[LLVMbugs] [Bug 4054] New: ICE: bitwidth too small

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=4054

           Summary: ICE: bitwidth too small
           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 using r69856 on Ubuntu Hardy on x86.

regehr at john-home:~/volatile/tmp153$ llvm-gcc -O2 small.c -c -Wall
small.c: In function ‘int80’:
small.c:15: warning: statement with no effect
small.c:15: warning: statement with no effect
cc1: Type.cpp:913: static const llvm::IntegerType*
llvm::IntegerType::get(unsigned int): Assertion `NumBits >= MIN_INT_BITS &&
"bitwidth too small"' failed.
small.c: At top level:
small.c:31: internal compiler error: Aborted
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://llvm.org/bugs/> for instructions.

regehr at john-home:~/volatile/tmp153$ cat small.c

typedef int uint32_t;

int safe (int);

int foo (int _ui1, int _ui2)
{
  return _ui1 - 1;
}

char g_141;

int int80 (char p_71)
{
  char l;
  for (l; 1; l)
    {
      if (1)
        {
          if (safe (1))
            return p_71;
          for (p_71 = 1; p_71; p_71 = foo (p_71, 1))
            {
            }
          if (g_141)
            p_71 = p_71 & g_141;
          else
            return 1;
        }
    }
  return 0;
}


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