https://bugs.llvm.org/show_bug.cgi?id=46638
Bug ID: 46638
Summary: Crash in isValidAssumeForContext after
lvmorg-11-init-19807-gcf1d9f9f49a
Product: new-bugs
Version: unspecified
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: dma...@mozilla.com
CC: htmldevelo...@gmail.com, llvm-bugs@lists.llvm.org,
nikita....@gmail.com
Unfortunately the steps to reproduce are roughly "build Firefox with PGO and
LTO enabled for both C++ and Rust" which is an arduous process. Here's hoping
that maybe the bug can be found by inspection alone.
After
https://github.com/llvm/llvm-project/commit/cf1d9f9f49ae62ab4c7bb685d786a8daa7bc1d4a,
the following crash is seen:
> 0. Running pass 'Function Pass Manager' on module
> '/home/vm/src/mc/obj-llvmorg-11-init-19841-g7356b4243ad/x86_64-unknown-linux-gnu/release/libgkrust_gtest.a(wgpu_bindings-00b8588e9f85c3f5.wgpu_bindings.cqanh8rg-cgu.0.rcgu.o
> at 12913238)'.
> 1. Running pass 'Simplify the CFG' on function
> '@wgpu_server_device_create_bind_group_layout'
> #0 0x00007f1e117e568a llvm::sys::PrintStackTrace(llvm::raw_ostream&)
> (/home/vm/src/llvmorg-11-init-19807-gcf1d9f9f49a/bin/../lib/libLLVM-11git.so+0x14df68a)
> #1 0x00007f1e117e5964 SignalHandler(int)
> (/home/vm/src/llvmorg-11-init-19807-gcf1d9f9f49a/bin/../lib/libLLVM-11git.so+0x14df964)
> #2 0x00007f1e12e113c0 __restore_rt
> (/lib/x86_64-linux-gnu/libpthread.so.0+0x153c0)
> #3 0x00007f1e1181c036 llvm::BasicBlock::getSinglePredecessor() const
> (/home/vm/src/llvmorg-11-init-19807-gcf1d9f9f49a/bin/../lib/libLLVM-11git.so+0x1516036)
> #4 0x00007f1e12315d49 llvm::isValidAssumeForContext(llvm::Instruction
> const*, llvm::Instruction const*, llvm::DominatorTree const*)
> (/home/vm/src/llvmorg-11-init-19807-gcf1d9f9f49a/bin/../lib/libLLVM-11git.so+0x200fd49)
> #5 0x00007f1e12251dfc SimplifyICmpInst(unsigned int, llvm::Value*,
> llvm::Value*, llvm::SimplifyQuery const&, unsigned int)
> (/home/vm/src/llvmorg-11-init-19807-gcf1d9f9f49a/bin/../lib/libLLVM-11git.so+0x1f4bdfc)
> #6 0x00007f1e122564b8 llvm::SimplifyInstruction(llvm::Instruction*,
> llvm::SimplifyQuery const&, llvm::OptimizationRemarkEmitter*)
> (/home/vm/src/llvmorg-11-init-19807-gcf1d9f9f49a/bin/../lib/libLLVM-11git.so+0x1f504b8)
> #7 0x00007f1e11e5b8e6 FoldCondBranchOnPHI(llvm::BranchInst*,
> llvm::DataLayout const&, llvm::AssumptionCache*)
> (/home/vm/src/llvmorg-11-init-19807-gcf1d9f9f49a/bin/../lib/libLLVM-11git.so+0x1b558e6)
> #8 0x00007f1e11e5753d (anonymous
> namespace)::SimplifyCFGOpt::simplifyCondBranch(llvm::BranchInst*,
> llvm::IRBuilder<llvm::ConstantFolder, llvm::IRBuilderDefaultInserter>&)
> (/home/vm/src/llvmorg-11-init-19807-gcf1d9f9f49a/bin/../lib/libLLVM-11git.so+0x1b5153d)
> #9 0x00007f1e11e4dbca (anonymous
> namespace)::SimplifyCFGOpt::simplifyOnce(llvm::BasicBlock*)
> (/home/vm/src/llvmorg-11-init-19807-gcf1d9f9f49a/bin/../lib/libLLVM-11git.so+0x1b47bca)
> #10 0x00007f1e11e4c9b5 llvm::simplifyCFG(llvm::BasicBlock*,
> llvm::TargetTransformInfo const&, llvm::SimplifyCFGOptions const&,
> llvm::SmallPtrSetImpl<llvm::BasicBlock*>*)
> (/home/vm/src/llvmorg-11-init-19807-gcf1d9f9f49a/bin/../lib/libLLVM-11git.so+0x1b469b5)
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