Mark Mitchell wrote:
Mark Mitchell wrote:
I've been told that Intel's ICC compiler also does this optimization:
Apparently, IAR's Atmel AVR compiler does this optimization as well.
That CPU has 16-bit addresses, so the tester changed the test case to
use "1 << 14" instead of "1 << 30".
I've also been told that Microsoft Visual C++ 2005 compiler does this
optimization.
Chad, Robert, are you going to update the CERT notice to reflect all of
this additional information about other compilers that also do this
optimization?
Here is the code generated:
; Listing generated by Microsoft (R) Optimizing Compiler Version
14.00.50727.762
...
; Function compile flags: /Ogtpy
...
; 2 : len = 1 << 30;
; 3 : if (buf + len < buf)
; 4 : return 1;
; 5 :
; 6 :
; 7 : return 0;
xor eax, eax
; 8 : }
--
Mark Mitchell
CodeSourcery
[EMAIL PROTECTED]
(650) 331-3385 x713
