[LLVMbugs] [Bug 4732] New: spurious undefined reference

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=4732

           Summary: spurious undefined reference
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: regehr at cs.utah.edu
                CC: llvmbugs at cs.uiuc.edu


Seen on Ubuntu Hardy on x86.

regehr at john-home:~/volatile/tmp181$ clang -O3 small.c -o foo
/tmp/cc-LeSGPe.o: In function `int321':
small.c:(.text+0x8a): undefined reference to `.LBB5_1'
small.c:(.text+0x90): undefined reference to `.LBB5_1'
collect2: ld returned 1 exit status
clang: error: linker command failed with exit code 1 (use -v to see invocation)

regehr at john-home:~/volatile/tmp181$ clang -v

clang version 1.0 (http://llvm.org/svn/llvm-project/cfe/trunk 79189)
Target: i386-pc-linux-gnu
Thread model: posix

regehr at john-home:~/volatile/tmp181$ cat small.c

char foo1 (int _si1, char _si2)
{
  return 0 > 1 || _si1 <= 0 && _si1 < _si2 || 0 ? : 1;
}

char foo2 (int _si1, char _si2)
{
  return 0;
}

char foo3 (int _si1, char _si2)
{
  return 0 && 1 || _si2 > 0 && (-2147483647 - 1 / _si2) ? : _si2;
}

char func_16 (int z, int a)
{
  return 0;
}

void int321 (char p_103, int uint8p_104)
{
  char l_106;
  func_16 (foo1
           (p_103 || foo3 (l_106, p_103), 1), 1);
  for (; p_103 <= 1; foo2(0,0))
    {
    }
}

int main (void)
{
}


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