[LLVMbugs] [Bug 12731] New: llvm-objdump -arch does not accept x86 and x86-64 as valid arch names

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=12731

             Bug #: 12731
           Summary: llvm-objdump -arch does not accept x86 and x86-64 as
                    valid arch names
           Product: new-bugs
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: meadori at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


While investigating PR12729 I noticed that 'x86' and 'x86-64' are *not*
accepted as valid architecture names:


$ llvm-objdump -arch=x86 -disassemble test.o

test.o:    file format Mach-O 64-bit x86-64

Disassembly of section __TEXT,__text:error: no assembly info for target
x86-unknown-unknown
$ llvm-objdump -arch=x86-64 -disassemble test.o

test.o:    file format Mach-O 64-bit x86-64

Disassembly of section __TEXT,__text:error: no assembly info for target
x86-64-unknown-unknown


This is due to the logic in 'llvm-objdump.cpp:GetTarget'.  I think the logic
should be change to match how 'llc' and 'llvm-mc' do it (by looking up the
architecture type from the LLVM name).

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