[tree-ssa] bootstrap failure on ppc-apple-darwin6.6

[Andrew Pinski]

The rtl right after it gcc converts simple to rtl differers for some 
reason (- is the correct one):

  (insn 11 10 12 0x0 (set (reg/v:SI 120 [ op ])
          (mem/f:SI (plus:SI (reg/f:SI 113 virtual-incoming-args)
-                (const_int 40 [0x28])) [61 op+0 S4 A32])) -1 (nil)
+                (const_int 32 [0x20])) [61 op+0 S4 A32])) -1 (nil)
      (expr_list:REG_EQUIV (mem/f:SI (plus:SI (reg/f:SI 113 
virtual-incoming-args)
-                (const_int 40 [0x28])) [61 op+0 S4 A32])
+                (const_int 32 [0x20])) [61 op+0 S4 A32])
          (nil)))



Thanks,
Andrew Pinski