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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - LDR_POST_IMM emits code as could not recognize"
href="http://llvm.org/bugs/show_bug.cgi?id=16357">16357</a>
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<th>Summary</th>
<td>LDR_POST_IMM emits code as could not recognize
</td>
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<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: ARM
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>manjian2006@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>LDR_POST_IMM emits texts like that:
ldr r2, [r5], #4
str r2, [r0], #4
subs r1, r1, #4
bne .LBB35_1
which couldn't be recognized by binutils' as.
And these code are generated by memcpy.
Is that normal?
And I tried to change its definition from:
def _POST_IMM : AI2ldstidx<0, isByte, 0, (outs GPR:$Rn_wb),
(ins GPR:$Rt, addr_offset_none:$addr, am2offset_imm:$offset),
IndexModePost, StFrm, iii,
opc, "\t$Rt, $addr, $offset",
"$addr.base = $Rn_wb", []> {
to:
def _POST_IMM : AI2ldstidx<0, isByte, 0, (outs GPR:$Rn_wb),
(ins GPR:$Rt, addr_offset_none:$addr, am2offset_imm:$offset),
IndexModePost, StFrm, iii,
opc, "\t$Rt, $addr!",
"$addr.base = $Rn_wb", []> {
and llvm seemed to generate the acceptable code:
ldr r2, [r5]!
str r2, [r0]!</pre>
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