llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10353: bool llvm::LoopVectorizePass::processLoop(llvm::Loop*): Assertion `VF.Width == Width && "VPlan cost model and legacy cost model disagreed"' failed.

[dcb314]

calcc-0ebd65.c.gz
calcc-0ebd65.sh.gz

Stack backtrace is

#11 0x0000000003adfddd llvm::LoopVectorizePass::processLoop(llvm::Loop*) /home/dcb40b/llvm/trunk/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10353:9
#12 0x0000000003ae347f llvm::LoopVectorizePass::runImpl(llvm::Function&, llvm::ScalarEvolution&, llvm::LoopInfo&, llvm::TargetTransformInfo&, llvm::DominatorTree&, llvm::BlockFrequencyInfo*, llvm::TargetLibraryInfo*, llvm::DemandedBits&, llvm::AssumptionCache&, llvm::LoopAccessInfoManager&, llvm::OptimizationRemarkEmitter&, llvm::ProfileSummaryInfo*) /home/dcb40b/llvm/trunk/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10446:27
#13 0x0000000003ae4382 llvm::LoopVectorizePass::run(llvm::Function&, llvm::AnalysisManagerllvm::Function&) /home/dcb40b/llvm/trunk/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10486:5
#14 0x00000000034fbd6d llvm::detail::PassModel<llvm::Function, llvm::LoopVectorizePass, llvm::AnalysisManagerllvm::Function>::run(llvm::Function&, llvm::AnalysisManagerllvm::Function&) /home/dcb40b/llvm/trunk/llvm/include/llvm/IR/PassManagerInternal.h:91:3
#15 0x0000000001ae5b21 llvm::PassManager<llvm::Function, llvm::AnalysisManagerllvm::Function>::run(llvm::Function&, llvm::AnalysisManagerllvm::Function&) /home/dcb40b/llvm/trunk/llvm/include/llvm/IR/PassManagerImpl.h:53:18

[dcb314]

The crash first seems to occur sometime between git hash fd88089 from yesterday 20240620
and 225d8fc from today,
which is 134 commits.

[fhahn]

Thanks for the report, caused by #92555 which has been reverted for now. I'll add a reduced test based on the reproducer.

[fhahn]

#92555 has been recommitted with a fix. Please let me know if you see any other issues!