[LLVMbugs] [Bug 17642] New: llc segfault in pass "Merge disjoint stack slots"

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=17642

            Bug ID: 17642
           Summary: llc segfault in pass "Merge disjoint stack slots"
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Common Code Generator Code
          Assignee: unassignedbugs at nondot.org
          Reporter: writalnaie at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 11401
  --> http://llvm.org/bugs/attachment.cgi?id=11401&action=edit
the llvm bitcode of benchkissu.ll

llc segfault in pass "Merge disjoint stack slots". The call stack:

llc: StackColoring.cpp:331: void
{anonymous}::StackColoring::calculateLocalLiveness(): Assertion `I !=
BlockLiveness.end() && "Predecessor not found"' failed.
0  llc       0x08e41fef llvm::sys::PrintStackTrace(_IO_FILE*) + 47
1  llc       0x08e4224f
2  llc       0x08e41c2c
3            0xb7735400 __kernel_sigreturn + 0
4            0xb7735424 __kernel_vsyscall + 16
5  libc.so.6 0xb7431b1f gsignal + 79
6  libc.so.6 0xb74350b3 abort + 323
7  libc.so.6 0xb742a877
8  libc.so.6 0xb742a927
9  llc       0x08a6500b
10 llc       0x08a6c244
11 llc       0x0897beb2
llvm::MachineFunctionPass::runOnFunction(llvm::Function&) + 194
12 llc       0x08dc85dc llvm::FPPassManager::runOnFunction(llvm::Function&) +
796
13 llc       0x08dc8628 llvm::FPPassManager::runOnModule(llvm::Module&) + 56
14 llc       0x08dc8184 llvm::MPPassManager::runOnModule(llvm::Module&) + 676
15 llc       0x08dca0b3 llvm::PassManagerImpl::run(llvm::Module&) + 243
16 llc       0x08dca1b6 llvm::PassManager::run(llvm::Module&) + 38
17 llc       0x081c1154
18 llc       0x081ae01f main + 383
19 libc.so.6 0xb741c935 __libc_start_main + 245
20 llc       0x081bd839
Stack dump:
0.    Program arguments: llc -O3 benchkissu.ll 
1.    Running pass 'Function Pass Manager' on module 'benchkissu.ll'.
2.    Running pass 'Merge disjoint stack slots' on function '@main'
Aborted (core dumped)

It's in LLVM-3.3's released source code. The configuration includes only
"--enable-libffi". It segfaults when

$ llc -O3 benchkissu.ll

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