amd64: Use be_peephole_IncSP_IncSP().

NEWS.md

@@ -20,6 +20,7 @@ libFirm 1.22.1 (2016-01-07)
 * Add peephole optimization 'lea (%b), %d' -> 'mov %b, %d' (ia32)
 * Add peephole optimization 'testl $0x0000XX00, %eRx' -> 'testb $0xXX, %Rh' (ia32)
 * Generate slightly better code to load the floating-point constants `-0.0` and `-1.0` (ia32)
+* Reduce number of stack adjustments (amd64)
 * Bugfixes
 
 libFirm 1.22.0 (2015-12-31)

ir/be/amd64/amd64_optimize.c

@@ -109,10 +109,16 @@ static void peephole_amd64_mov_imm(ir_node *const node)
 	}
 }
 
+static void peephole_be_IncSP(ir_node *const node)
+{
+	be_peephole_IncSP_IncSP(node);
+}
+
 void amd64_peephole_optimization(ir_graph *const irg)
 {
 	ir_clear_opcodes_generic_func();
 	register_peephole_optimization(op_amd64_lea,     peephole_amd64_lea);
 	register_peephole_optimization(op_amd64_mov_imm, peephole_amd64_mov_imm);
+	register_peephole_optimization(op_be_IncSP,      peephole_be_IncSP);
 	be_peephole_opt(irg);
 }