[PATCH] More constant folding of pow.

[Richard Henderson]

On Wed, Apr 02, 2003 at 01:33:41PM -0700, Roger Sayle wrote:
> 	* builtins.c (fold_builtin):  Constant fold expressions as x*0.5
> 	instead of x/2.0.  Optimize sqrt(pow(x,y)) as pow(x,y*0.5),
> 	log(pow(x,y)) as y*log(x), pow(exp(x),y) as exp(x*y),
> 	pow(sqrt(x),y) as pow(x,y*0.5) and pow(pow(x,y),z) as pow(x,y*z).
> 	Delete function scope "fcode" variable to avoid shadowing.

Ok.

> 	* gcc.dg/builtins-9.c: New test case.

I guess this is ok.  Can you do better to check the
optimization applied?


r~