X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fir%2Firopt.c;h=e02a230d15b0df590f1fa679e42f978b989bb032;hb=8518628459833d02e553bfbf126c5050aeddc326;hp=916a2ceb96b65d32f6e55b6261db3468fe99baa9;hpb=8c921a4125e1bf8e53e0c21da8c015158fdceb22;p=libfirm

diff --git a/ir/ir/iropt.c b/ir/ir/iropt.c
index 916a2ceb9..e02a230d1 100644
--- a/ir/ir/iropt.c
+++ b/ir/ir/iropt.c
@@ -3177,6 +3177,9 @@ static ir_node *transform_node_Not(ir_node *n) {
  * Optimize:
  *   -(~x) = x + 1
  *   -(a-b) = b - a
+ *   -(a >>u (size-1)) = a >>s (size-1)
+ *   -(a >>s (size-1)) = a >>u (size-1)
+ *   -(a * const) -> a * -const
  */
 static ir_node *transform_node_Minus(ir_node *n) {
 	ir_node *c, *oldn = n;
@@ -3252,6 +3255,7 @@ static ir_node *transform_node_Minus(ir_node *n) {
 			ir_graph *irg   = current_ir_graph;
 			ir_node  *block = get_nodes_block(a);
 			n = new_rd_Mul(dbg, irg, block, mul_l, cnst, mode);
+			DBG_OPT_ALGSIM2(oldn, a, n, FS_OPT_MINUS_MUL_C);
 			return n;
 		}
 	}