[LLVMbugs] [Bug 7662] New: code generator crash with -g and -O[123]

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=7662

           Summary: code generator crash with -g and -O[123]
           Product: new-bugs
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: mike at fluffypenguin.org
                CC: llvmbugs at cs.uiuc.edu


I found a crash with llvm trunk at r108631. It requires -g and -O[123]. -O0 or
-g0 prevent the crash.

C++ code that shows the crash [this is boost 1.42]

========================================
#include <boost/function.hpp>
typedef boost::function<void(void)> func_t;
struct def_func {
  void operator()() {}
};

void set_func( func_t ) { }

void run() {
  set_func( def_func() );
}
========================================

This seems to be a code generator bug.

========================================
mike at hyperion:~/debug> bugpoint -run-llc test.bc                               
                                                                               
                                                                               
                  (master:debug)
Read input file      : 'test.bc'
*** All input ok
Initializing execution environment: Found gcc: /usr/bin/gcc
Running the code generator to test for a crash: <llc>
Error running tool:
  /usr/bin/llc -o bugpoint-test-program.bc-wnDzvS.llc.s
bugpoint-test-program.bc-wnDzvS
0  llc             0x0000000000aa38ef
1  llc             0x0000000000aa3e89
2  libpthread.so.0 0x00007f7ae8a2c070
3  llc             0x0000000000764bdc llvm::DwarfDebug::endModule() + 2908
4  llc             0x000000000074d9a5
llvm::AsmPrinter::doFinalization(llvm::Module&) + 341
5  llc             0x0000000000a2e778
llvm::FPPassManager::doFinalization(llvm::Module&) + 56
6  llc             0x0000000000a31abf
llvm::FPPassManager::runOnModule(llvm::Module&) + 95
7  llc             0x0000000000a3167c
llvm::MPPassManager::runOnModule(llvm::Module&) + 508
8  llc             0x0000000000a3175e llvm::PassManagerImpl::run(llvm::Module&)
+ 110
9  llc             0x00000000004f846e main + 4334
10 libc.so.6       0x00007f7ae7b2eb6d __libc_start_main + 253
11 llc             0x00000000004f72b9
Stack dump:
0.      Program arguments: /usr/bin/llc -o
bugpoint-test-program.bc-wnDzvS.llc.s bugpoint-test-program.bc-wnDzvS 
1.      Running pass 'Function Pass Manager' on module
'bugpoint-test-program.bc-wnDzvS'.
*** Debugging code generator crash!

Checking to see if we can delete global inits: UNREACHABLE executed!
0  bugpoint        0x00000000008c7a3f
1  bugpoint        0x00000000008c7fd9
2  libpthread.so.0 0x00007f9ea5042070
3  libc.so.6       0x00007f9ea4158545 gsignal + 53
4  libc.so.6       0x00007f9ea41599c6 abort + 390
5  bugpoint        0x00000000008a8d8e llvm::llvm_unreachable_internal(char
const*, char const*, unsigned int) + 350
6  bugpoint        0x00000000004e0be9
7  bugpoint        0x00000000004e88a6
8  bugpoint        0x00000000004ea2ee llvm::WriteBitcodeToFile(llvm::Module
const*, llvm::raw_ostream&) + 190
9  bugpoint        0x00000000004ced9d
llvm::BugDriver::writeProgramToFile(std::string const&, llvm::Module*) const +
109
10 bugpoint        0x00000000004baa47
llvm::BugDriver::compileProgram(llvm::Module*, std::string*) + 199
11 bugpoint        0x00000000004aed0f
12 bugpoint        0x00000000004b23f2
13 bugpoint        0x00000000004acdd9 llvm::BugDriver::run(std::string&) + 601
14 bugpoint        0x00000000004dad08 main + 664
15 libc.so.6       0x00007f9ea4144b6d __libc_start_main + 253
16 bugpoint        0x00000000004ac879
Stack dump:
0.      Program arguments: bugpoint -run-llc test.bc 
[2]    15976 abort      bugpoint -run-llc test.bc
========================================

I've attached the bc file produced by -emit-llvm

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