[LLVMbugs] [Bug 5151] New: Error while generating ARM code with llvm-gcc

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=5151

           Summary: Error while generating ARM code with llvm-gcc
           Product: libraries
           Version: 2.6
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: major
          Priority: P2
         Component: Common Code Generator Code
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: nbd at openwrt.org
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=3625)
 --> (http://llvm.org/bugs/attachment.cgi?id=3625)
Simplified test case

While trying to compile the kernel with an arm llvm-gcc cross toolchain, I get
this error triggered by net/sched/cls_basic.c of linux 2.6.28.10:

Assertion failed: ((!EarlyClobberRegs.test(Reg) ||
MI->isRegTiedToDefOperand(i)) && "Using an early clobbered register!"),
function forward, file RegisterScavenging.cpp, line 221.
0   llc               0x0000000100bc7ef2 std::vector<llvm::sys::Path,
std::allocator<llvm::sys::Path>
>::_M_insert_aux(__gnu_cxx::__normal_iterator<llvm::sys::Path*,
std::vector<llvm::sys::Path, std::allocator<llvm::sys::Path> > >,
llvm::sys::Path const&) + 8402
1   llc               0x0000000100bc85b6 std::vector<llvm::sys::Path,
std::allocator<llvm::sys::Path>
>::_M_insert_aux(__gnu_cxx::__normal_iterator<llvm::sys::Path*,
std::vector<llvm::sys::Path, std::allocator<llvm::sys::Path> > >,
llvm::sys::Path const&) + 10134
2   libSystem.B.dylib 0x00007fff8332c14a _sigtramp + 26
3   libSystem.B.dylib 0x00000001010627f2 _sigtramp + 2111006402
4   libSystem.B.dylib 0x00007fff833a8104 __pthread_markcancel + 0
5   llc               0x000000010095f78f
llvm::RegisterCoalescer::getAnalysisUsage(llvm::AnalysisUsage&) const + 6943
6   llc               0x00000001009303d8 llvm::DenseMap<llvm::VNInfo*,
llvm::SmallPtrSet<llvm::MachineInstr*, 4u>, llvm::DenseMapInfo<llvm::VNInfo*>,
llvm::DenseMapInfo<llvm::SmallPtrSet<llvm::MachineInstr*, 4u> >
>::FindAndConstruct(llvm::VNInfo* const&) + 3192
7   llc               0x0000000100932ccb llvm::DenseMap<llvm::VNInfo*,
llvm::SmallPtrSet<llvm::MachineInstr*, 4u>, llvm::DenseMapInfo<llvm::VNInfo*>,
llvm::DenseMapInfo<llvm::SmallPtrSet<llvm::MachineInstr*, 4u> >
>::FindAndConstruct(llvm::VNInfo* const&) + 13675
8   llc               0x00000001008f8abb llvm::sys::Path
llvm::WriteGraph<llvm::MachineFunction const*>(llvm::MachineFunction const*
const&, std::string const&, bool, std::string const&) + 2363
9   llc               0x0000000100b4af0a llvm::FunctionPass::~FunctionPass() +
42906
10  llc               0x0000000100b4b574 llvm::FunctionPass::~FunctionPass() +
44548
11  llc               0x0000000100b4b8b2 llvm::FunctionPass::~FunctionPass() +
45378
12  llc               0x0000000100020dc2 llvm::sys::SmartMutex<true>::release()
+ 24418
13  llc               0x000000010001f238 llvm::sys::SmartMutex<true>::release()
+ 17368


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