LLVM Bugzilla is read-only and represents the historical archive of all LLVM issues filled before November 26, 2021. Use github to submit LLVM bugs

Bug 1431 - segfault with -sccp
Summary: segfault with -sccp
Status: RESOLVED FIXED
Alias: None
Product: new-bugs
Classification: Unclassified
Component: new bugs (show other bugs)
Version: unspecified
Hardware: Other Linux
: P normal
Assignee: Unassigned LLVM Bugs
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2007-05-17 05:03 PDT by Duncan Sands
Modified: 2010-02-22 12:53 PST (History)
3 users (show)

See Also:
Fixed By Commit(s):

Attachments
testcase .ll (1.77 KB, text/plain)
2007-05-17 05:04 PDT, Duncan Sands 		Details
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Duncan Sands 2007-05-17 05:03:33 PDT 
$ opt -sccp tc.bc

opt((anonymous namespace)::PrintStackTrace()+0x1a)[0x8650486]
opt((anonymous namespace)::SignalHandler(int)+0x112)[0x865074c]
[0xffffe420]
opt(llvm::DominatorTree::DFSPass(llvm::BasicBlock*, 
llvm::DominatorTreeBase::InfoRec&, unsigned int)+0xf5)[0x85b0fdf]
opt(llvm::DominatorTree::calculate(llvm::Function&)+0x108)[0x85b11c6]
opt(llvm::DominatorTree::runOnFunction(llvm::Function&)+0x46)[0x85b1692]
opt(llvm::FPPassManager::runOnFunction(llvm::Function&)+0x13a)[0x85eb2bc]
opt(llvm::FPPassManager::runOnModule(llvm::Module&)+0x6e)[0x85eb484]
opt(llvm::MPPassManager::runOnModule(llvm::Module&)+0x11d)[0x85eaf5d]
opt(llvm::PassManagerImpl::run(llvm::Module&)+0x6e)[0x85eb12a]
opt(llvm::PassManager::run(llvm::Module&)+0x1a)[0x85eb17c]
opt(main+0xa10)[0x8388296]
/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xdc)[0xb7cc0ebc]
opt(realloc+0x7d)[0x837a4c1]
Segmentation fault (core dumped)
Comment 1 Duncan Sands 2007-05-17 05:04:21 PDT 
Created attachment 855 [details]
testcase .ll
Comment 2 Anton Korobeynikov 2007-05-17 05:10:40 PDT 
Valgrinding:

==15305==  Access not within mapped region at address 0x0
==15305==    at 0x836F795: llvm::TerminatorInst::getNumSuccessors() const
(InstrTypes.h:56)
==15305==    by 0x8579393: llvm::DominatorTree::DFSPass(llvm::BasicBlock*,
llvm::DominatorTreeBase::InfoRec&, unsigned) (Dominators.cpp:106)
==15305==    by 0x8579788: llvm::DominatorTree::calculate(llvm::Function&)
(Dominators.cpp:244)
==15305==    by 0x857A0A3: llvm::DominatorTree::runOnFunction(llvm::Function&)
(Dominators.cpp:369)
==15305==    by 0x85AE9C1: llvm::FPPassManager::runOnFunction(llvm::Function&)
(PassManager.cpp:1145)
==15305==    by 0x85AEB71: llvm::FPPassManager::runOnModule(llvm::Module&)
(PassManager.cpp:1164)
==15305==    by 0x85AECE1: llvm::MPPassManager::runOnModule(llvm::Module&)
(PassManager.cpp:1213)
==15305==    by 0x85AF0CD: llvm::PassManagerImpl::run(llvm::Module&)
(PassManager.cpp:1286)
==15305==    by 0x85AF239: llvm::PassManager::run(llvm::Module&)
(PassManager.cpp:1318)
==15305==    by 0x8377A85: main (opt.cpp:366)
Comment 3 Anton Korobeynikov 2007-05-17 05:12:58 PDT 
Segfault is caused by first invoke.