http://llvm.org/bugs/show_bug.cgi?id=3896
Summary: Valgrind reports problems in
llvm::RegsForValue::getCopyFromRegs
Product: new-bugs
Version: unspecified
Platform: Other
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: new bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Valgrind reports the following for many codegen tests. This one is for
test/CodeGen/ARM/2007-08-15-ReuseBug.ll:
Conditional jump or move depends on uninitialised value(s)
at 0xCB0341: llvm::APInt::countLeadingOnes() const
by 0x98279C: (within /usr/local/bin/llc)
by 0x98A06E: llvm::SelectionDAGLowering::getValue(llvm::Value const*)
by 0x9A2037: llvm::SelectionDAGLowering::visitBinary(llvm::User&, unsigned
int)
by 0x9B72CB: llvm::SelectionDAGISel::SelectBasicBlock(llvm::BasicBlock*,
llvm::ilist_iterator<llvm::Instruction>,
llvm::ilist_iterator<llvm::Instruction>)
by 0x9B7617: llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function&,
llvm::MachineFunction&, llvm::MachineModuleInfo*, llvm::DwarfWriter*,
llvm::TargetInstrInfo const&)
by 0x9B8975: llvm::SelectionDAGISel::runOnFunction(llvm::Function&)
by 0xC7DC38: llvm::FPPassManager::runOnFunction(llvm::Function&)
by 0xC7E655: llvm::FunctionPassManagerImpl::run(llvm::Function&)
by 0xC7E80A: llvm::FunctionPassManager::run(llvm::Function&)
by 0x5083A0: main
And it calculates that the ultimate origin of this was:
Uninitialised value was created by a stack allocation
at 0x9B2D04: llvm::SelectionDAGISel::ComputeLiveOutVRegInfo()
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