SimplifyDemandedBits uses an uninitialized value #2066
Description
| Bugzilla Link | 1694 |
| Resolution | DUPLICATE |
| Resolved on | Sep 21, 2007 12:08 |
| Version | unspecified |
| OS | Linux |
| Reporter | LLVM Bugzilla Contributor |
Extended Description
Running test/CodeGen/ARM/2007-08-14-SpillDeadDef.ll under valgrind gives
Conditional jump or move depends on uninitialised value(s)
at 0x86420A3: llvm::TargetLowering::SimplifyDemandedBits(llvm::SDOperand, unsigned long long, unsigned long long&, unsigned long long&, llvm::TargetLowering::TargetLoweringOpt&, unsigned) const (TargetLowering.cpp:516)
by 0x86411DB: llvm::TargetLowering::SimplifyDemandedBits(llvm::SDOperand, unsigned long long, unsigned long long&, unsigned long long&, llvm::TargetLowering::TargetLoweringOpt&, unsigned) const (TargetLowering.cpp:403)
by 0x85D1829: (anonymous namespace)::DAGCombiner::SimplifyDemandedBits(llvm::SDOperand) (DAGCombiner.cpp:159)
by 0x85D838B: (anonymous namespace)::DAGCombiner::visitAND(llvm::SDNode*) (DAGCombiner.cpp:1525)
by 0x85DB03C: (anonymous namespace)::DAGCombiner::visit(llvm::SDNode*) (DAGCombiner.cpp:647)
by 0x85DB7C5: (anonymous namespace)::DAGCombiner::Run(bool) (DAGCombiner.cpp:578)
by 0x85DBD2A: llvm::SelectionDAG::Combine(bool, llvm::AliasAnalysis&) (DAGCombiner.cpp:4773)
by 0x860B2BE: llvm::SelectionDAGISel::CodeGenAndEmitDAG(llvm::SelectionDAG&) (SelectionDAGISel.cpp:4627)
by 0x861F5D2: llvm::SelectionDAGISel::SelectBasicBlock(llvm::BasicBlock*, llvm::MachineFunction&, llvm::FunctionLoweringInfo&) (SelectionDAGISel.cpp:4664)
by 0x8621211: llvm::SelectionDAGISel::runOnFunction(llvm::Function&) (SelectionDAGISel.cpp:4365)
by 0x8822027: llvm::FPPassManager::runOnFunction(llvm::Function&) (PassManager.cpp:1168)
by 0x8822285: llvm::FunctionPassManagerImpl::run(llvm::Function&) (PassManager.cpp:1126)
Conditional jump or move depends on uninitialised value(s)
at 0x86420A3: llvm::TargetLowering::SimplifyDemandedBits(llvm::SDOperand, unsigned long long, unsigned long lo
ng&, unsigned long long&, llvm::TargetLowering::TargetLoweringOpt&, unsigned) const (TargetLowering.cpp:516) by 0x86412AA: llvm::TargetLowering::SimplifyDemandedBits(llvm::SDOperand, unsigned long long, unsigned long lo
ng&, unsigned long long&, llvm::TargetLowering::TargetLoweringOpt&, unsigned) const (TargetLowering.cpp:407)
by 0x85D1829: (anonymous namespace)::DAGCombiner::SimplifyDemandedBits(llvm::SDOperand) (DAGCombiner.cpp:159)
by 0x85D838B: (anonymous namespace)::DAGCombiner::visitAND(llvm::SDNode*) (DAGCombiner.cpp:1525)
by 0x85DB03C: (anonymous namespace)::DAGCombiner::visit(llvm::SDNode*) (DAGCombiner.cpp:647)
by 0x85DB7C5: (anonymous namespace)::DAGCombiner::Run(bool) (DAGCombiner.cpp:578)
by 0x85DBD2A: llvm::SelectionDAG::Combine(bool, llvm::AliasAnalysis&) (DAGCombiner.cpp:4773)
by 0x860B2BE: llvm::SelectionDAGISel::CodeGenAndEmitDAG(llvm::SelectionDAG&) (SelectionDAGISel.cpp:4627)
by 0x861F5D2: llvm::SelectionDAGISel::SelectBasicBlock(llvm::BasicBlock*, llvm::MachineFunction&, llvm::FunctionLoweringInfo&) (SelectionDAGISel.cpp:4664)
by 0x8621211: llvm::SelectionDAGISel::runOnFunction(llvm::Function&) (SelectionDAGISel.cpp:4365)
by 0x8822027: llvm::FPPassManager::runOnFunction(llvm::Function&) (PassManager.cpp:1168)
by 0x8822285: llvm::FunctionPassManagerImpl::run(llvm::Function&) (PassManager.cpp:1126)
Reproduce using
llvm-as < 2007-08-14-SpillDeadDef.ll | valgrind --tool=memcheck llc -mtriple=arm-apple-darwin > /dev/null