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Possible memory corruption in GarbageCollect2Stack pass #4593

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DimitryAndric opened this issue Mar 12, 2024 · 6 comments
Closed

Possible memory corruption in GarbageCollect2Stack pass #4593

DimitryAndric opened this issue Mar 12, 2024 · 6 comments

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@DimitryAndric
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As part of an exp-run for the FreeBSD ports tree (see https://bugs.freebsd.org/276104) I am investigating a crash in the lang/ldc2 port. The port links against the LLVM 15.0.7 runtime, which is provided by another port, devel/llvm15. (I did not create the port, so I am unsure whether ldc supports linking against any later LLVM runtime.)

According to https://pkg-status.freebsd.org/gohan04/data/mainamd64PR276104-default-foo/2024-02-02_20h56m00s/logs/errors/ldc-1.35.0.log, the build is terminated by an assertion failure in malloc, apparently due to some memory corruption.

I lifted out the ldc command it is running, which is:

/wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2 -ldmd -c -linkonce-templates -wi -O -enable-inlining -Hkeep-all-bodies -release -of/wrkdirs/share/dim/ports/lang/ldc/work/ldc-1.35.0-src/obj/ldc-build-runtime.o /wrkdirs/share/dim/ports/lang/ldc/work/ldc-1.35.0-src/ldc-build-runtime.d

Running this through valgrind shows:

