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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Clang hangs compiling ARM inline assembly, with instruction on unsupported target"
href="https://bugs.llvm.org/show_bug.cgi?id=32654">32654</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Clang hangs compiling ARM inline assembly, with instruction on unsupported target
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</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>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>kongy.dev@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>$ cat test.cc
float sqrtf(float x) {
__asm__("vsqrt.f32 %0, %1"
: "=t"(x)
: "t"(x));
return x;
}
$ ~/llvm/build/bin/clang --target=armv5-linux-gnueabi test.c -S -o -
.text
.syntax unified
.eabi_attribute 67, "2.09" @ Tag_conformance
.cpu arm10tdmi
.eabi_attribute 6, 3 @ Tag_CPU_arch
.eabi_attribute 8, 1 @ Tag_ARM_ISA_use
.eabi_attribute 17, 1 @ Tag_ABI_PCS_GOT_use
.eabi_attribute 20, 1 @ Tag_ABI_FP_denormal
.eabi_attribute 21, 1 @ Tag_ABI_FP_exceptions
.eabi_attribute 23, 3 @ Tag_ABI_FP_number_model
.eabi_attribute 34, 0 @ Tag_CPU_unaligned_access
.eabi_attribute 24, 1 @ Tag_ABI_align_needed
.eabi_attribute 25, 1 @ Tag_ABI_align_preserved
.eabi_attribute 38, 1 @ Tag_ABI_FP_16bit_format
.eabi_attribute 18, 4 @ Tag_ABI_PCS_wchar_t
.eabi_attribute 26, 2 @ Tag_ABI_enum_size
.eabi_attribute 14, 0 @ Tag_ABI_PCS_R9_use
.file "test3.c"
clang-5.0:
/usr/local/google/home/yikong/llvm/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp:392:
void getCopyToParts(llvm::SelectionDAG &, const llvm::SDLoc &, llvm::SDValue,
llvm::SDValue *, unsigned int, llvm::MVT, const llvm::Value *, ISD::NodeType):
Assertion `DAG.getTargetLoweringInfo().isTypeLegal(PartVT) && "Copying to an
illegal type!"' failed.
(hangs)
vsqrt instruction does not exist for armv5, this should throw an error instead
of compiler internal assertion failure and hanging.</pre>
</div>
</p>
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