[PATCH] Optimize strlen comparisons against zero (take 3)

[Richard Henderson]

On Wed, Nov 14, 2001 at 03:16:03PM -0700, Roger Sayle wrote:
> 	* fold-const.c (fold): Optimize strlen comparisons against zero.
> 	* string-opt-13.c: New testcase.

Applied.  Couple o things:

One, watch your indentation -- it was off by 2. 

Two, I added a check for (code == NE_EXPR || code == EQ_EXPR) for
pedantry.  Other codes *shouldn't* have gotten there due to the
unsigned return value of strlen, but presupposing that an optimization
must have been done before and would not have been done after is a
bad idea.


r~