==29670== Memcheck, a memory error detector
==29670== Copyright (C) 2002-2022, and GNU GPL'd, by Julian Seward et al.
==29670== Using Valgrind-3.23.0.GIT and LibVEX; rerun with -h for copyright info
==29670== Command: /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2 -ldmd -c -linkonce-templates -wi -O -enable-inlining -Hkeep-all-bodies -release -of/wrkdirs/share/dim/ports/lang/ldc/work/ldc-1.35.0-src/obj/ldc-build-runtime.o /wrkdirs/share/dim/ports/lang/ldc/work/ldc-1.35.0-src/ldc-build-runtime.d
==29670== Parent PID: 29505
==29670== 
==29670== Conditional jump or move depends on uninitialised value(s)
==29670==    at 0x7B9595C: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF7375E: codegenModules(Array<Module*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xE287A1: mars_mainBody(Param&, Array<char const*>&, Array<char const*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  Uninitialised value was created by a stack allocation
==29670==    at 0xEDBE0D: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670== 
==29670== Use of uninitialised value of size 8
==29670==    at 0x7B95A47: llvm::SmallPtrSetImplBase::Grow(unsigned int) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0x7B95A11: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF7375E: codegenModules(Array<Module*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  Uninitialised value was created by a stack allocation
==29670==    at 0xEDBE0D: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670== 
==29670== Conditional jump or move depends on uninitialised value(s)
==29670==    at 0x484CEEC: malloc (vg_replace_malloc.c:448)
==29670==    by 0x7B95A5A: llvm::SmallPtrSetImplBase::Grow(unsigned int) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0x7B95A11: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  Uninitialised value was created by a stack allocation
==29670==    at 0xEDBE0D: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670== 
==29670== Conditional jump or move depends on uninitialised value(s)
==29670==    at 0x48567A0: memset (vg_replace_strmem.c:1392)
==29670==    by 0x7B95A93: llvm::SmallPtrSetImplBase::Grow(unsigned int) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0x7B95A11: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  Uninitialised value was created by a stack allocation
==29670==    at 0xEDBE0D: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670== 
==29670== Conditional jump or move depends on uninitialised value(s)
==29670==    at 0x48567A9: memset (vg_replace_strmem.c:1392)
==29670==    by 0x7B95A93: llvm::SmallPtrSetImplBase::Grow(unsigned int) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0x7B95A11: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  Uninitialised value was created by a stack allocation
==29670==    at 0xEDBE0D: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670== 
==29670== Conditional jump or move depends on uninitialised value(s)
==29670==    at 0x48567CD: memset (vg_replace_strmem.c:1392)
==29670==    by 0x7B95A93: llvm::SmallPtrSetImplBase::Grow(unsigned int) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0x7B95A11: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  Uninitialised value was created by a stack allocation
==29670==    at 0xEDBE0D: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670== 
==29670== Conditional jump or move depends on uninitialised value(s)
==29670==    at 0x485680B: memset (vg_replace_strmem.c:1392)
==29670==    by 0x7B95A93: llvm::SmallPtrSetImplBase::Grow(unsigned int) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0x7B95A11: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  Uninitialised value was created by a stack allocation
==29670==    at 0xEDBE0D: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670== 
==29670== Conditional jump or move depends on uninitialised value(s)
==29670==    at 0x4856814: memset (vg_replace_strmem.c:1392)
==29670==    by 0x7B95A93: llvm::SmallPtrSetImplBase::Grow(unsigned int) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0x7B95A11: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  Uninitialised value was created by a stack allocation
==29670==    at 0xEDBE0D: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670== 
==29670== Conditional jump or move depends on uninitialised value(s)
==29670==    at 0x4856890: memset (vg_replace_strmem.c:1392)
==29670==    by 0x7B95A93: llvm::SmallPtrSetImplBase::Grow(unsigned int) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0x7B95A11: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  Uninitialised value was created by a stack allocation
==29670==    at 0xEDBE0D: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670== 
==29670== Conditional jump or move depends on uninitialised value(s)
==29670==    at 0x7B95A97: llvm::SmallPtrSetImplBase::Grow(unsigned int) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0x7B95A11: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF7375E: codegenModules(Array<Module*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  Uninitialised value was created by a stack allocation
==29670==    at 0xEDBE0D: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670== 
==29670== Conditional jump or move depends on uninitialised value(s)
==29670==    at 0x7B95B33: llvm::SmallPtrSetImplBase::Grow(unsigned int) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0x7B95A11: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF7375E: codegenModules(Array<Module*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  Uninitialised value was created by a stack allocation
==29670==    at 0xEDBE0D: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670== 
==29670== Use of uninitialised value of size 8
==29670==    at 0x7B9598E: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF7375E: codegenModules(Array<Module*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xE287A1: mars_mainBody(Param&, Array<char const*>&, Array<char const*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  Uninitialised value was created by a stack allocation
==29670==    at 0xEDBE0D: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670== 
==29670== Use of uninitialised value of size 8
==29670==    at 0x7B959A2: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF7375E: codegenModules(Array<Module*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xE287A1: mars_mainBody(Param&, Array<char const*>&, Array<char const*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  Uninitialised value was created by a stack allocation
==29670==    at 0xEDBE0D: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670== 
==29670== Use of uninitialised value of size 8
==29670==    at 0x7B959B3: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF7375E: codegenModules(Array<Module*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xE287A1: mars_mainBody(Param&, Array<char const*>&, Array<char const*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  Uninitialised value was created by a stack allocation
==29670==    at 0xEDBE0D: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670== 
==29670== Conditional jump or move depends on uninitialised value(s)
==29670==    at 0x7B95AC4: llvm::SmallPtrSetImplBase::Grow(unsigned int) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0x7B95A11: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF7375E: codegenModules(Array<Module*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  Uninitialised value was created by a stack allocation
==29670==    at 0xEDBE0D: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670== 
==29670== Use of uninitialised value of size 8
==29670==    at 0x7B95AED: llvm::SmallPtrSetImplBase::Grow(unsigned int) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0x7B95A11: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF7375E: codegenModules(Array<Module*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  Uninitialised value was created by a stack allocation
==29670==    at 0xEDBE0D: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670== 
==29670== Use of uninitialised value of size 8
==29670==    at 0x7B95ABA: llvm::SmallPtrSetImplBase::Grow(unsigned int) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0x7B95A11: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF7375E: codegenModules(Array<Module*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  Uninitialised value was created by a stack allocation
==29670==    at 0xEDBE0D: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670== 
==29670== Conditional jump or move depends on uninitialised value(s)
==29670==    at 0x7B9596D: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF7375E: codegenModules(Array<Module*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xE287A1: mars_mainBody(Param&, Array<char const*>&, Array<char const*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  Uninitialised value was created by a stack allocation
==29670==    at 0xEDBE0D: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670== 
==29670== Invalid read of size 8
==29670==    at 0x7B9598E: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF7375E: codegenModules(Array<Module*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xE287A1: mars_mainBody(Param&, Array<char const*>&, Array<char const*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  Address 0x28923810 is not stack'd, malloc'd or (recently) free'd
==29670== 
==29670== warning: rfork() not implemented
==29670== 
==29670== Process terminating with default action of signal 11 (SIGSEGV): dumping core
==29670==  Access not within mapped region at address 0x28923810
==29670==    at 0x7B9598E: llvm::SmallPtrSetImplBase::insert_imp_big(void const*) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xEDCA07: isSafeToStackAllocate(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void>, false, false>, llvm::Value*, llvm::DominatorTree&, llvm::SmallVector<llvm::CallInst*, 4u>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xEDBD33: GarbageCollect2Stack::run(llvm::Function&, std::__1::function<llvm::DominatorTree& ()>, std::__1::function<llvm::CallGraph* ()>) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xED4E5B: llvm::detail::PassModel<llvm::Function, GarbageCollect2StackPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D914BE: llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED4D31: llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0x7D8C584: llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (in /usr/local/llvm15/lib/libLLVM-15.so)
==29670==    by 0xED1400: runOptimizationPasses(llvm::Module*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF77AA9: writeModule(llvm::Module*, char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF76353: ldc::CodeGenerator::writeAndFreeLLModule(char const*) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xF7375E: codegenModules(Array<Module*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==    by 0xE287A1: mars_mainBody(Param&, Array<char const*>&, Array<char const*>&) (in /wrkdirs/share/dim/ports/lang/ldc/work/ldc2-1.35.0-freebsd-x86_64/bin/ldc2)
==29670==  If you believe this happened as a result of a stack
==29670==  overflow in your program's main thread (unlikely but
==29670==  possible), you can try to increase the size of the
==29670==  main thread stack using the --main-stacksize= flag.
==29670==  The main thread stack size used in this run was 16777216.
==29670== 
==29670== HEAP SUMMARY:
==29670==     in use at exit: 209,690,700 bytes in 710,666 blocks
==29670==   total heap usage: 2,126,825 allocs, 1,416,159 frees, 912,178,087 bytes allocated
==29670== 
==29670== LEAK SUMMARY:
==29670==    definitely lost: 5,676,405 bytes in 118,118 blocks
==29670==    indirectly lost: 1,987,998 bytes in 52,211 blocks
==29670==      possibly lost: 19,586,696 bytes in 14,558 blocks
==29670==    still reachable: 182,439,601 bytes in 525,779 blocks
==29670==                       of which reachable via heuristic:
==29670==                         multipleinheritance: 20,970,656 bytes in 22 blocks
==29670==         suppressed: 0 bytes in 0 blocks
==29670== Rerun with --leak-check=full to see details of leaked memory
==29670== 
==29670== For lists of detected and suppressed errors, rerun with: -s
==29670== ERROR SUMMARY: 2621497 errors from 19 contexts (suppressed: 0 from 0)

