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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 --- - Assertion failed: (TheLoop->getLoopPreheader() && "No preheader!!"), function canVectorize, file LoopVectorize.cpp, line 2431."
href="http://llvm.org/bugs/show_bug.cgi?id=16139">16139</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Assertion failed: (TheLoop->getLoopPreheader() && "No preheader!!"), function canVectorize, file LoopVectorize.cpp, line 2431.
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</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>Loop Optimizer
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>rdivacky@freebsd.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>liska delta-2006.08.03$ cat beak_emu.c
typedef unsigned long Eterm;
typedef unsigned long Uint;
typedef Uint UWord;
typedef UWord BeamInstr;
void** beam_ops;
void process_main(void) {
register BeamInstr *I = ((void *)0);
register Eterm tmp_arg2 = ((~((Uint) 0) << 6) |
((0x3 << 4) | ((0x2 << 2) | 0x3)));
static void* opcodes[] = {
&&lb_i_bsr_jId, &&lb_i_bxor_jId, &&lb_i_call_f,
};
lb_move_return_nr: {
goto *((void *)*I);
}
lb_i_call_f: {
Eterm fast_element_tuple;
do_fast_element: if
(((!(((((fast_element_tuple)))) & (0x3 -0x2))) && (((*((Eterm*)
(((((fast_element_tuple))) - 0x2)))) & 0x3F) == (0x0|(0x0 << 2))))) {
}
goto do_fast_element;
}
lb_i_bxor_jId: {
lb_i_bsr_jId: if ((((tmp_arg2) & 0xF) == ((0x3
<< 2) | 0x3))) {
}
{
beam_ops = opcodes;
}
}
}
liska delta-2006.08.03$ /usr/local/bin/clang -O3 beak_emu.c
Assertion failed: (TheLoop->getLoopPreheader() && "No preheader!!"), function
canVectorize, file LoopVectorize.cpp, line 2431.
Stack dump:
0. Program arguments: /usr/local/bin/clang -cc1 -triple
x86_64-unknown-freebsd9.1 -emit-obj -disable-free -main-file-name beak_emu.c
-mrelocation-model static -mdisable-fp-elim -masm-verbose -mconstructor-aliases
-munwind-tables -target-cpu x86-64 -target-linker-version 2.17.50 -resource-dir
/usr/local/bin/../lib/clang/3.4 -O3 -fdebug-compilation-dir
/tmp/delta-2006.08.03 -ferror-limit 19 -fmessage-length 115 -mstackrealign
-fobjc-runtime=gnustep -fobjc-default-synthesize-properties
-fdiagnostics-show-option -fcolor-diagnostics -backend-option -vectorize-loops
-o /tmp/beak_emu-1BKSqC.o -x c beak_emu.c
1. <eof> parser at end of file
2. Per-module optimization passes
3. Running pass 'CallGraph Pass Manager' on module 'beak_emu.c'.
4. Running pass 'Loop Pass Manager' on function '@process_main'
5. Running pass 'Loop Vectorization' on basic block '%do_fast_element'</pre>
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