[Ada] Use new middle-end support for overflow checking

[Eric Botcazou]

This replaces the manual implementation of overflow checking in gigi by the 
use of new middle-end support, at least in the generic case of two values not 
known at compile time.  This will generate better code than the current 
implementation, provided that the back-end implements the associated support.

Tested on x86_64-suse-linux, applied on the mainline.


2016-06-11  Eric Botcazou  <ebotcazou@adacore.com>

	* gcc-interface/trans.c (build_binary_op_trapv): If no operand is a
	constant, use the generic implementation of the middle-end; otherwise
	turn the dynamic conditions into static conditions and simplify.

-- 
Eric Botcazou
-------------- next part --------------
A non-text attachment was scrubbed...
Name: p.diff
Type: text/x-patch
Size: 10588 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20160611/717c9813/attachment.bin>