[llvm-bugs] [Bug 25240] New: [Polly] isl_ctx not freed: memory leak in new domain construction

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https://llvm.org/bugs/show_bug.cgi?id=25240

            Bug ID: 25240
           Summary: [Polly] isl_ctx not freed: memory leak in new domain
                    construction
           Product: Projects
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Polly
          Assignee: polly-dev at googlegroups.com
          Reporter: tobias at grosser.es
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 15100
  --> https://llvm.org/bugs/attachment.cgi?id=15100&action=edit
Test case

With r250655 I get the following error when calling 'polly-opt -polly-scops':

/home/grosser/Projects/polly/git/tools/polly/lib/External/isl/isl_ctx.c:245:
isl_ctx freed, but some objects still reference it

The relevant valgrind trace is:


==7281==    at 0x4C2DC90: calloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==7281==    by 0x1826AF25: isl_calloc_or_die (isl_ctx.c:67)
==7281==    by 0x182EA272: isl_schedule_from_schedule_tree (isl_schedule.c:51)
==7281==    by 0x182EA332: isl_schedule_from_domain (isl_schedule.c:79)
==7281==    by 0x18159DBE: polly::Scop::buildSchedule(llvm::Region*,
llvm::DenseMap<llvm::Loop*, std::pair<isl_schedule*, unsigned int>,
llvm::DenseMapInfo<llvm::Loop*>, llvm::detail::DenseMapPair<llvm::Loop*,
std::pair<isl_schedule*, unsigned int> > >&) (ScopInfo.cpp:3080)
==7281==    by 0x181596F7: polly::Scop::init(llvm::AAResults&)
(ScopInfo.cpp:2379)
==7281==    by 0x1815F4DE: polly::ScopInfo::buildScop(llvm::Region&,
llvm::DominatorTree&) (ScopInfo.cpp:3549)
==7281==    by 0x1815FA6D: polly::ScopInfo::runOnRegion(llvm::Region*,
llvm::RGPassManager&) (ScopInfo.cpp:3603)
==7281==    by 0x102BCABD: llvm::RGPassManager::runOnFunction(llvm::Function&)
(RegionPass.cpp:99)
==7281==    by 0x11729C6E: llvm::FPPassManager::runOnFunction(llvm::Function&)
(LegacyPassManager.cpp:1521)
==7281==    by 0x11729F84: llvm::FPPassManager::runOnModule(llvm::Module&)
(LegacyPassManager.cpp:1542)
==7281==    by 0x1172A719: (anonymous
namespace)::MPPassManager::runOnModule(llvm::Module&)
(LegacyPassManager.cpp:1598)
==7281==    by 0x1172A245: llvm::legacy::PassManagerImpl::run(llvm::Module&)
(LegacyPassManager.cpp:1701)
==7281==    by 0x1172AC30: llvm::legacy::PassManager::run(llvm::Module&)
(LegacyPassManager.cpp:1732)
==7281==    by 0x44B6DF: main (opt.cpp:599)

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