[LLVMbugs] [Bug 9030] New: ARM disassembler failed to disassemble "mov pc, lr"

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=9030

           Summary: ARM disassembler failed to disassemble "mov pc, lr"
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: ARM
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: crabtw at gmail.com
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=6033)
 --> (http://llvm.org/bugs/attachment.cgi?id=6033)
Possible fix

Debug message

$ echo '0x0e 0xf0 0xa0 0xe1' | Debug+Asserts/bin/llvm-mc -arch=arm
--disassemble -debug
Args: Debug+Asserts/bin/llvm-mc -arch=arm --disassemble -debug
Opcode=179 Name=MOVPCLR Format=ARM_FORMAT_BRMISCFRM(3)
 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6 
5  4  3  2  1  0
-------------------------------------------------------------------------------------------------
| 1: 1: 1: 0| 0: 0: 0: 1| 1: 0: 1: 0| 0: 0: 0: 0| 1: 1: 1: 1| 0: 0: 0: 0| 0: 0:
0: 0| 1: 1: 1: 0|
-------------------------------------------------------------------------------------------------

<stdin>:1:1: warning: invalid instruction encoding
0x0e 0xf0 0xa0 0xe1
^

The attached patch could fix the problem.

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