[LLVMbugs] [Bug 9386] New: ARM disassembler failed to disassemble conditional bx

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=9386

           Summary: ARM disassembler failed to disassemble conditional bx
           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=6263)
 --> (http://llvm.org/bugs/attachment.cgi?id=6263)
add pred for BX

{{{

$ echo '0x15 0xff 0x2f 0x01' | Debug+Asserts/bin/llvm-mc -arch=arm
--disassemble -debug
Args: Debug+Asserts/bin/llvm-mc -arch=arm --disassemble -debug
Opcode=0 Name=PHI Format=(42)
 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
-------------------------------------------------------------------------------------------------
| 0: 0: 0: 0| 0: 0: 0: 1| 0: 0: 1: 0| 1: 1: 1: 1| 1: 1: 1: 1| 1: 1: 1: 1| 0: 0:
0: 1| 0: 1: 0: 1|
-------------------------------------------------------------------------------------------------

Unknown format
<stdin>:1:1: warning: invalid instruction encoding
0x15 0xff 0x2f 0x01
^

}}}

It should output "bxeq r5"

Attached patch fixes the problem

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