<html>
<head>
<base href="http://llvm.org/bugs/" />
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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 --- - __builtin_readcyclecounter leads to ICE on ARMv6"
href="http://llvm.org/bugs/show_bug.cgi?id=17057">17057</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>__builtin_readcyclecounter leads to ICE on ARMv6
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</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>schnetter@gmail.com
</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>I am using clang 3.3:
clang version 3.3 (branches/release_33 188901) (llvm/branches/release_33
188900)
Target: armv6-unknown-linux-gnueabihf
Thread model: posix
I am building this program:
pi@water ~/src/c $ cat builtin_cyclecounter.c
unsigned long long f(void)
{
#if __has_builtin(__builtin_readcyclecounter)
return __builtin_readcyclecounter();
#else
# error "__builtin_readcyclecounter not available"
#endif
}
I am running on a Raspberry Pi:
pi@water ~/src/c $ uname -a
Linux water 3.6.11+ #474 PREEMPT Thu Jun 13 17:14:42 BST 2013 armv6l GNU/Linux
I receive this error:
pi@water ~/src/c $ clang -S builtin_cyclecounter.c
ExpandIntegerResult #0: 0x36cd948: i64,ch = ReadCycleCounter 0x36c05e4 [ORD=1]
[ID=0]
Do not know how to expand the result of this operator!
UNREACHABLE executed at
/home/pi/src/llvm-3.3/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp:1083!
Stack dump:
0. Program arguments: /home/pi/llvm-3.3/bin/clang -cc1 -triple
armv6-unknown-linux-gnueabihf -S -disable-free -main-file-name
builtin_cyclecounter.c -mrelocation-model static -mdisable-fp-elim -fmath-errno
-mconstructor-aliases -fuse-init-array -target-abi aapcs-linux -target-cpu
arm1136jf-s -mfloat-abi hard -target-linker-version 2.22 -coverage-file
/home/pi/src/c/builtin_cyclecounter.s -resource-dir
/home/pi/llvm-3.3/bin/../lib/clang/3.3 -internal-isystem /usr/local/include
-internal-isystem /home/pi/llvm-3.3/bin/../lib/clang/3.3/include
-internal-externc-isystem /usr/include/arm-linux-gnueabihf
-internal-externc-isystem /include -internal-externc-isystem /usr/include
-fno-dwarf-directory-asm -fdebug-compilation-dir /home/pi/src/c -ferror-limit
19 -fmessage-length 80 -mstackrealign -fno-signed-char -fobjc-runtime=gcc
-fobjc-default-synthesize-properties -fdiagnostics-show-option
-fcolor-diagnostics -backend-option -vectorize-loops -o builtin_cyclecounter.s
-x c builtin_cyclecounter.c
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module 'builtin_cyclecounter.c'.
4. Running pass 'ARM Instruction Selection' on function '@f'
clang: error: unable to execute command: Aborted
clang: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.3 (branches/release_33 188901) (llvm/branches/release_33
188900)
Target: armv6-unknown-linux-gnueabihf
Thread model: posix
clang: note: diagnostic msg: PLEASE submit a bug report to
<a href="http://llvm.org/bugs/">http://llvm.org/bugs/</a> and include the crash backtrace, preprocessed source, and
associated run script.
clang: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/builtin_cyclecounter-0fN6h0.c
clang: note: diagnostic msg: /tmp/builtin_cyclecounter-0fN6h0.sh
clang: note: diagnostic msg:
********************
The requested files to attach are:
pi@water ~/src/c $ cat /tmp/builtin_cyclecounter-0fN6h0.c
# 1 "builtin_cyclecounter.c" 1
unsigned long long f(void)
{
#if __has_builtin(__builtin_readcyclecounter)
return __builtin_readcyclecounter();
#else
# error "__builtin_readcyclecounter not available"
#endif
}
pi@water ~/src/c $ cat /tmp/builtin_cyclecounter-0fN6h0.sh
/home/pi/llvm-3.3/bin/clang -cc1 -triple armv6-unknown-linux-gnueabihf -S
-disable-free -main-file-name builtin_cyclecounter.c -mrelocation-model static
-mdisable-fp-elim -fmath-errno -mconstructor-aliases -fuse-init-array
-target-abi aapcs-linux -target-cpu arm1136jf-s -mfloat-abi hard
-target-linker-version 2.22 -fno-dwarf-directory-asm -ferror-limit 19
-fmessage-length 80 -mstackrealign -fno-signed-char -fobjc-runtime=gcc
-fobjc-default-synthesize-properties -fdiagnostics-show-option
-fcolor-diagnostics -backend-option -vectorize-loops -x c
builtin_cyclecounter-0fN6h0.c</pre>
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