[LLVMbugs] [Bug 2729] New: Overflow in constant expressions not caught

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Thu Aug 28 07:22:19 PDT 2008


http://llvm.org/bugs/show_bug.cgi?id=2729

           Summary: Overflow in constant expressions not caught
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: NetBSD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Semantic Analyzer
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: neil at daikokuya.co.uk
                CC: llvmbugs at cs.uiuc.edu


Constraint 6.6p4 in C99 requires constant expressions evaluate to values within
the range of their type.  The following violation of that constraint is
accepted in pedantic-errors mode.

#include <limits.h>

enum { ns = -INT_MIN };         /* Overflow.  */


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