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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - indvars crashes: Assertion `isAvailableAtLoopEntry(LHS, L) && "LHS is not available at Loop Entry"' failed."
href="https://bugs.llvm.org/show_bug.cgi?id=43477">43477</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>indvars crashes: Assertion `isAvailableAtLoopEntry(LHS, L) && "LHS is not available at Loop Entry"' failed.
</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>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>cszide@163.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=22587" name="attach_22587" title="parse-datetime.bc">attachment 22587</a> <a href="attachment.cgi?id=22587&action=edit" title="parse-datetime.bc">[details]</a></span>
parse-datetime.bc
The test program is extracted from tar-1.30.
$clang -v
clang version 10.0.0 (trunk 372974)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.4.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.4.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$opt -globalopt -gvn -instcombine -sccp -inline -mem2reg -jump-threading
-loop-unroll-and-jam -gvn -nary-reassociate -indvars parse-datetime.bc
WARNING: You're attempting to print out a bitcode file.
This is inadvisable as it may cause display problems. If
you REALLY want to taste LLVM bitcode first-hand, you
can force output with the `-f' option.
opt:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/lib/Analysis/ScalarEvolution.cpp:9555:
bool llvm::ScalarEvolution::isLoopEntryGuardedByCond(const llvm::Loop*,
llvm::CmpInst::Predicate, const llvm::SCEV*, const llvm::SCEV*): Assertion
`isAvailableAtLoopEntry(LHS, L) && "LHS is not available at Loop Entry"'
failed.
Stack dump:
0. Program arguments:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt -globalopt -gvn
-instcombine -sccp -inline -mem2reg -jump-threading -loop-unroll-and-jam -gvn
-nary-reassociate -indvars parse-datetime.bc
1. Running pass 'CallGraph Pass Manager' on module 'parse-datetime.bc'.
2. Running pass 'Loop Pass Manager' on function '@yyparse'
3. Running pass 'Induction Variable Simplification' on basic block '%1699'
#0 0x000055943e3a4baa llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x2783baa)
#1 0x000055943e3a2884 llvm::sys::RunSignalHandlers()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x2781884)
#2 0x000055943e3a29c2 SignalHandler(int)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x27819c2)
#3 0x00007f304cbbe890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#4 0x00007f304b870e97 raise
/build/glibc-OTsEL5/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
#5 0x00007f304b872801 abort /build/glibc-OTsEL5/glibc-2.27/stdlib/abort.c:81:0
#6 0x00007f304b86239a __assert_fail_base
/build/glibc-OTsEL5/glibc-2.27/assert/assert.c:89:0
#7 0x00007f304b862412 (/lib/x86_64-linux-gnu/libc.so.6+0x30412)
#8 0x000055943d742c31
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x1b21c31)
#9 0x000055943e1452d0 (anonymous namespace)::IndVarSimplify::run(llvm::Loop*)
(.part.476)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x25242d0)
#10 0x000055943e146610 (anonymous
namespace)::IndVarSimplifyLegacyPass::runOnLoop(llvm::Loop*,
llvm::LPPassManager&) (.part.477)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x2525610)
#11 0x000055943d67562b llvm::LPPassManager::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x1a5462b)
#12 0x000055943dce3209 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x20c2209)
#13 0x000055943d5ab1ba (anonymous
namespace)::CGPassManager::runOnModule(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x198a1ba)
#14 0x000055943dce2461 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x20c1461)
#15 0x000055943c4b2b4f main
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x891b4f)
#16 0x00007f304b853b97 __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
#17 0x000055943c52ac7a _start
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x909c7a)
Aborted (core dumped)
The optimization sequence can be reduced to "-nary-reassociate -indvars" using
bugpoint.
$opt bugpoint-reduced-simplified.bc -nary-reassociate -indvars
WARNING: You're attempting to print out a bitcode file.
This is inadvisable as it may cause display problems. If
you REALLY want to taste LLVM bitcode first-hand, you
can force output with the `-f' option.
opt:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/lib/Analysis/ScalarEvolution.cpp:9555:
bool llvm::ScalarEvolution::isLoopEntryGuardedByCond(const llvm::Loop*,
llvm::CmpInst::Predicate, const llvm::SCEV*, const llvm::SCEV*): Assertion
`isAvailableAtLoopEntry(LHS, L) && "LHS is not available at Loop Entry"'
failed.
Stack dump:
0. Program arguments:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt
bugpoint-reduced-simplified.bc -nary-reassociate -indvars
1. Running pass 'Function Pass Manager' on module
'bugpoint-reduced-simplified.bc'.
2. Running pass 'Loop Pass Manager' on function '@yyparse'
3. Running pass 'Induction Variable Simplification' on basic block '%354'
#0 0x000055a70b45bbaa llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x2783baa)
#1 0x000055a70b459884 llvm::sys::RunSignalHandlers()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x2781884)
#2 0x000055a70b4599c2 SignalHandler(int)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x27819c2)
#3 0x00007f01ebdb5890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#4 0x00007f01eaa67e97 raise
/build/glibc-OTsEL5/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
#5 0x00007f01eaa69801 abort /build/glibc-OTsEL5/glibc-2.27/stdlib/abort.c:81:0
#6 0x00007f01eaa5939a __assert_fail_base
/build/glibc-OTsEL5/glibc-2.27/assert/assert.c:89:0
#7 0x00007f01eaa59412 (/lib/x86_64-linux-gnu/libc.so.6+0x30412)
#8 0x000055a70a7f9c31
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x1b21c31)
#9 0x000055a70b1fc2d0 (anonymous namespace)::IndVarSimplify::run(llvm::Loop*)
(.part.476)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x25242d0)
#10 0x000055a70b1fd610 (anonymous
namespace)::IndVarSimplifyLegacyPass::runOnLoop(llvm::Loop*,
llvm::LPPassManager&) (.part.477)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x2525610)
#11 0x000055a70a72c62b llvm::LPPassManager::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x1a5462b)
#12 0x000055a70ad9a209 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x20c2209)
#13 0x000055a70ad9a301 llvm::FPPassManager::runOnModule(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x20c2301)
#14 0x000055a70ad99461 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x20c1461)
#15 0x000055a709569b4f main
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x891b4f)
#16 0x00007f01eaa4ab97 __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
#17 0x000055a7095e1c7a _start
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x909c7a)
Aborted (core dumped)</pre>
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