[LLVMbugs] [Bug 7747] New: llvm-mc: ARMDisassemblerCore.cpp:2439: bool DisassembleN1RegModImmFrm(llvm::MCInst&, unsigned int, uint32_t, short unsigned int, unsigned int&, llvm::ARMBasicMCBuilder*): Assertion `0 && "Unreachable code!"' failed.

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=7747

           Summary: llvm-mc: ARMDisassemblerCore.cpp:2439: bool
                    DisassembleN1RegModImmFrm(llvm::MCInst&, unsigned int,
                    uint32_t, short unsigned int, unsigned int&,
                    llvm::ARMBasicMCBuilder*): Assertion `0 &&
                    "Unreachable code!"' failed.
           Product: new-bugs
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: sliedes at cc.hut.fi
                CC: llvmbugs at cs.uiuc.edu


(this is trunk revision 109745)

Hi,

This is the final one of three (3/3) assertion failures encountered while
testing llvm-mc on all 4-byte ARM asm sequences.

------------------------------------------------------------
$ echo '0x30 0x00 0x80 0xf2' |Debug+Asserts/bin/llvm-mc --disassemble
--triple=arm
llvm-mc: ARMDisassemblerCore.cpp:2439: bool
DisassembleN1RegModImmFrm(llvm::MCInst&, unsigned int, uint32_t, short unsigned
int, unsigned int&, llvm::ARMBasicMCBuilder*): Assertion `0 && "Unreachable
code!"' failed.
0  llvm-mc         0x0000000000d75854
1  llvm-mc         0x0000000000d75718
2  libpthread.so.0 0x00007ffcb3c7df60
3  libc.so.6       0x00007ffcb2f90175 gsignal + 53
4  libc.so.6       0x00007ffcb2f92f80 abort + 384
5  libc.so.6       0x00007ffcb2f892b1 __assert_fail + 241
6  llvm-mc         0x0000000000569c03
7  llvm-mc         0x000000000056bc05
8  llvm-mc         0x000000000056c8dd
9  llvm-mc         0x0000000000559cca
10 llvm-mc         0x0000000000407287
11 llvm-mc         0x0000000000407b02
12 llvm-mc         0x000000000040bc11
13 llvm-mc         0x000000000040bce9 main + 193
14 libc.so.6       0x00007ffcb2f7cc4d __libc_start_main + 253
15 llvm-mc         0x0000000000406fe9
Stack dump:
0.      Program arguments: Debug+Asserts/bin/llvm-mc --disassemble --triple=arm 
Aborted
------------------------------------------------------------

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