• Important information
• New features
• Known problems
• Program corrections
• User documentation corrections
• Miscellaneous
• Release history

Important information

• To avoid the space-consuming tables used for character classification (ctype.h), define the preprocessor symbol __NO_CTYPE_TABLES before the ctype.h file is included.

• The compiler now avoids the LDRD instruction with the base register in list when generating code for Cortex-M3. This is to work around the Cortex-M3 erratum 602117.

New features

• None

Known problems

• If your code contains hundreds of global variables and you compile it at a high optimization level, the compilation time might be very long.
  [EW14199]

• Special function registers (SFRs) declared as write-only in the header files included with the product are not treated as such by the compiler. The generated code may incorrectly use read-modify-writeback sequences.
  [EW14302]

• The C/C++ library header file time.h declares the library function mktime. When called with a negative value in the broken-down time component tm_isdst, which is part of the tm struct function parameter, mktime fails to determine whether Daylight Saving Time is active for the specified time or not.
  [EW14632]

• The DLIB4 library function fpclassify() incorrectly returns FP_NORMAL, instead of FP_SUBNORMAL, when supplied with a subnormal number.
  [EW21098]

• Small memcpy calls might be transformed to assignments even if the source or destination address has wrong alignment.
  [EW21193]

Program corrections

• cstartup_M.c now includes default interrupt handlers.
  [EW21314]

• Expressions on the form
  if (expr < 0) v = -expr;
  are no longer optimized incorrectly.
  [EW21340]

• A test inside a loop is no longer optimized incorrectly if
  a) the loop had constant values for the initial and the final iteration,
  b) the test compared an expression to a constant, and
  c) the calculation of the expression would overflow or underflow for either the initial or final iteration.
  [EW21363]

• Complex |-expressions no longer cause infinite loops during optimization.
  [EW21380]

• Registers might be spilled to the stack frame when there are more live variables than registers. A spilled large register parameter (more than 8 bytes) no longer results in an internal error.
  [EW21386]

• The linker is now more relaxed concerning attribute checking when linking with explicitly specified libraries.
  [EW21387]

• Absolute addressed variable accesses no longer loose the volatile attribute during optimization.
  [EW21400]

• Debug information for classes inheriting from a base class whose primary base was inherited virtually is no longer generated incorrectly. The old problem could result in incorrect display of base classes in C-SPY.
  [EW21411]

• An error from the assembler in inline assembler code is no longer reported as a compiler internal error.
  [EW21436]

• The compiler now encodes the character value 255 in a string literal using an escape sequence, to work around the fact that the assembler interprets such a value as end of file.
  [EW21443]

• Registers are no longer renamed in situations where unused registers become used after renaming, to avoid situations where such registers would not be saved on the stack.
  [EW21449]

• The compiler now generates correct code instead of reporting an internal error in situations where an entry in a constant table is duplicated so that it can be reached by all its references.
  [EW21471]

User documentation corrections

• IAR C/C++ Development Guide for ARM® (DARM-4), new functions:
  
  
  • Page 162-163: Cortex-R4F is added to the list of recognized processors.
    
  
  
  • Page 172: VFPv3 is added to the list of parameters of the --fpu command line option.
    
  
  
  • Page 284: __ARMVFP__ is defined to 3 for VFPv3.
    


• IAR C/C++ Development Guide for ARM® (DARM-4), clarifications and corrections:
  
  
  • Page 30: Replace DATA_C with .rodata and DATA_I with .data (initializer in .data_init).
    
  
  
  • Page 163: Append clarification to four of the recognized processors:
    
    - ARM1176J (also alias for ARM1176JZ)
    - ARM1176J-S (also alias for ARM1176JZ-S)
    - ARM1176JF (also alias for ARM1176JZF)
    - ARM1176JF-S (also alias for ARM1176JZF-S)
    
  
  
  • Page 240: Replace CODE_I with .textrw.
    
  
  
  • Page 263 and 266: __DMB(), __DSB() and __ISB() are also available for the ARM v6M architecture.
    

Miscellaneous

• Generate workarounds for hardware problems:

  • Functional problem Core.1 in NXP device LPC2478: Incorrect update of the Abort Link register in Thumb state.
    Workaround generated with iccarm --enable_hardware_workaround=NXP_Core.1

Release history

See iccarm_history.ENU.htm.

Copyright © 1999-2009 IAR Systems AB.