Fresh Fish 5/FreshFish_July-August1994.bin/bbs/dev/adev11.lha/ADev11/c/bug_list

Text File | 1992-12-13 | 7.4 KB | 141 lines

This is the bug fix list, please check it before posting a bug report in
order to reduce duplication.  The list will be sorted by greatest
severity and then in order of date reported.

LEVEL is the severity of the error from the following list
  4 - compiler error - failure to parse C language
  3 - incorrect code is generated
  2 - generated code could be improved/optimized
  1 - cosmetic improvements

NEXT ID = 65

ID  LEVEL  DESCRIPTION

  -------- LIVE BUGS --------
61    4     if the first of two arguments to a function call contains an
              expression with an undefined symbol the following argument
              (a simple variable) is the one declared as undefined.
54    4     the compiler does not correctly pass instances of structures to
              functions, it seems that was never coded in.  Passing a
              structure rather than a pointer to it is a dumb idea anyway.
51    4     prototype checking for too few arguments is non-existant
38    4     the compiler forgets to generate a label for a static function
              that is consistent with the label it uses when the address
              of the function is stored in a function pointer.
37    4     the compiler was never coded to initialize structures local to
              a function. An example statement would be;
              struct st = {3, 4, DOG};
64    3     printf does not handle floats
62    3     scanf does not work at all for reasons I don't understand and
              can't determine without a better debugging system.
60    3     the put_asc_l family of functions in C_lib are not implemented
              thus attempts to print longs will not happen.
56    2     a "register used" tracking peep-hole optimization could markedly
              improve code generation in cases such as
                * if (*chr_ptr == 's') {
                        ldx   _chr_ptr
                        ldab  0,x
                        cmpb  #'s'
                        bne   L4
                *   ...
                * } else if (*chr_ptr == 't') {
                L4
                        ldx   _chr_ptr
                        ldab  0,x
                        cmpb  #'t'
                        bne   L5
                *   ...
                * }
              In the second clause both the ldx and ldab could be removed,
              This is a tricky optimization and will be left undone.
44    2     change the linker to allow replacing functions
20    2     add an option/keyword/pragma to allow placement of variables
              in zero page memory
21    1     allow C++ style comments
14    1     eliminate the lc_auto label used for local var access (inc  4-L1,Y)

  -------- NEWLY DEAD BUGS --------

  -------- ROTTING BUGS --------
49    4     ellipsis handling for prototype checking is incorrect
50    4     prototype checking for too many arguments is non-existant
59    3     bugs in conversions of larger types to smaller types
58    3     comparisons generating incorrect code
57    3     casts of constants are being ignored
53    3     missing ldx 0,x in direct version of switch statement
52    3     various fixes to stdio routines
45    3     the following statement breaks the compiler repeatedly
              file_ptr->_buff[file_ptr->_wr_cnt++] = *((char *)file_ptr->_io_ext->_data)++;
43    3     two errors in the long branch optimizer could (although rarely)
              cause a short branch range to be exceeded.
39    3     size of return values from functions is not being used.  The
              default size of int is being used.
36    3     initialization of structures, longs and pointers are not correct
35    3     return of address of variable produces a 68000 addr mode
29    3     post fix auto increment of longs where result is used in further
              expressions is not done
26    3     incorrect handling of char cast to int as function parameter
22    3     bugs in string usage
17    3     multiply and divide library functions need to be coded
16    3     all comparisons (if, while etc.) will not work with longs
              this is due to missing 4 byte compare
15    3     one form of switch statement will not work with longs
              this is due to missing 4 byte compare
12    3     various errors in local vars, using local vars, function
              parameters -Stan
13    3     returning a constant from a function resulted in a 68000 instr -Stan
6     3     a short branch is always used even when a long one is req'd -Stan
7     3     the switch statement generates a sequence that crashes SAsm -Stan
5     3     increment decrement is not correct with longs -Stan
2     3     incorrect code in ?: syntax -Stan
31    2     a hangover from the 68000 version is forcing structures to an
              even byte size
32    2     the assembler (SAsm) must be modified to handle zero page
              XREF's  (XREF.z    L99999999) and segments
24    2     Modify linker to handle IDATA
28    2     auto increment by sizes other than char doesn't advance efficiently
              for post fix forms
25    2     write c.o startup program
55    2     optimize std x/ldd x and stab x/ldab x
46    2     optimize ldd followed by cpd #0
41    2     optimize the &= and |= operators to bit ops where possible and
              add a compiler option to generate 6301 bit ops instead or to
              not generate bit ops if 6301 bit ops prove insufficient.
              CANCEL!! 6301 can never be used effectively with C (no Y reg)
42    2     optimize the +, -, += and -= operators to do a faster version
              when the operand is a simple variable.
48    2     use of float variables should now be correct.  There is also a
              new library (math.lib) containing arithmatic and trigonometric
              functions.
47    2     three HC11 specific builtin functions must be added; enable_intr()
              = CLI, disable_intr() = SEI and wait_for_intr() = WAI
34    2     add peephole optimization cmpb #0 ==> tstb and if it follows a
              ldab remove it completely
19    2     add an option to generate PROMable programs
              ( the -P option generates initialized data into an IDATA segment
              when the linker sees this, it creates a BSS the size of the
              segment and make this segment into code. Your program must call
              _init_data to cause the code image to be copied to the BSS.
              This will first require a rev of the linker.)
1     2     allow for 8 bit pushes to stack instead of "pshd" in binary ops
              with 8 bit operands -Stan
10    2     create a static compiler option that forces local vars to
              static -Stan
              ( this option is -w )
9     2     optimize incdec to use inx/dex for 2 byte operands -Stan
              (this was not done, the existing method is one byte longer
              but, normally, 4 cycles faster.)
4     2     automatic promotion of numerics to any size (with cbl cwl) does
              not happen -Stan
8     2     the switch statement needs optimization
3     2     multiply of char * char to char forces to int size -Stan
63    1     the quiet option now defaults to on
23    1     compiler always reports same version at startup
27    1     write printf,scanf routines
40    1     due to the importance of prototypes for return values from
              functions it is neccesary to add a warning whenever a
              function is used before its prototype is known.
33    1     default path for includes should be ADev11:include
11    1     remove muldiv32 option