IX12698 Incorrect results may be produced when the -O option is specified.
IX12705 A user defined subroutine named after one of the system routines,
	getenv, system, signal, or abort will not be called properly.
IX12493 Complex exponentiation and division within the PARAMETER statement are 
	not handled correctly by the compiler.
IX12435 The compiler will issue an internal compiler error message when
	an include statement has a zero length file name specified. 
IX12371 Sometimes an entry statement is removed when -O is specified.
IX12246 Incorrect results may be produced for statements containing multiple 
	references to the same statement function, if the statement function 
	contains relational and/or logical expressions.
IX12170 Fix for SIGN intrinsic function for floating point.  The sign of -0.0
	should be positive.
IX12155 Source files names longer than 20 characters are not handled correctly 
	by the compiler.
IX12152 The ld option -bl is not processed correctly by the compiler when 
	used to compile files containing multiple compilation units.
IX12148 The name of the object file is incorrect when the source file
	suffix is something other than "f".
IX12090 A program containing references to variables which are equivalenced 
	with members of COMMON, may not execute as expected if compiled with 
	-O.
IX12032 A program containing recursive procedure calls may not execute as 
	expected if the recursive procedure contains static variables and 
	is compiled with -O.
IX12118 The compiler may issue an internal compiler error message if the 
	trailing period is missing from the logical constant '.TRUE.'.  
	If the option -qdebug=except:tracebk is specified, a traceback is 
	issued from PSEUDO_PARSE_LOOP.
IX12049 Incorrect results may be produced when the -O option has been used.
IX11666 Compiler may trap in V_DJOINT when program is compiled with -O.
IX11540 Incorrect results may be produced when the -O option has been used.
IX11454 Nested implied DOs in a DATA statement are not handled correctly by 
	the compiler.
IX11453 A write to an internal file may fail with optimization if the format
	contains literals or Hollerith constants after the last edit
	descriptor.
IX11424	A program containing calls to user-defined subprograms 'rand' and
        'srand' will fail to execute as expected.	
IX11362 The xlf command reorders object files passed to ld.
IX11298 The compiler issues an internal compiler error message for a 
	character PARAMETER statement containing typeless constants.
IX11285 A trap is not generated for a constant subscript range violation
	when the check option is specified.
IX11282 Old .o files are not erased before the start of compilation.  ld is
	always invoked regardless of the success of the compilation.
IX11239 Incorrect results may be produced when the -O option has been used.
IX11220 Incorrect results may be produced for the assignment "x = x", where 
	"x" is a character variable, if the -O option has been specified.
IX11204 REAL*16 and COMPLEX*32 arrays were treated as scalars within DBX.
IX11186 Options not directed to the compiler, which require an argument 
	that has not been supplied, will result in incorrect processing of 
	options.
IX11036 The compiler issues an internal compiler error message when the 
	-O option is used.  If the option -qdebug=except:tracebk is also
	specified, a traceback is issued from MEMID.
IX10989 A warning message is issued by the compiler if there are characters 
	following the closing parenthesis in a compile-time format.
IX10884 Integer and logical intrinsic functions may not be handled correctly
	by the compiler when the NOI4 option is specified.
IX10853 Incorrect results may be produced when the -O option has been used.
IX09654 Incorrect results may be produced when the -O option has been used.
IX09648 The compiler issues an internal compiler error message when the
	-O option is used.  If the option -qdebug=except:tracebk is also 
	specified, a traceback is issued from EQUIVALENT_DEFS.
IX09638 The compiler issues an internal compiler error message when the 
	-O option is used.  If the option -qdebug=except:tracebk is also 
	specified, a traceback is issued from V_GETARG.
IX09565 A coredump at runtime may occur for programs compiled with -O.
IX09454 Fix for a non-Fortran problem in a common component.
IX09446 Compiling code with functions named bb, eb, bf, ef, target, xfake,
	eos, file, text, data or bss with the -g option may cause the 
	linkage editor to fail.
IX09398 Fix for a C-specific compiler problem in a common component.
IX09256 Fix for a Pascal-specific compiler problem in a common component.