folding STRING_CST + INTEGER_CST

[Joseph S. Myers]

On Mon, 24 Jun 2002, Aldy Hernandez wrote:

> another alternative is to fold STRING_CST+INTEGER_CST when we are
> building the trees for certain builtins accepting "const char *".  
> the following come to mind:
> 
> 	strspn, strstr, strcspn, strrchr, strchr, index, fputs
> 
> ...since we know we don't need equality operations on them.

Some of these functions return pointers into their arguments, which may
then get compared afterwards.

-- 
Joseph S. Myers
jsm28@cam.ac.uk