So for reason, it's crashing in the GarbageCollect2Stack pass, while it is inserting values into the SmallSet Visited, in the function isSafeToStackAllocate(). At this point I a little out of clues, so I would appreciate any assistance in figuring out what goes wrong.

Note, if I use the same ldc command line, but append --disable-gc2stack, the compile completes successfully, as far as I can see.
@DimitryAndric
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ping @alonsobsd who is maintainer of the lang/ldc port.

@kinke
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kinke commented Mar 12, 2024 •
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Thx for the report. AFAICT, the relevant code (in master, but shouldn't have changed significantly since v1.35) looks as harmless as it gets wrt. inserting some pointers into a stack-allocated and default-initialized llvm::SmallSet<llvm::Use *, 16> Visited. We have been using v15.0.7 as primary LLVM version for a while (incl. extensive CI coverage), but I've never seen any issues when building the little ldc-build-runtime tool.

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kinke commented Mar 12, 2024

Oh and our current FreeBSD CI does use the LLVM v15.0.7 port too, and its clang as C++ host compiler: https://cirrus-ci.com/task/5161765764333568

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Yeah, the mystery here is that the devel/llvm15 port, when compiled by clang 17.0.6, does seem to work, whereas if the devel/llvm15 port is compiled by clang 18, it does not.... I just built a ldc2 binary with debug info on a FreeBSD 15-CURRENT machine with clang 17.0.6 and copied it over the the FreeBSD machine with a clang-18 compiled libLLVM15.so, and for some reason it is now allocating ~25 GiB of data in the "SmallPtrSet". :)

I'm thinking that some sort of optimization has messed up the assumptions under which such SmallPtrSets can be used, but I can't see the problem with other ports that use llvm15, so I'm still not sure whether the problem is in GarbageCollect2Stack, in llvm15, or in clang18...

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kinke commented Mar 12, 2024

Oh wild. I'd make sure that the same clang that was used to compile libLLVM is used as C++ host compiler for LDC too.

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Okay, this turned out to be my own fault. In llvm/llvm-project@6255157d24e2 I turned on trivial std::pair copy constructors for FreeBSD >= 14. Which was a bad idea, in hindsight, because the ABI changes. The idea at the time was to bump the libc++ version to be able to break the ABI, but we never got to that.

Long story short, because of the mismatch a libLLVMnn.so compiled against a "new ABI" libc++ tends to crash in interesting ways, when you use it from a precompiled ldc2 executable, that was originally compiled against the "old ABI" libc++.

In DimitryAndric/freebsd-src@4c0e8f6 I reverted that, rebuilt the FreeBSD world and ports, and now lang/ldc builds just fine, at least without any crashes! I haven't extensively tested the resulting ldmd2 and ldc2, but if they are able to build the D runtime, I assume they are OK.

@DimitryAndric DimitryAndric closed this as not planned Won't fix, can't repro, duplicate, stale Mar 20, 2024
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