0xbf
+0xdf 0xed 0x61 0x3b
+0x71 0xee 0xe0 0x1b
+0x72 0xee 0xa3 0x2b
+0xdf 0xed 0x60 0x0b
+
+# This is test is dealing with a undefined condition code value of 15 in the
+# above sequence of junk bytes and not allowing the disassembler to abort on
+# printing the final instruction in this list.
+#
+# ittte al
+# vldr d19, [pc, #388]
+# vsub.f64 d17, d17, d16
+# vadd.f64 d18, d18, d19
+# vldr<und> d16, [pc, #384]