https://llvm.org/bugs/show_bug.cgi?id=25035
Bug ID: 25035
Summary: [Polly] Crash after "Allow loops with multiple back
edges"
Product: Projects
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Polly
Assignee: polly-...@googlegroups.com
Reporter: tob...@grosser.es
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Created attachment 14992
--> https://llvm.org/bugs/attachment.cgi?id=14992&action=edit
Test case to reproduce the bug
Hi,
Polly crashes after commit:
Author: Johannes Doerfert <doerf...@cs.uni-saarland.de>
Date: Sun Sep 20 15:00:20 2015 +0000
Allow loops with multiple back edges
In order to allow multiple back edges we:
- compute the conditions under which each back edge is taken
- build the union over all these conditions, thus the condition that
any back edge is taken
- apply the same logic to the union we applied to a single back edge
git-svn-id: https://llvm.org/svn/llvm-project/polly/trunk@248120
with the following error:
/home/grosser/Projects/polly/git/tools/polly/lib/External/isl/isl_space.c:1620:
index out of bounds
0 opt 0x00000000021bb3ae
llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 46
1 opt 0x00000000021bc4e9
2 opt 0x00000000021baf23 llvm::sys::RunSignalHandlers() + 131
3 opt 0x00000000021bc744
4 libpthread.so.0 0x00007f78eb99dd10
5 libc.so.6 0x00007f78eabb0267 gsignal + 55
6 libc.so.6 0x00007f78eabb1eca abort + 362
7 LLVMPolly.so 0x00007f78ea83f465
8 LLVMPolly.so 0x00007f78ea6bbaae
9 LLVMPolly.so 0x00007f78ea63ccc1
10 LLVMPolly.so 0x00007f78ea63cda7
11 LLVMPolly.so 0x00007f78ea7483b3
polly::Scop::buildDomainsWithBranchConstraints(llvm::Region*, llvm::LoopInfo&,
polly::ScopDetection&, llvm::DominatorTree&) + 1603
12 LLVMPolly.so 0x00007f78ea747c45 polly::Scop::buildDomains(llvm::Region*,
llvm::LoopInfo&, polly::ScopDetection&, llvm::DominatorTree&) + 309
13 LLVMPolly.so 0x00007f78ea74b3d4 polly::Scop::init(llvm::LoopInfo&,
polly::ScopDetection&, llvm::AAResults&) + 68
14 LLVMPolly.so 0x00007f78ea74f906 polly::ScopInfo::buildScop(llvm::Region&,
llvm::DominatorTree&) + 230
15 LLVMPolly.so 0x00007f78ea74ff24
polly::ScopInfo::runOnRegion(llvm::Region*, llvm::RGPassManager&) + 308
16 opt 0x00000000015e646e
llvm::RGPassManager::runOnFunction(llvm::Function&) + 1102
17 opt 0x0000000001c5dd9f
llvm::FPPassManager::runOnFunction(llvm::Function&) + 399
18 opt 0x0000000001c5e0b5
llvm::FPPassManager::runOnModule(llvm::Module&) + 117
19 opt 0x0000000001c5e84a
20 opt 0x0000000001c5e376
llvm::legacy::PassManagerImpl::run(llvm::Module&) + 342
21 opt 0x0000000001c5ed61
llvm::legacy::PassManager::run(llvm::Module&) + 33
When run with 'polly-opt /tmp/bug.ll -polly-scops' on bug.ll
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