Fix r15779 and generalise. Also implement
authorChristoph Mallon <christoph.mallon@gmx.de>
Thu, 13 Sep 2007 13:22:04 +0000 (13:22 +0000)
committerChristoph Mallon <christoph.mallon@gmx.de>
Thu, 13 Sep 2007 13:22:04 +0000 (13:22 +0000)
commit930f2dd6bb1a970ce54f485775945c855b3b30a5
treea49005e26569c013e711ed960280292a77847893
parent67e3d2b7b9c3cc2b406fce8b159ba357107b89c5
Fix r15779 and generalise. Also implement
- -a - b -> -(a + b)
- a - -b -> a + b

[r15781]
ir/ir/iropt.c