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    <head>
      <base href="http://llvm.org/bugs/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - Add support for ldr pseudo instruction in ARM integrated assembler"
   href="http://llvm.org/bugs/show_bug.cgi?id=17769">17769</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Add support for ldr pseudo instruction in ARM integrated assembler
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>tools
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>llc
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>dpeixott@codeaurora.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Both armasm and gnu as support an ldr pseudo instruction for loading constants
that lowers to either a mov, movn, or a pc-relative ldr from the constant pool.
For example, compiling this assembly with gnu as:

    .text
    foo:
      ldr r0, =0x1
      ldr r0, =-0x1
      ldr r0, =0x1000001
      ldr r0, =bar
      ldr r0, =baz
    bar:

Produces an object file like this (with relocations shown):
    Disassembly of section .text:
      00000000 <foo>:
         0:   e3a00001        mov     r0, #1
         4:   e3e00000        mvn     r0, #0
         8:   e59f0004        ldr     r0, [pc, #4]    ; 14 <bar>
         c:   e59f0004        ldr     r0, [pc, #4]    ; 18 <bar+0x4>
        10:   e59f0004        ldr     r0, [pc, #4]    ; 1c <bar+0x8>

      00000014 <bar>:
        14:   01000001        .word   0x01000001
        18:   00000014        .word   0x00000014
                              18: R_ARM_ABS32 .text
        1c:   00000000        .word   0x00000000
                              1c: R_ARM_ABS32 baz

Currently the llvm integrated assembler fails on this input with an error like:

    error: unexpected token in operand
      ldr r0, =0x1
              ^

After discussion on the llvm-dev list (see thread started here:
<a href="http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-October/066808.html">http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-October/066808.html</a>), the
community supports adding this feature to the integrated assembler.</pre>
        </div>
      </p>
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