Add a couple of A?CST1:CST2 match and simplify optimizations

Instead of some of the more manual optimizations inside phi-opt,
it would be good idea to do a lot of the heavy lifting inside match
and simplify instead. In the process, this moves the three simple
A?CST1:CST2 (where CST1 or CST2 is zero) simplifications.

OK? Boostrapped and tested on x86_64-linux-gnu with no regressions.

Differences from V1:
* Use bit_xor 1 instead of bit_not to fix the problem with boolean types
which are not 1 bit precision.

Thanks,
Andrew Pinski

gcc:
	* match.pd (A?CST1:CST2): Add simplifcations for A?0:+-1, A?+-1:0,
	A?POW2:0 and A?0:POW2.

0 files changed, 0 insertions, 0 deletions