[Bug tree-optimization/55970] [x86] Avoid reverse order of function argument gimplifying

[manu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55970

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |manu at gcc dot gnu.org

--- Comment #6 from Manuel López-Ibáñez <manu at gcc dot gnu.org> 2013-02-04 11:15:15 UTC ---
You could use a wrapper function to guarantee order of evaluation. The one here
seems a bit too complex:

http://stackoverflow.com/questions/14058592/how-to-guarantee-order-of-argument-evaluation-when-calling-a-function-object

Or you could build a gcc plugin that adds a wrapper around each function call
in order to evaluate arguments left-to-right.

GCC should definitely warn about this, isn't there a bug open?

Another testcase is:

void f(int, int);

void test() {
  int i = 0;
  int v[1] = {0};
  f(v[i], i++); // warn
}

This one doesn't involve function calls in the arguments.