Several x87 fixes, cleanups:

- typedef unsigned char vfp_liveness, to make code easier understandable
- sim_binop:
    - Add a few comments and move code around to make it easier to understand
- sim_store:
    - Don't forget to create an fxch for mode_E fstp
- sim_fCondJmp
    - Add a few comments and move code around to make it easier to understand
    - comrs already reverse Jumps, no XCHG needed
    - test for op == 0 not op1 == op2 after fxch
    - assign results to the correct register slots!

- No need for block schedule anymore, fill worklist with successor blocks
- Get liveness from birg and don't recompute

ir/be/ia32/ia32_x87.h

@@ -15,11 +15,10 @@
  * by real ones.
  *
  * @param env       architecture environment
- * @param irg       the graph to simulate and patch
- * @param blk_list  an array containing the block schedule
+ * @param birg      the graph to simulate and patch
  *
  * Registers must be allocated.		Needs a block-schedule.
  */
-void x87_simulate_graph(const arch_env_t *env, ir_graph *irg, ir_node **blk_list);
+void x87_simulate_graph(const arch_env_t *env, be_irg_t *birg);
 
 #endif /* _IA32_X87_H_ */